Look up any US or Canada phone number to instantly determine its validity, line type, carrier, DNC status, and geographic data — the information you need before every outbound contact.
What a US Phone Number Lookup Returns
A single lookup via phone-validator.us returns a complete data set for any US or Canada number:
Valid & Active Status
Confirms the number exists in a carrier database and is currently in service. Disconnected and invalid numbers return
Confirms the number exists in a carrier database and is currently in service. Disconnected and invalid numbers return
active: false. Line Type
Mobile, Landline, VoIP, Toll-Free, Prepaid, or Unknown. Critical for TCPA compliance — autodialed calls and texts to mobile numbers have stricter consent requirements.
Mobile, Landline, VoIP, Toll-Free, Prepaid, or Unknown. Critical for TCPA compliance — autodialed calls and texts to mobile numbers have stricter consent requirements.
Current Carrier & Portability
The carrier currently holding the number, plus whether the number has been ported from another carrier. Porting is detected automatically.
The carrier currently holding the number, plus whether the number has been ported from another carrier. Porting is detected automatically.
Federal DNC Status
Whether the number is registered on the FTC Do Not Call list. Returns
Whether the number is registered on the FTC Do Not Call list. Returns
dnc: true/false for easy automated suppression.
TCPA Litigant Flag
Identifies numbers associated with known TCPA professional plaintiffs. Returned as
Identifies numbers associated with known TCPA professional plaintiffs. Returned as
tcpa_litigant: true/false. Geographic Data
City, State, ZIP code, and Time Zone derived from the number’s area code and prefix. Useful for call scheduling and regional segmentation.
City, State, ZIP code, and Time Zone derived from the number’s area code and prefix. Useful for call scheduling and regional segmentation.
How to Look Up a US Phone Number
- Single lookup — Enter any number into the validator above. Any format is accepted: (555) 123-4567, 5551234567, or +15551234567.
- Bulk CSV lookup — Upload a CSV file with up to 50,000 numbers. Results are returned as a downloadable file with all data fields appended.
- API lookup — Call the REST API endpoint with your number and API credentials. Returns JSON in under 1 second. Supports all US and Canada numbers.
Phone Number Lookup vs Reverse Phone Lookup
These are commonly confused but serve different purposes:
| Feature | Phone Validation (this service) | Reverse Phone Lookup |
|---|---|---|
| Returns owner name | No | Yes |
| Returns personal address | No | Yes |
| Checks active status | Yes | Rarely |
| Returns line type | Yes | Rarely |
| DNC check | Yes | No |
| TCPA litigant flag | Yes | No |
| Best for | TCPA compliance, campaign cleaning, fraud prevention | Identifying unknown callers |
When You Need a US Phone Number Lookup
- Before an outbound calling campaign — remove disconnected numbers and DNC registrations
- Before sending SMS — confirm the number is mobile (not landline or VoIP)
- At web form capture — reject invalid numbers before they enter your CRM
- CRM hygiene — quarterly batch re-validation to catch numbers that have disconnected or been ported
- Fraud prevention — flag VoIP numbers that are commonly used in synthetic identity fraud
- Call scheduling — use the time zone data to ensure you only call during permitted hours
Look Up Your First 1,000 Numbers Free
No credit card. Full results including line type, carrier, DNC, and TCPA litigant flag.