Phone Append Services
Verified Consumer Phone Data and Telephone Appending
Append phone numbers to your consumer records with up to 90% match rates from 700M+ verified records. Our phone append services identify Mobile vs. Landline types with precision. High-volume data enrichment starting at just $0.02 per match.
Phones
Consumers
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PROVEN TRACK RECORD
Stop Losing Customers to Disconnected Phone Numbers
Data decay is silent but deadly for your ROI. Every year, roughly 20% of phone numbers are reassigned or disconnected. If you are using legacy providers, you aren’t just wasting time — you’re losing money and the ability to reach your customers.
The TDG Difference: The Data Group provides the most accurate phone number append solution by combining massive scale with “Forensic Verification”. We don’t just append phone numbers — we validate the identity behind each number, ensuring your outreach connects with the right person, every time.
Our Proprietary Phone Appending Services Workflow
Our phone appending workflow goes far beyond basic matching. While most providers deliver recycled numbers and outdated records, our forensic process ensures every appended number is current, verified, and identity-confirmed.
Step 1 — Identity Linkage & Fuzzy Matching
As part of our telephone number appending process, we match your list against our 700M+ records. With millions of daily updates, we ensure you receive the freshest data available.
Step 2 — Line Type Intelligence (The Compliance Shield)
Unlike basic providers, our phone appending services provide granular “Line Type” data. We distinguish between Mobile, Landline, and VoIP in real-time. This is essential for optimizing your SMS vs. Voice strategies.
Step 3 — Verification & Output
Every record is cross-referenced against massive Telco databases including recent number reassignment and porting. You receive a clean, verified file ready for use.
What Makes Our Data Better?
Our team of experts leverages cutting-edge technology and extensive industry experience to provide comprehensive data solutions tailored to your business needs. We manage over 500 million Mobile Ad IDs and 1 billion privacy-compliant emails, ensuring your data is robust and reliable.
100%
Free data test
Try our data services risk-free with a complimentary data quality test before committing.
24/7
Personalized support
$0.02
For one record
Affordable data enhancement at just $0.02 per record, maximizing your marketing ROI.
The team at The Data Group always provides us with great data and great customer service.
National Ford Dealer
We have worked with The Data Group for over 15 years and they are our go to for high-quality data.
Marketing Agency
90%
Match rates
Trust our services to deliver up to 90% match rates, guaranteeing highly accurate customer data.
Phone Types & Data Coverage
Mobile, Landline & Cell Phone Append: Complete Phone Data Coverage
- Mobile/Cell Phones: These are our most requested hits for a reason. They are ideal for SMS campaigns and immediate consumer engagement where speed is everything.
- Landlines: They remain a vital touchpoint for reaching specific demographics, such as rural households or senior donors.
- VoIP Numbers: We identify and flag these clearly so you can maintain compliance and avoid the technical hurdles or deliverability issues often associated with digital lines.
- Verified Phone Numbers: The Data Group cross-checks every number against Telco databases to confirm active status and eliminate wasted outreach.
- Data Delivered: You get the phone number plus its specific line type. This means you’re getting the clarity needed to decide whether to text, call, or mail.
What Sectors We Serve
Nonprofit Fundraising
01
Don’t let your “Major Gift” prospects slip through the cracks. Use our services to append phone numbers to donor databases for personalized outreach and SMS stewardship.
Voter Data & Political Campaigns
02
In election cycles, every second counts. Our phone number appending services offer speed and precision for effective voter mobilization.
Retail & Consumer Marketing
03
Reach catalog buyers, lapsed subscribers, and inactive loyalty members through SMS and voice outreach. Reactivate dormant accounts with mobile phone append for customers inactive 12+ months.
Insurance & Financial Services
04
Keep your policyholders connected and informed. TDG’s phone append services help you reach customers for policy renewals, claims follow-up, and cross-sell opportunities. Having verified, up-to-date contacts ensures your messages land in the right hands every single time!
Combined Phone & Email Append
Phone and Email Append Services: Complete Contact Enrichment
Why settle for partial data when you can have it all? TDG’s phone and email append services enrich your customer records with both verified phone numbers and email addresses in one streamlined batch. It’s fast, reliable, and just $0.02 per match per channel, giving you the complete contact picture every time.
Check out our Email Append page to learn more.
Transparent Phone Append Cost Without Hidden Fees
Why pay $0.05 or $0.10 per match with middlemen? As a direct data source, The Data Group offers the best phone append service value:
- Performance-Based: No Match, No Pay.
- Batch phone append services: Starting at $0.02 per match.
- Phone append API: Real-time subscriptions tailored to your monthly volume.
Expert Technical Support.
When you have a question about our phone number appending services, you speak to a data expert.
Industry Articles and News
Business Email Append for Consumer Companies: What It Is, How It Works, and Why It Matters
Read More »Related Services
Related Data Append Services
Turn a disconnected 10-digit number into a complete profile. This service works backward to find the owner’s full name and current postal address so you can reach your audience through more than just a phone call.
Email Append
Fill the gaps in your database by adding verified personal email addresses to your existing consumer records. It is the fastest way to expand your digital reach and connect with customers on the platforms they use every day.
Email Validation
Protect your sender reputation by cleaning your list before you hit send. This tool checks your existing email data for bounces and inactive accounts to ensure your campaigns land in the inbox.
Demographic Append
Move beyond basic contact info by layering in high-value details like age, household income, and homeowner status. These insights allow you to segment your audience and tailor your messaging to their specific lifestyle.
Data Append Hub
Looking for something else? Explore our full suite of enrichment tools and see how our massive database can help you build more actionable consumer profiles in one central location.
Phone Append Services FAQs
What is a phone append or telephone append service?
It is a data enrichment process that adds missing phone numbers to your existing customer database based on names and addresses.
How do you ensure the best phone append match rates?
We use a multi-source validation engine that refreshes millions of records daily. We typically achieve 70–90%.
Are your phone append services TCPA compliant?
Having accurate phone numbers and frequent verification assists in TCPA compliance. We identify Line Types (Mobile vs. Landline) to provide you with the necessary signals for a safe dialing strategy.
What is the difference between forward and reverse phone append?
Forward append adds a phone number to a name/address. Reverse phone append takes a phone number and finds the owner’s name and address.
What is the typical phone append cost?
Our rates are volume-based, starting at $0.02 per match. We are a direct data source.
How fast is the batch phone appending services process?
Most files are returned in less than an hour. Our automated system is built for the same-day processing of files of any size.
Can I test your phone append service for free?
Yes. We offer a free match test of up to 100 records.
What types of phone numbers can you append?
We append mobile/cell, landline, and VoIP numbers, all tagged with line type identifiers so you know whether to reach out via SMS, voice, or mail. Given the shift in communication, cell phone append remains our most popular request for brands looking to stay connected with their consumers.
Can you append both phone numbers and email addresses?
Absolutely. Many of our clients prefer phone and email append services to build a true multi-channel strategy. We can enrich your consumer records with both contact points in a single batch, providing a cost-effective way to scale your outreach at just $0.02 per match.
What are phone number appending services?
Phone number appending services match your customer names and addresses against verified databases to fill in missing phone numbers. Phone number appending services from TDG leverage over 700M records and daily updates to deliver active, current numbers with match rates reaching as high as 90%.
Ready to Test the Best Phone Append Service?
