Line Types Detected
| Line Type | SMS Capable | Fraud Risk | Notes |
|---|---|---|---|
| Wireless | Yes | Lower | Mobile phones, best for SMS |
| Landline | Limited | Lower | Voice calls preferred |
| VoIP | Varies | Higher | Internet-based, variable SMS |
| Toll-free | If enabled | Low | Business numbers |
Try Line Type Checker
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 Line Type Matters
SMS Delivery
Don't send SMS to numbers that can't receive them:
- Wireless — Send SMS freely
- Landline — SMS converted to voice (poor experience)
- VoIP — Check if SMS-enabled before sending
Fraud Prevention
VoIP numbers are commonly used in fraud because they're:
- Easy to obtain without ID
- Disposable (abandon after use)
- Not tied to physical location
Contact Strategy
Match your outreach to the phone type:
- Wireless — Text, then call during day
- Landline — Call during evenings
- VoIP — May be business, call during work hours
Bulk Line Type Checking
Check line type for entire contact lists:
- Upload CSV with phone numbers
- Get line_type for each number
- Segment lists by type
- Filter landlines from SMS campaigns
Check Line Types
Identify wireless vs. landline vs. VoIP for any number.