U.S. mobile and landline phone records tied to name and address, with quality and extended tiers, for append, verification, and outreach programs.
Since 2018
Privacy-safe enterprise data
VOSB & SDVOSB
U.S. Veteran-Owned, Service-Disabled
SCC Transfers
EU/UK/CH per privacy policy
GDPR · CCPA · CPRA
Consent-first data sourcing
Overview
GSDSI licenses U.S. phone files in two lines. The mobile file carries 141M records in a quality tier and 340M in an extended tier, with name, cell number, address, and carrier. The landline file carries 120.5M quality records and 320M extended records with name, landline number, and address. The quality tier is the tighter selection; the extended tier trades some precision for reach. Both are refreshed quarterly and are used to append phone numbers to customer files, improve contact coverage, and build direct-response audiences.
Need an API key + JSON sample?
For technical evaluation, we can provide a sample payload, schema notes, and delivery options (S3/SFTP/Snowflake) aligned to your workflow.
A representative slice of the Phone & Mobile Contact Data schema. The data dictionary shared during evaluation lists every field with its type, nullability, join keys, and refresh cadence.
Field
What it contains
full_name
Name associated with the phone record.
phone
Cell or landline number, depending on the file.
postal_address
Address associated with the record.
carrier
Wireless carrier, on the mobile file.
Quality and Extended Tiers
Each phone file is offered in two tiers. The quality tier is the narrower selection, suited to programs where connect rate matters most. The extended tier is the full reach file, suited to matching against large customer lists where coverage matters most. Counts for each tier are stated on this page as of the master catalog read on 2026-11-10 and are refreshed quarterly.
Common Applications for Phone Data
Brands append phone numbers to customer records that have a name and address but no number. Contact centers and field teams use the files to reach households by phone. Data teams use phone as one more match key when linking records across files. Pair phone data with the Core Email File and the Consumer Data File to build a complete contact record for each person.
Permitted Use and Channel Rules
This is marketing data, not consumer-report data, and it must not be used for credit, employment, insurance eligibility, or tenant screening. Calling and texting are regulated by federal and state law, including consent and do-not-call rules, and the buyer is responsible for those obligations in its own outreach. Contact GSDSI to discuss licensing terms and permitted channels before activation.
Frequently asked questions about Phone & Mobile Contact Data
What phone data does GSDSI license?▾
U.S. mobile and landline files linked to name and address. The mobile file also carries the wireless carrier.
How large are the files?▾
The mobile file has 141M records in the quality tier and 340M in the extended tier. The landline file has 120.5M quality records and 320M extended records, as read from the master catalog on 2026-11-10.
What is the difference between quality and extended?▾
The quality tier is the narrower selection for programs where connect rate matters most. The extended tier is the full reach file for matching against large customer lists.
How often is it refreshed?▾
Quarterly.
Are there limits on how I can use phone data?▾
Yes. It is marketing data, not consumer-report data, so it cannot be used for credit, employment, insurance eligibility, or tenant screening. Calling and texting are regulated, and the buyer is responsible for consent and do-not-call obligations in its own outreach.
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