DataZapp’s Address Append service helps marketers connect with prospects & customers faster using highly accurate postal data.
Use DataZapp's Reverse Email Append and/or Reverse Phone Append services to reach home owners, residents, & other addressees. Send direct-mail or simply understand the geographic make-up of your contacts.
USPS-deliverable postal addresses processed through CASS/NCOA.
We can derive Addresses from Emails, Phones, Partial Addresses and/or Company info.
Boost outreach performance and generate more conversations.

From small batches to large volume bulk appends - DataZapp delivers names & addresses with no subscriptions, contracts, or surprise fees. Our pay-as-you-go minimum order is $125 — enough to process about 4,000 records.
Estimate your order cost →Pull data at your own pace with no contracts or commitments.
Pre-pay to unlock better skip tracing rates & avoid the $125 minimum.
Only pay for matched records. $125 minimum unless you pre-pay.
You'll get a quote for each skip trace job. No obligation to purchase.
Appending mailing addresses doesn't just unlock postcard and letter campaigns. A complete postal address can improve customer intelligence, support better segmentation, enrich your CRM, and enable more personalized outreach across multiple marketing channels.
Understand where your contacts live and segment your audience by city, ZIP Code, county, state, metro area, or region. Create localized campaigns, analyze geographic trends, and tailor offers to each market.
Complete customer profiles with verified mailing addresses to improve account management, identity resolution, duplicate matching, territory assignments, and future data enrichment such as homeowner insights, demographics, and property information.
Reach contacts who lack mailing addresses with postcards, catalogs, fundraising appeals, renewal notices, promotions, and other high-performing direct mail campaigns. Postal append helps turn incomplete records into marketable prospects.
Have questions about our data, pricing, or custom solutions? Drop us a line. Our team typically responds within an hour during business hours.
555 W Granada Blvd. Suite G6,
Ormond Beach, FL 32174
9 AM EST to 6 PM EST
DataZapp’s Address Append API lets developers enrich records programmatically with available name, address, city, state, & zip code. Use it to complete lead records inside your CRM, intake form, data platform, marketing workflow, or customer database.
{
"AppendModule": "EncryptedEmailAppendAPI",
"AppendType": 5,
"Data": [
{
"FirstName": "John",
"LastName": "Doe",
"Address": "123 Main St",
"City": "Anytown",
"Zip": "12345"
}
]
}Add Email addresses to your contacts.
Add Demographic & Behavioral data points to your contacts.
Add Names, Address, even Emails to your Phone records.
Flag or Remove Do-Not-Contact & other undesirable phone numbers.











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