Address Append Services
Address Appending Services for Direct Marketing Campaigns
Starting with an email address or phone number, we provide postal address information for your marketing campaigns. Add additional demographics or premium contact data based on your needs. We now offer contactability scoring for appended phone numbers to help your growing organization close more business.

What is Address Appending? How Do I Get Started?
- Address Append is a data enrichment process that starts with your existing database of contacts. With Accurate Append, you can bring your own list, or start with ours using hundreds of audience-building criteria.
- Transfer your contacts file with the data points you have, such as name and phone number.
- Our processes integrate public and proprietary data from multiple sources to add the best address.
- We can work with just about any file to add new contact points.
- Our append services can build off of mobile phones, landlines, or email addresses.
- We can append from a phone number using a “reverse phone append” to return a name and postal address.
Data Logistics You Can Trust for Your Marketing Campaigns
Accurate Append is a technology company focused on service, responsiveness, and security. We make it easy to instantly understand your results and we offer free match report tests to quantify the data improvements you can expect when you partner with us.
Authoritative Data Source
You need to know you’re calling the right person, at the right number, that they are likely to answer. That’s ADS Phones — our new premium matching and scoring service for discerning marketers.
Dedicated to Your Success
We specialize in creating the best data solutions to match your needs. Our teammembers are trained in stacking products to get the very best results from your data.
Frequently Asked Questions About Address Appending
Quality marketing data and customer lists are the fuel for a growing business.
IBM and Gartner have estimated that poor data costs businesses millions of dollars in losses each year — that’s why Accurate Append offers the best average match rates for your data enhancement projects.
Our specialty is providing the very best match rates by managing the premium data waterfall for you, so you can focus on running your business.
Yes! Direct mail campaigns typically get better response and conversion rates than email and advertising campaigns. If you want to expand your nonprofit donor base, address appends can help. Start with name and email or phone number for your target audiences, and we can provide postal addresses for your contact lists.
Direct mail is a great marketing tool for just about any consumer-serving business. Accurate Append’s data services are a great fit for higher education, mortgage lending and other real estate businesses, travel and hospitality, healthcare services, and marketing agencies looking to improve their customer lists and conversion rates.
In order to append the best address, please provide name and either phone number or email address, or both. Our services covers the United States.
We understand working with large data sets is complicated enough as it is, so our software safely appends phone numbers to the end of your record, keeping all of the other data in the file intact.
Pricing varies depending on the number of records in your job, the number of records for which we find matches and the types of enhancements that will best serve your project. Please contact our experts for a free analysis of your data and a detailed estimate.
Yes! We will use an existing name and address to append mobile phones, landline phones and/or email addresses to your list of contacts.
You may receive results in a matter of minutes after submitting your file for processing, depending on the size of your file. 90% of orders are completed the same business day.
Reverse Phone Append Services
Reverse Phone Appending Services to Reach More Leads and Prospects
What is a reverse phone append? Our service starts with your database of customer, supporter, or prospect phone numbers. Using multiple data sources, we enrich your data with the most current and accurate postal addresses and additional information like mobile phones and customer demographics.

What is Reverse Phone Appending? How Do I Get Started?
- Reverse Phone Append is a data enrichment process that starts with your existing database of contacts. With Accurate Append, you can bring your own list, or start with ours using hundreds of audience-building criteria.
- Transfer your contacts file with the phone numbers you already have — even if they are out of date.
- Our processes integrate public and proprietary data from multiple sources to add and verify additional information, from contacts to demographic and predictive data.
- We can work with just about any file to add new contact points.
- Our reverse phone appends cover both mobile and home phones.
Data Logistics You Can Trust for Your Phone Campaigns
Accurate Append is a technology company focused on service, responsiveness, and security. We make it easy to instantly understand your results and we offer free match report tests to quantify the data improvements you can expect when you partner with us.
Authoritative Data Source
You need to know you’re calling the right person, at the right number, that they are likely to answer. That’s ADS Phones — our new premium matching and scoring service for discerning marketers.
Dedicated to Your Success
We specialize in creating the best data solutions to match your needs. Our teammembers are trained in stacking products to get the very best results from your data.
Frequently Asked Questions About Reverse Phone Appending
In order to append the information available we ask that you provide a full number plus any additional contact information from your database. Including a last name with the existing phone number is particularly effective. Our service covers the United States.
We understand working with large data sets is complicated enough as it is, so our software safely appends phone numbers to the end of your record, keeping all of the other data in the file intact.
Pricing varies depending on the number of records in your job, the number of records for which we find matches and the types of enhancements that will best serve your project. Please contact our experts for a free analysis of your data and a detailed estimate.
Yes! We will take your list of phone numbers and append additional contact information and other demographics based on your marketing campaigns.
You may receive results in a matter of minutes after submitting your file for processing, depending on the size of your file. 90% of orders are completed the same business day.
Yes, we offer multiple phone append APIs. These APIs support standard phone append in addition to reverse phone append. More information is available on our API page.
Reverse Email Append
Reverse Email Append Services that Improve Audience Data
Email is one of the most effective ways to reach leads and customers, but if you need to improve outreach and contact rates to grow your organization, count on Accurate Append. Provide an email address in batch or through our API and we’ll enrich your contact using reverse email appending.

