Carrier Data Provided
- Carrier Name — Verizon, AT&T, T-Mobile, etc. For programmatic carrier and messaging provider identification, see the Messaging Provider API.
- OCN — Operating Company Number (unique carrier ID)
- LRN — Local Routing Number. VRI Enhanced LRN adds port timestamps and line type — query it via API at $0.0005/lookup.
- Ported Status — Whether number has been ported
- LRN Activation Date — When last ported (exclusive)
- Line Type — Wireless, landline, VoIP
Try Carrier Lookup
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 Carrier Lookup?
30%+ of Numbers Are Ported
You can't trust area codes to identify carriers. Over 30% of US numbers have been ported to different carriers. Only LRN lookup from NPAC gives accurate carrier data.
Call Routing
Route calls through the correct carrier paths for:
- Least-cost routing
- Better call quality
- Accurate billing
SMS Delivery
Knowing the carrier helps optimize SMS delivery. Verify caller names in bulk with the VRI CNAM API.
- Route through appropriate gateways
- Handle carrier-specific filtering
- Improve deliverability
Exclusive: LRN Activation Date
VeriRoute Intel is the only service that provides LRN Activation Date — when a number was last ported. This helps:
- Detect SIM swap fraud
- Identify reassigned numbers
- Assess trust based on carrier tenure
Included free with every carrier lookup.
Bulk Carrier Lookup
Look up carriers for entire contact lists:
- Upload CSV
- Preview results before paying
- Download enriched data
Need API Access?
This tool runs one lookup at a time. The VRI API supports bulk and programmatic lookups via REST and GraphQL — query millions of numbers automatically, integrate results directly into your platform, and pay only for what you use. Starting at $0.0005 per lookup with no minimum commit.
- NPAC-sourced carrier data accurate for ported numbers — not just area code guessing
- Carrier name, OCN, LRN, line type, and activation date in one $0.0005 query
- Bulk CSV upload available — validate full contact lists before outreach
Carrier Lookup API — FAQ
How accurate is carrier lookup data for ported numbers?
VRI sources carrier data from NPAC (the Number Portability Administration Center), the authoritative database for US number portability. Over 30% of US phone numbers have been ported at least once, making NPAC lookups essential for accurate carrier identification. Area code or NPA-NXX carrier inference is unreliable for ported numbers.
What is an LRN and how is it used in carrier lookup?
An LRN (Local Routing Number) is a 10-digit number assigned to a phone number's current serving carrier in the NPAC database. Carrier lookup resolves a phone number to its LRN, which then maps to a specific carrier. This is the most reliable method for identifying a number's current carrier, especially after number porting.
Can I use the carrier lookup API to optimize SMS routing?
Yes. Knowing the current serving carrier lets you route SMS messages through the appropriate gateway or aggregator for that carrier. This reduces latency, improves deliverability, and lowers cost for high-volume messaging. The VRI LRN API returns carrier name and carrier type in every response at $0.0005 per lookup.
Look Up Carriers
NPAC-sourced carrier data with exclusive LRN Activation Date.