LRN Lookup API for VoIP Providers

Route calls correctly, reduce termination costs, and improve call completion rates with real-time Local Routing Number data. Built for VoIP infrastructure.

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Why Your VoIP Network Needs LRN Lookup

Number portability means phone numbers can move between carriers while keeping the same digits. For VoIP providers, this creates a routing challenge: you can't rely on the NPA-NXX to determine where to send calls.

🔀

Correct Routing

Route calls to the right carrier on the first try. Eliminate misrouted calls and the customer complaints that follow.

💰

Lower Costs

Choose optimal routes based on actual terminating carrier. Avoid expensive intermediate carriers and failed routing charges.

✓

Better Completion

Higher call completion rates mean happier customers. LRN lookup ensures calls reach their destination the first time.

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Compliance Ready

Meet TRACED Act requirements, support SHAKEN/STIR attestation, and maintain accurate carrier records for regulatory audits.

LRN Data for VoIP Routing

Our API returns comprehensive routing data for intelligent call processing:

API Response Example
# 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", "include_enhanced_lrn": true}'

# Response (< 200ms)
{
  "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 - key fraud indicator
Carrier & OCN Carrier name and Operating Company Number
Line Type Landline, wireless, or VoIP classification
Rate Center & LATA Geographic routing and rating information

VoIP Provider Pricing

Transparent pricing designed for VoIP traffic volumes:

Standard

$0.0005
per lookup

No monthly minimums
Pay only for what you use

Enterprise

Custom
pricing

High-volume plans
Dedicated support & SLA

Start Free - Fund Your Wallet Anytime

Frequently Asked Questions

Why do VoIP providers need LRN lookup?

When phone numbers are ported between carriers, the original NPA-NXX no longer indicates the correct terminating carrier. LRN lookup returns the actual routing number, ensuring calls reach ported numbers correctly.

How does LRN lookup reduce termination costs?

By knowing the actual terminating carrier before routing, you can select optimal routes and avoid expensive intermediate carriers. Many VoIP providers report 10-20% cost reduction after implementing LRN-based routing.

Is the API fast enough for real-time routing?

Yes, our API responds in under 200ms, which fits within standard SIP timeout windows. For ultra-low-latency requirements, we offer bulk pre-fetching to cache frequently-called numbers.