What is Reverse Email Append? How Do I Get Started?
- Reverse Email Appending starts with your customer or supporter email database.
- We use a proven process to assess your contact records and reliably match them to our premium data sources.
- Using secure FTP or our API, we enrich matched email addresses with your desired audience information.
Trusted Results
Our proven processes ensure you get back most accurate contact data for your growing organization. We make it easy to get the results you want with contactability scores and email verification.
Constant Improvement
Accurate Append is always improving our data with real-time sources and enrichments so you can count on getting the most matches and most up-to-date information on your audiences.
Premier Support for Your Campaigns
We want your ongoing business and referrals — that’s why we offer every customer expert support and the custom data solutions and advice you need to succeed.
Frequently Asked Questions About Reverse Email Appending
Your successful marketing campaign is just one step away! If you have a name and an email address, even an old email address!, we can provide additional contact information for your consumer marketing database.
Our reverse email append services are popular with growing SMEs that want to improve contact rates for email, phone, and direct mail campaigns. Provide a customer list or supporter database for with email address using secure FTP, our API, or use the self-serve website and we’ll match and append the additional information you need to reach your target audience.
Accurate Append is continually improving our data waterfall to provide the highest quality data and the most matches through a mix of proprietary and premium partner data. Your marketing and sales projects deserve the very best. Reach current customers on more marketing channels today!
Our technology processes pinpoint the right person and their current contact information. An older address is enough to start the process and help us find the maximum number of deliverable emails for the people in your audience.
We understand working with large data sets is complicated enough as it is, so our software safely appends emails to the end of your record, keeping all of the other data in the file intact.
Yes, email verification is one of our services, and in many cases we can even add usable email addresses to records that come back as undeliverable. This service can be very helpful for updating your email database that hasn’t been used in some time, or where more and more addresses are bouncing.
Pricing is based on record count, the appends that are ordered, and how frequently files are submitted for appending.
You may receive results in a matter of minutes after submitting your file for processing, depending on the size of your file. 90% of orders are completed the same business day.
Yes! We will use your existing email address locate the matching name and postal address. We can also match landline and mobile phone numbers if needed for your campaign.
Yes, we offer email append and reverse email append on API. More information is available on our API page.
Demographic Append
Demographic Append Services & API: Understand Your Target Audience
Our demographic append services & API enhance your data with demographic attributes that help you increase the effectiveness of your marketing campaigns.

