LRN Lookup API

Get Local Routing Numbers, carrier information, and porting history for any US phone number. Free lrn_activated_at included with every lookup.

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What is LRN Lookup?

LRN (Local Routing Number) is a 10-digit number used by telecom carriers to route calls to ported phone numbers.

🔀

Local Routing Number

The actual routing number for network operations. Essential for proper call routing to ported numbers.

📅

Porting History (FREE)

lrn_activated_at shows when the number was ported. Key indicator for fraud detection.

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Carrier Identification

Current carrier name and type. Enhanced data includes OCN, LATA, and rate center.

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Location Data

City, state, timezone, and geographic information for the phone number.

LRN Lookup API Example

Simple REST API with fast response times:

Basic LRN Lookup

# Request
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": "13364086644"}'

# Response
{
  "lrn": "13364086644",
  "lrn_activated_at": "2019-03-15T00:00:00Z",
  "phone_number": "13364086644"
}
            

Enhanced LRN Lookup

# Request with enhanced data
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": "13364086644", "include_enhanced_lrn": true}'

# Response
{
  "lrn": "13364086644",
  "lrn_activated_at": "2019-03-15T00:00:00Z",
  "phone_number": "13364086644",
  "enhanced_lrn": {
    "carrier": "Verizon Wireless",
    "carrier_type": "WIRELESS",
    "ocn": "6324",
    "lata": "424",
    "rate_center": "WINSTN SAL",
    "city": "Clemmons",
    "state": "NC",
    "timezone": "-0500"
  }
}
            

lrn 10-digit routing number for the terminating switch

lrn_activated_at Date the number was ported (FREE)

carrier & carrier_type Current carrier and line type (wireless/landline/VoIP)

Location Data City, state, rate center, LATA, timezone

LRN Lookup Use Cases

How businesses use LRN data:

Call Routing & Billing - Route calls correctly to ported numbers and calculate accurate interconnect charges.
Fraud Prevention - Check lrn_activated_at to detect recently ported numbers associated with fraud schemes.
Carrier Identification - Identify which carrier serves a number for routing and compliance.
Lead Validation - Verify lead quality by checking carrier type and porting history.
VoIP Infrastructure - Ensure correct routing for SBCs and softswitches.

LRN Lookup Pricing

Simple pay-as-you-go pricing. No monthly minimums.

Standard

$0.0005

per lookup

Includes lrn_activated_at FREE
No monthly minimums

Enterprise

Custom

pricing

High-volume plans
Dedicated support & SLA

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Frequently Asked Questions

What is LRN lookup?

LRN (Local Routing Number) lookup retrieves the routing number used to direct calls to ported phone numbers. It also returns when the number was ported (lrn_activated_at) and carrier information.

Is lrn_activated_at included free?

Yes! Every LRN lookup includes the lrn_activated_at field at no additional charge. This shows exactly when the number was ported to its current carrier.

What's the difference between LRN and enhanced LRN?

Basic LRN returns the routing number, porting date, and phone number. Enhanced LRN adds carrier name, carrier type, OCN, LATA, rate center, city, state, and timezone.