LRN
LRN Lookup (GET)
Retrieve Local Routing Number information for a phone number
get/api/v1/lrn
Query parameters
phone_numberstring required
Example:15555550123
Phone number in E.164 or national format
lrn_onlyboolean
Return only LRN data (disables all other includes for minimal, fast response)
include_enhanced_lrnboolean
Include enhanced carrier and location data (city, state, timezone)
messaging_lookupboolean
Include messaging provider information
include_cnamboolean
Include CNAM (caller name) data in response
include_trustboolean
Include trust/reputation data with reputation_score and trust_level
Response
Successful LRN lookup
Example response
{
"phone_number": "15555550123",
"lrn": "15555550123",
"lrn_activated_at": "2021-09-01T00:00:00+00:00",
"carrier": "Verizon Wireless",
"line_type": "mobile",
"cnam": {
"caller_name": "ACME CORP"
},
"trust": {
"spam_type": "NONE",
"reputation_score": 85,
"trust_level": "high",
"last_updated": "2026-01-18T12:30:00Z"
}
}