Data Append
Data Append Services to Fuel Your Organization's Growth
Join hundreds of businesses that trust Accurate Append for consumer data appending and complete contact appending services for their sales, marketing, and technology teams.
Our high-quality data append process sets us apart from other data appending companies. We make appending data easy, effective, and profitable. Get better ROI today with your sales & marketing data append.

What is a Data Append?
Why Choose Accurate Append For Data Appending?
With our Data Append API, you can fill in missing contact details while maintaining up-to-date, accurate customer records at scale and seamlessly built into your business processes.
- 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.
- Recent Dun & Bradstreet findings show approximately 1 in 5 businesses lose customers or renewal opportunities due to incomplete or inaccurate data. Enhancing your contact database with accurate, appended data can help prevent this.
- Our list appending services 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 match & append services.
- Reach customers and prospects accurately across more channels with full contact appending.
- Get graded phone numbers and improve close rates.
Why Choose Accurate Append For Your Data Appends?
Our Data Append services enrich your customer databases, ensuring they are comprehensive and current. Discover the key benefits and features designed to enhance your business operations:
- Rich Customer Profiles: Adds essential data elements to customer records, filling gaps and updating outdated information.
- Targeted Marketing Efforts: Enables more precise and effective marketing strategies by providing detailed customer insights.
Data Append Features:
- Comprehensive Data Enrichment: Expands your customer profiles with relevant data such as email addresses, demographic details, and behavioral insights.
- Accuracy and Relevance: Ensures the data appended is accurate, relevant, and up-to-date, maximizing the utility of your customer database.
Data Append Benefits:
- Enhanced Customer Segmentation: Allows for more accurate targeting by segmenting audiences based on detailed criteria, improving the effectiveness of marketing campaigns.
- Personalized Customer Engagement: Helps with customized marketing communications, leading to higher engagement rates and customer loyalty.
- Strategic Insights: Gain deeper insights into customer preferences and behavior, aiding in strategic marketing and product development.
- Improved ROI: By targeting the right audience with the right message, data append services help optimize marketing spend and improve overall return on investment.
Our Data Append services not only broaden the scope of your customer database by adding essential information but also enhance the quality of your data. This dual advantage ensures that your marketing and sales strategies are based on comprehensive and accurate customer insights, leading to improved targeting, engagement, and business growth.
Frequently Asked Questions About Data Appends
What is data appending?
Data appending is the process of enriching an existing database by adding missing or new information to enhance the accuracy and value of the database for targeted marketing efforts.
Why is data appending important in marketing?
Data appending is crucial for marketing because it enhances customer profiles, improves personalized marketing strategies, leads to better customer relationships, and can result in increased sales.
What are the steps involved in the data appending process?
The key steps in data appending include:
- Auditing your current database.
- Selecting a reliable data appending provider like Accurate Append.
- Matching your data with the provider’s database.
- Validating the accuracy of the appended data.
- Integrating the new data into your marketing tactics.
What are some best practices for data appending?
Best practices include:
- Regularly updating your database.
- Emphasizing data quality over quantity.
- Working with a reputable data append service like Accurate Append.
How do you choose a reputable data appending provider?
When choosing a data appending provider, look for one with a robust matching algorithm, high match rates, excellent reputation, and compliance with data protection regulations. Learn more about us here.
How often should you update your database with data appending?
You should update your database regularly, although the frequency depends on your business needs and the rate at which your data changes.
Can data appending help in understanding customer preferences?
Yes, data appending, particularly behavioral data appending, helps gain insights into customer preferences, which can inform more targeted and personalized marketing strategies.
What types of data can be appended?
Common append types include phone numbers, email addresses, postal information, demographics, firmographics, and behavioral attributes.
How much does data appending cost?
Data appending costs vary based on your list size, match rate, and the type of data you’re adding. Contact Accurate Append today to find out what works best for your goals.
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 to append lead data. 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 data match processes are customizable to your needs. Give us a call and start appending data today.
Proven Full Contact Data Appending Services
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, our list appending services provide 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 organizations make the most of their time and resources by helping them append data from the best sources using the best in today’s technology. Our data matching and append 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 Data Match and Append 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 data to them.
Phone Append
Phone Appending Services & API That Increase Your Right-Party Connects
Our industry-leading phone append services & API provide better phone numbers, leading to more connections and sales. Start with your leads list or customer database and get the industry’s best matches for landlines and mobiles.

What are Phone Append Services?
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.
- Our contact appending services can work with just about any file to add new data.
- Our Phone Append & API services cover mobile and home phones, including grades based on how recent a number has been active.
- Using our Reverse Phone Append service, we can take a phone number 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 contact appending 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 build data solutions that align with your goals. By stacking the right services, our team helps unlock the full potential of your records, so you get sharper insights and better outcomes.
Why Pick Accurate Append For Your Phone Appends?
Our Phone Appending services are designed to upgrade your customer data with precision. Explore the key features and discover how we can give your business an edge.
- Complete and Current Contact Details: Adds current phone numbers to customer records, making your database complete and up-to-date.
- Effective Communication: Ensures precise targeting and engagement, improving the reach and effectiveness of marketing campaigns.
Phone Append Features:
- Data Matching: Compares your data against an extensive, updated database to find matching current phone numbers.
- Verification: Confirms that numbers are active and correctly matched to individuals, enhancing accuracy.
- Improved Contactability: Significantly reduces undelivered messages by updating old and incorrect numbers.
Phone Append Benefits:
- Enhanced Customer Targeting: Align phone numbers with customer profiles for accurate audience segmentation, allowing for personalized marketing strategies.
- Increased Conversion Rates: Tailored communication drives higher engagement and conversion rates.
- Personalized Interaction: Updated contacts enable personalized communication, building trust and fostering stronger customer relationships.
- Immediate Feedback: Offers a direct line to customers for quick feedback on products or services, leading to faster sales.
Our Phone Appending services expand your reach by increasing the number of contactable customers and significantly improving the quality of these contacts. These services ensure your marketing campaigns are efficiently targeted and more effective, directly improving your bottom line.
Frequently Asked Questions About Phone Appending
What is phone appending?
Phone appending is the process of updating missing or outdated phone numbers in a customer database to improve communication and marketing efforts.
How does phone appending benefit a contact list?
It enhances the list by increasing contactability, reducing undeliverable messages, and improving the effectiveness of telemarketing campaigns.
Why is improved customer targeting important?
Improved customer targeting allows businesses to execute more focused campaigns and gather direct feedback, leading to better marketing results.
What is the impact of phone appending on customer communication?
Phone appending allows for personalized interaction, immediate feedback, and a direct line to the customer base, improving overall communication.
Can phone appending enhance both the quantity and quality of contacts?
Yes, phone appending not only increases the number of reachable contacts but also enhances the quality of interactions for more effective targeting and feedback.
Can I append both mobile and landline numbers?
Yes, landline and mobile numbers are included in our phone append services.
How much does phone appending cost?
Pricing varies based on your list size, match rate, and the type of numbers needed. Contact Accurate Append today to get custom pricing that works for you.
Services
Is your data incomplete or outdated?
As a U.S. consumer 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.

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.