DatazappAppend cell phones or landlines for 3 cents each.
Upload your mailing list and append matching mobile and/or landline phone numbers for as little as $0.03 per match. DataZapp’s self-service platform makes it easy to enrich your data, review match results, and download your completed file quickly.
Every list is different. Here are real match examples from DataZapp customers — actual cell and landline match rates across different list sizes.
Already sending mailers to your prospect list? Take it further — append cell and phone numbers to those same records and open a direct line of communication. A complete prospect profile helps your sales team reach out through multiple channels, follow up faster, and convert more leads into customers.
Those old mailing lists sitting on your hard drive may be worth more than you think. Append fresh phone numbers to existing records and launch a cost-effective telemarketing or SMS campaign — no new list purchase needed.
Insurance agents, mortgage brokers, and home improvement companies often have lapsed customers who already know their brand. A quick phone append gives you the direct line to reconnect, run targeted win-back campaigns, and recover revenue you thought was gone.
Incomplete contact data kills conversions. DataZapp appends the best available cell or landline to each record — and our real-time Phone Append API can plug directly into your CRM, inquiry form, or platform so every new lead is phone-complete the moment they submit.
Whether you are re-engaging dormant contacts, reactivating lapsed customers, or converting prospects from past campaigns, the size and accuracy of your custom audience depends on how complete your contact data is. Most advertisers upload email-only lists and accept a 30–50% platform match rate without realizing what they are leaving behind.
By appending verified cell phone numbers and mobile numbers before upload, you give platforms like Meta, Google Customer Match, TikTok, and Snapchat a second — often stronger — matching signal. More matched records can mean larger retargeting audiences, better lookalike seeds, and lower cost-per-match across paid channels.
DataZapp’s Phone Append API lets developers enrich records programmatically with available cell phones, landlines, or both. Use it to complete lead records inside your CRM, intake form, data platform, marketing workflow, or customer database.
{
"AppendModule": "PhoneAppendAPI",
"AppendType": 3,
"DncFlag": "false",
"Data": [
{
"FirstName": "John",
"LastName": "Doe",
"Address": "123 Main St",
"City": "Anytown",
"Zip": "12345"
}
]
}Phone Append is a data enrichment service that adds matching mobile and/or landline phone numbers to your customer or prospect mailing lists using names and addresses from your CSV, TXT, or Excel files.
Adding phones to your list enables you to do telemarketing, SMS, create custom audiences on social media, etc. for the purpose of customer acquisition or retention.
The most common are consumer phone appends & business phone appends. We also offer a Reverse Phone Append service, which takes phone records and appends matching name, address and even Emails.
Our phone accuracy ranges from 75% to 85%. Our proprietary phone append algorithm appends phones at the individual level but also performs a second pass at the household level.
Most appends submitted on our 24/7 online platform turn-around in under 10 minutes.
You will receive a no-obligation match analysis for every list uploaded. Create an account and upload your file to view a detailed match report.
Yes - We can append owner names, phones, & emails to address-only files using authoritative public property and homeowner data sources.
See how to add Phones to your postal records.
See how to add postal data to your Phone records.
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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