What is Demographic Appending? How Can It Help Your Business?
Demographic append is the process of supplementing your customer data with information such as birth year, gender, income, credit score, education level, and other demographic aspects. Through demographic appending, businesses can benefit from the following:
- Increase your targeting efficiency: By understanding the demographic details of your clients, you can separate them into different groups and tailor your promotional content to each.
- Utilize customer demographics to gain insight: Studying your customers' demographics can give you valuable information about their habits and likes, which can help you discover new opportunities and enhance existing products and services. By getting to know your target market, you can create more compelling promotions that will result in increased conversions.
- Increase ad effectiveness: Utilizing demographic data can help you pinpoint the most profitable sections of your target market and direct your marketing dollars accordingly.
Demographic appending services & API integration are an effective technique for companies attempting to gain insight into their target consumers and promote expansion.
Improve Marketing Campaign Performance
Accurate Append not only appends the highest possible quality of demographic attributes but just as important, appends the right information to the right person using our proprietary Right Party Algorithm.
Identify Common Attributes For Your Best Prospects and Customers
Accurate Append maintains an industry leading demographic database allowing our customers the highest possible quality of demographic attributes appended to their lists.
Expert Support and Advice
We specialize in deep, long-lasting support customized to your needs. Your success and growth are our business model, and we’re building the products and custom solutions to prove it.
Demographic Append - Frequently Asked Questions
Our demographic append service includes characteristics such as gender, age, year of birth, years in school and education level, estimated household income, modeled credit score range, head of household, presence of children, ethnic group, marital status, voter age demographics, length of residence, median home value, and homeownership indicator.
Our demographic append service can fit the criteria you have determined will result in a successful marketing campaign. We can provide data points covering demographics, financial information, and data enrichments such as job title and other professional information about your customer database. We can also help create “lookalikes” from our expanded database of U.S. consumers, giving you more potential customers to reach with your marketing efforts, including phone, email address, and direct mail outreach.
The typical match rate is 50%.
At part of our proven process, we will test a random selection of your data to determine match rate for various demographic append products. This test will give you deeper understanding and insight into the enhancements we can provide for your customer lists and database. Our team will then provide you with a detailed estimate for your desired products.
Contact our team today to get a free evaluation of your file and the products we can offer to improve your marketing efforts. You can use our U.S. consumer marketing database to grow your customer database, or start with postal addresses, email, and names and phone numbers from your existing lists.
Most files are processed in a matter of hours.
Yes, our demographic append service is an excellent source of US voter demographics and voter age demographics.
Data Append
Data Append Services to Fuel Your Organization's Growth
Our team of data experts is dedicated to your success. Join hundreds of businesses that trust Accurate Append for consumer data appending services for their sales and marketing projects.

What is a Data Append?
Why Choose Accurate Append For Data Appending?
- Our data appending services combine billions of data points from public records and premium partnerships, including changes of address, landline and mobile phones, emails, consumer preferences, dates of birth and more.
- Dun & Bradstreet found that one third of businesses have lost customers or renewals due to incomplete data. Our solutions help complete your data.
- We work with your lists to provide the most powerful and comprehensive solutions for your sales, marketing, and outreach needs. We offer quality, quantified.
- You can expect improved contact rates of 20% or more using our data append solutions.
- Reach customers and prospects accurately across more channels with phone, email, and postal address verification and appends.
- Get graded phone numbers and improve close rates.
Data Appends Save Time and Make Money
Accurate Append’s solutions are backed by decades of technology leadership and the best partnerships in the sector. We work with regulated industries, voter files, fundraising data and more — all in a secure environment with round-the-clock processing. We understand that every growing organization has different challenges that’s why all of our processes are customizable to your needs. Give us a call and get started today.
Call us at 888-979-9813 for a free consultation
Proven Data Append Services, Because You Need Results
Landline and Mobile
Phone Append
New Authoritative Data Source phones score and enhance your list with prioritized, verified numbers. We help you get more out of your calling campaigns.
Email
Append
With a database of 900 million emails and a triple-scrub process, we can refresh and enhance your lists for remarkable results.
Lead
Validation
Prioritize real leads and respond instantly with our real-time lead validation services. Validate, verify, and enhance your leads.
Expert Data Logistics for Your Success
We help growing businesses make the most of their time and resources by integrating the best data from the best sources using the best in today’s technology. Our premium processing and matching algorithms provide speed, accuracy, and security to every job. It’s quality, quantified.
Your One-Stop Shop for the Best Data
Real-time processing and tens of millions of updates each month give you the edge in your sales and marketing campaigns. We’ve developed proven partnerships to give you complete and timely results every time you run a file with us.
Self-Service, Secure Batch, API, and Custom Products
We can work with any file — including millions of records — and any format to provide the best results. Simply put, if you can send or upload your records, we can append them.
Lead Validation
Close More Sales and Grow Faster with our Lead Validation Services
Verify and enhance your leads in real-time and ensure that you’re following up with the prospects that matter most. Fill in contact details and add demographics and other customer attributes.
The Best Way to Ensure Lead Authenticity
Accurate Append’s lead validation is the most definitive tool available to solve the number one problem for online marketers – “is my lead good or bad?” Accurate Append will provide the answer in the form of actionable data in a matter of seconds.
Instantly Research Your Prospects
We’ll tell you whether an email address is real, and enhance incomplete leads by adding name, phone number, age, email address and U.S. postal address — from minimal or incomplete form data. Actionable customer intelligence, in seconds.
Expert Support and Advice
We specialize in deep, long-lasting support customized to your needs. Your success and growth are our business model, and we’re building the products and custom solutions to prove it.
Lead Validation & Enhancement Solutions
All solutions listed below are available 24/7/365 as a Batch Service or real-time API.
Email
Verification
Reduce bounces and flag spam and fraud. Verify your email addresses, in real time, before you act.
Lead
Validation
Validate, verify and enhance leads in real-time. Enhance your leads with fresh emails and phone numbers.
Demographic
Append
Use our demographic append API to enhance your database with demographic attributes.
Reverse Append
Discover full name and US postal address with as little as an email address or phone number.
Phone
Append
Append and score cell phone and landline quality with Authoritative Data Source phone append.
Email
Append
Append verified deliverable email addresses in real time with AccuSend email append.
Customized to Fuel Your Success
SOC 2 and HIPAA compliant, we offer custom solutions for regulated industry and fast-growing startups alike. Our proven technology stack supports customizations and quick deployment to accelerate your projects and campaigns.
Call us at 888-979-9813 for a free consultation

