Why Choose Accurate Append For Marketing Lists?


Industry Leading Contact Data Accuracy

Verified Phone Numbers, Physical & Email Addresses

Add Demographics, Income, Donation History & More

Millions of Consumers in Our Database

Build Mailing Lists By Zip Code, Age, Political & More

Need Direct Mail 
or 
Telemarketing Lists?

Expert designers and digital talent are ready to complete your projects.

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Email Appending

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. 

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. 

List Building Data Features

Phone Appending

Our phone append 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. 

Address Appending

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. 

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1000+ Companies Trust Accurate Append

About Accurate Append

18+ million updates per month to keep your data accurate and complete.

Superior Data Services

Proven Data Products and APIs

Use our proven data products to grow your business or work with our team to create something custom.

Located in Bellevue, Washington

We're responsive at all levels. Located in the USA, we're just a quick phone call or email away.

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At Accurate Append, our core values drive company growth and service. We deliver superior consumer data services to exceed our customer's expectations. With 45+ years of data experience, we live and breathe data.

Perfect for Telemarketing & Direct Mail Marketing

45+ Years of Data Expertise

Rated A+ by the Better Business Bureau