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Phone append matches your customer records against a database of 700M+ verified phone numbers to add a current, accurate mobile or landline number to each record — helping you reach customers by call or text who you previously could only contact by mail.
Consumer Phone Append

Complete Your Records With Verified Phone Numbers

Already have customer names and addresses? Enrich your existing records by matching them against 700M+ verified consumer identities and appending validated mobile and residential phone numbers.

Up to a 90% match rate, 20 million records updated daily, and pricing from just $0.02 per matched record — with every number clearly labeled mobile or residential.

$0.02 Per Match  |  Mobile & Landline Labeled 

Get your free data test

Preview your match rate before you commit – no obligation

TRUSTED BY DATA TEAMS AT

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Built for High-Volume Data

Verified Consumer Numbers, Validated at Scale

THE DATA BEHIND OUR RESULTS
700M+

Verified consumer identities

90%

Match rate

20M

Daily Updates

$0.02

Per matched record

WHY Append Phone Numbers

Where Telephone Appending Improves Reach

Missing phone numbers reduce the value of the customer data you already own. Filling those gaps reconnects you with more customers.

Reconnect With Customers

Find current numbers for people already in your database so calls and texts don’t stall on stale records.

Recover Mobile Reach

Identify mobile numbers for SMS updates, flash sales, appointment reminders, and winback campaigns.

Separate Number Types

Distinguish mobile and landline records so your team picks the right channel and avoids mismatched outreach.

Reduce Wasted Spend

Spend less time dialing disconnected numbers or mailing consumers you could reach faster by phone.

HOW IT WORKS

Our Three-Step Appending Process

Enrich existing records without changing your current workflow — both API and batch processing available

1

Securely Send Your File

Upload your incomplete list through our secure transfer. We match on names, emails, or mailing addresses to maximize success.

2

We Match Your Records

We compare your file against verified consumer records and validate every potential match before delivery.

3

Receive Your Updated File

Get a structured file with every number labeled mobile or landline — ready to import into your CRM or marketing platform.

Why We're the Best for Volume Data

A Tailored Match Strategy, Not One-Size-Fits-All

Before processing begins, we review each file to determine the matching strategy most likely to produce accurate results — improving match quality while ensuring the returned data fits your existing systems.

Every project is handled through a managed process. There’s no software to install, both API and batch processing available, and no changes required to your CRM workflow.

Permission-Based, Legally Sourced

Every number comes from permission-based records — never scraped or unverified listings.

Secure File Handling

Access is limited to authorized personnel, and project data is removed once processing is complete.

Same Day Processing

Files within minutes/hours

Choosing a Provider

What to Ask Before You Commit

High match rates don’t always translate into usable data. These questions help you look beyond advertised percentages.

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Can you show match quality?

Ask for sample results alongside estimated match rates. Reviewing actual appended records tells you far more than a percentage alone. We offer a free Data Test so you can preview your match potential before getting started.

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Do you classify number types?

Confirm the returned file identifies each number as mobile or residential landline. Number type helps you organize records, choose the right channel, and assists with compliance requirements for different outreach methods.

The team at The Data Group always provides us with great data and great customer service.

National Ford Dealer

100% FREE · NO OBLIGATION

See How Many Phone Numbers We Can Match

Upload a sample of your file and we’ll estimate your match rate before you commit. You’ll see how many records we can match — and exactly what the returned data looks like.

Simple, Transparent pricing

Just $0.02 Per Match — or $20 per 1,000

You only pay for records we successfully match and validate. No setup fees, no long-term contracts.

Flat-Rate Append

$0.02 / matched record

That's $20 per 1,000 matches — you're never charged for records we can't match.

Mobile & landline clearly labeled
Every match validated before delivery
Built for high-volume files
No setup fees or contracts
Start Your $0.02/Match Test

Estimate Your Cost

Estimate assumes a 90% match rate. You only pay for validated matches, so real cost may vary.

Estimated cost

$1,800.00

for 90,000 matched records at $0.02 each

Calculate Your Exact Cost

Every validated match expands the customers your team can reach — without rebuilding or repurchasing your database.

Industries we Serve

Who Puts Phone Append to Work

Retail & Ecommerce01

Recover mobile numbers for SMS promotions, flash sales, and cart-recovery texts that reconnect past buyers.

Healthcare02

Reach patients with appointment reminders and service updates through the right voice or text channel.

Nonprofits & Fundraising03

Reconnect with donors and supporters by phone to strengthen outreach and boost campaign response.

Financial & Direct Marketers04

Empower call centers and service teams to reach consumers through validated voice campaigns at scale.

Append Vs. Reverse Append

Two Services, Two Starting Points

Both ensure your records match the real person on the other end — they just start from opposite ends.

Service
What you start with
What you get
Best for
Phone Append
Name, email, or address
Matched mobile / landline number
Records missing a phone number
Reverse Phone Append
An unknown phone number
The person & details behind it
Identifying who a number belongs to

Forward appending starts with consumer info to find a missing phone; reverse phone append starts with a number to identify the person behind it.

Phone Append FAQS

Understanding Consumer Phone Append

Phone appending is the process of adding missing phone numbers to your existing consumer database. It matches the customer information you already have — names, email addresses, or mailing addresses — against a verified consumer database to append mobile or residential phone numbers to eligible records.

Appending phone numbers gets more value from your existing customer data by filling in missing contact information. A more complete database supports better outreach, improves campaign reach, reduces reliance on outdated records, and gives your team additional ways to connect through calls or SMS when mobile numbers are available.

It takes the contact details you already have — a name, email, or physical address — and matches them against verified databases to find and add the correct consumer phone number to that record, all while maintaining high data quality.

Yes. A quality service can pull both mobile and landline numbers. We flag each matched record as mobile or landline so you know whether you’re setting up an SMS campaign or a traditional call outreach.

Yes, provided you work with a provider that takes compliance seriously. We stick to strictly verified, legally sourced records and follow CCPA, GDPR, and CAN-SPAM requirements to handle customer data securely throughout every project.

Forward phone appending starts with consumer information (like an email or address) to find a missing phone number. Reverse phone append starts with an unknown phone number to identify the person behind it. Both ensure your records match the real person on the other end.

Yes. We offer a free Data Test so you can review your potential match rate before placing an order. It previews how many records we can match and helps you evaluate the value of the service before processing your full file.

Yes. We can append phone numbers to files containing mailing addresses. Additional information such as names or email addresses improves match potential, but address-based matching is supported for many consumer records.

We match your records against 700M+ verified consumer records and validate appended phone numbers before delivery. We offer a match rate of up to 90% using verified, permission-based data.

We charge $0.02 per match — or $20 per 1,000 matches. You only pay for records we successfully match and validate.

Related SErvices

Complete Your Consumer Profiles

Phone is one piece of the record. Append, reverse-match, and enrich in a single project.

Reverse Phone Append

Start with an unknown number and identify the consumer behind it.

$0.02 / match

Email Append

Add verified, opt-in email addresses to your consumer records.

$0.02 / match

Data Verification

Confirm and standardize your records against live sources.

$0.02 / record

Demographic Append

Layer in demographics and lifestyle attributes for targeting.

$0.02 / record

TCPA Scrub

Check numbers against litigator and DNC lists before you dial.

$0.03 / lookup

Phone Append API

Append and validate phone numbers in real time as leads arrive.

$0.02 / lookup

Ready to Complete Your Customer Records?

Start with a free data test. See your match rate, know your cost, then decide — no obligation, no contract.

API