Easy Integrations
Integration is easy with RESTful architecture, full documentation and codes samples.
Available Where You Need It
Cloud based RESTful API interface or Batch Service can be accessed from anywhere.
Compare Our Results
With the highest possible uptime and fastest response times the service will always be available when you need it.
Top Data Logistics, Built for You
We combine the best available public data with curated, proprietary databases to give you the best, most reliable data possible.
Frequently Asked Questions About Lead Validation
Provide existing data using SFTP, our self-service platform, or real-time API and get back verification and additional fields based on your custom needs.
By verifying emails and phone numbers and adding additional information such as income information, you can ensure the accuracy and fit of a lead before reaching out by phone or adding lead information to your database.
Marketing and lead acquisition is one of an SMEs largest costs. By validating leads before investing sales time, you’ll not only reduce wasted time chasing poor-quality leads, you’ll gain the data you need to better target your marketing efforts.
Clients use our APIs and batch processes to verify emails and other contact information, and to supplement lead data with additional fields including contacts and demographic information.
With lead validation, you’ll quantify your marketing efforts. Straight North used an analysis of more than 373,000 inquiries to determine that 85% of customers converted on their first visit, while roughly 50-percent of “leads” were not sales inquiries. Lead validation gives you the data to successfully grow your sales and marketing efforts and invest in real returns.
Phone Append
Phone Appending Services & API That Increase Your Right-Party Connects
It’s simple: our phone enrichment services & API provide better phone numbers leading to more connects and more sales. Start with your leads list or customer database and get the industry’s best matches for landlines and mobiles.

