Validation Checks
- Format — Correct number of digits, valid area code
- Assignment — Number is assigned in carrier database (NPAC)
- Line Type — Wireless, landline, VoIP, or toll-free
- Carrier — Which company serves this number
Try Phone Validator
API example:
curl -X POST https://api-service.verirouteintel.io/api/v1/lrn \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"phone_number": "15551234567"}'
# Response:
{
"data": {
"phone_number": "15551234567",
"lrn": "5551230000",
"carrier": "Verizon Wireless"
},
"success": true
}Why Validate Phone Numbers?
Improve Contact Rates
10-25% of phone lists contain invalid numbers. Removing them improves:
- Contact rates by 20-50%
- Agent productivity
- Campaign ROI
Reduce Costs
Don't pay to dial numbers that can't connect:
- Save on per-call/SMS costs
- Reduce wasted agent time
- Improve cost per contact
Better Data Quality
Keep your CRM clean:
- Flag invalid numbers at entry
- Identify stale records
- Track data quality over time
Bulk Phone Validation
Validate entire contact lists efficiently:
- Upload CSV — Submit your phone list
- Preview Results — See validation stats before paying
- Process — Validate all numbers
- Download — Get enriched CSV with validity status
Email notification when your batch completes.
When to Validate
- At entry — Validate during form submission
- Before campaigns — Clean lists before outreach
- Periodically — Re-validate every 90 days
- On import — Validate purchased/imported lists
Need API Access?
- NPAC-verified number assignment — not just format checking, but confirming the number exists in carrier databases
- Returns carrier, line type, ported status, and activation date at $0.0005 per lookup
- Bulk upload for validating contact lists of any size before campaigns launch
Phone Validator — FAQ
What makes a phone number valid according to NPAC?
A phone number is considered NPAC-valid when it is assigned to an active carrier in the Number Portability Administration Center database. This means the number has been provisioned to a real carrier and is capable of receiving calls or messages. Format-only validation (checking digit count and area code) misses unassigned or recycled numbers that are in NPAC format but don't route to anyone.
How often should I re-validate my phone number list?
Re-validate contact lists every 90 days. Numbers are released and reassigned regularly — industry estimates suggest 35 million US numbers are recycled each year. A number that was valid and assigned to your customer six months ago may now belong to a different person, creating both deliverability and TCPA compliance risk.
Can I validate international numbers with the VRI API?
The VRI LRN API is optimized for US (NANP) phone numbers. For international numbers, the API validates format and structure but cannot perform NPAC database lookups, which are specific to the US number portability system. For international validation, use E.164 format checking as a first-pass filter.