What is a Phone Append?
How Do I Get Started?
- With Accurate Append, you can bring your own list, or start with ours using hundreds of audience-building criteria.
- Transfer your contacts file with the data points you have, such as name and address.
- Our processes integrate public and proprietary data from multiple sources to add, verify, and score matched numbers.
- We can work with just about any file to add new contact points.
- Our phone append & API services cover mobile and home phones, including grades based on how recent a number has been active.
- We can also start with phone number and use a “reverse phone append” to add additional information such as email addresses and even demographics.
Data Logistics You Can Trust for Your Phone Campaigns
Accurate Append is a technology company focused on service, responsiveness, and security. We make it easy to instantly understand your results and we offer free match report tests to quantify the data improvements you can expect when you partner with us.
Authoritative Data Source
You need to know you’re calling the right person, at the right number, that they are likely to answer. That’s ADS Phones — our new premium matching and scoring service for discerning marketers.
Dedicated to Your Success
We specialize in creating the best data solutions to match your needs. Our teammembers are trained in stacking products to get the very best results from your data.
Frequently Asked Questions About Phone Appending
In order to append the best phone numbers available we ask that you provide the following fields: full name, street address, city, state, and zip. Our service covers the United States.
Yes. We can provide the main landline for a business using a business’s name and mailing address.
We understand working with large data sets is complicated enough as it is, so our software safely appends phone numbers to the end of your record, keeping all of the other data in the file intact.
Pricing varies depending on the number of records in your job, the number of records for which we find matches and the types of enhancements that will best serve your project. Please contact our experts for a free analysis of your data and a detailed estimate.
Yes! We will take your list of phone numbers and append mailing address and other demographic information helpful to your campaign.
You may receive results in a matter of minutes after submitting your file for processing, depending on the size of your file. 90% of orders are completed the same business day.
Yes, we offer multiple phone append APIs. These APIs support standard phone append in addition to reverse phone append. More information is available on our API page.
Email Append
Email Appending Services & API That Boost Business
Instantly improve your campaigns with verified emails using our email append services & API. Reach prospects, donors, and voters with our trusted triple-scrub process and avoid email fails.

What is Email Appending?
How Do I Get Started?
- Bring your database or use ours: start with known contact info and add verified email addresses.
- Our email append technology runs your outreach file through three series of checks to provide deliverable emails most likely to reach the inboxes of your audience.
- Before delivery, we triple-scrub each email address to ensure maximum deliverability.
- Our email append API integrates with your systems for ongoing email enrichment.
- Have emails but no phone number or addresses? A “reverse e-mail append” can help complete your contact records and even add demographic information.
Remarkable Inbox Results
Our email append process ensures you get back only real, deliverable emails. We make it easy to get the results you want by avoiding addresses that could cause SPAM problems.
Up to 18 Million Updates a Month to get You the Best Matches
We provide dynamic results from a constantly updated database of nearly 1 billion email records. Your matches are verified as deliverable in real time.
Premier Support for Your Campaigns
We want your ongoing business and referrals — that’s why we offer every customer expert support and the custom data solutions and advice you need to succeed.
Frequently Asked Questions About Email Appending
Our technology processes pinpoint the right person and their current contact information. An older address is enough to start the process and help us find the maximum number of deliverable emails for the people in your audience.
There’s no need to reformat your file. We will add new information to the end of your records without disturbing its original format.
Yes, email verification is one of our services, and in many cases we can even add usable email addresses to records that come back as undeliverable. This service can be very helpful for updating your email database that hasn’t been used in some time, or where more and more addresses are bouncing.
Pricing is based on the size of your list and the details of your order. Our data experts can provide a free consultation and an analysis of your file with a detailed cost estimate.
You may receive results in a matter of minutes after submitting your file for processing, depending on the size of your file. 90% of orders are completed the same business day.
Yes! We will use your existing email address locate the matching name and postal address. We can also match landline and mobile phone numbers if needed for your campaign.
Email is the single largest channel to reach consumers online, with a reach twice as large as Facebook. Adding verified, contactable emails to your database means you can quickly and easily reach your customers and prospects using this cost-effective channel. The Direct Marketing Association estimates a 40x return on investment in email marketing and 80% of SMEs rely on email as their primary customer acquisition and retention channel.
Services
Is your data incomplete or outdated?
Our mission: As a contact data append solutions provider, Accurate Append helps businesses more efficiently connect with their customers and prospects.
Our Consumer Data Enhancement Solutions
The Best Data Append Solutions
We’ve worked with many industries to provide complete data append solutions – from real estate to home improvement to nonprofit fundraising. We’re happy to use our decades of experience in the data appending business to provide customized solutions for your data quality needs. We understand that every organization’s challenges are unique, so give us a call to see how our data can go to work for you.
Call us at 888-979-9813 for a free consultation

What is data appending?
- Your contact databases include incomplete and outdated entries.
- Our consumer databases include billions of data points on U.S. consumers, such as the best landline and cell phone numbers, email addresses, postal moves, and extensive demographic information, from dates of birth to interests.
- We’ll use proprietary algorithms to make a recipe that updates your data with the most complete information possible, based on your needs and specifications.