Carrier Network Lookup for SMS

Why Carrier Lookup Matters for SMS

Over 30% of US phone numbers have been ported to different carriers. A number with a Verizon area code might now be on T-Mobile. Carrier lookup reveals the current network for accurate routing.

How Carrier Lookup Works

Carrier lookup queries authoritative databases (NPAC/LRN) to identify:

• Current carrier — Who serves the number now
• Original carrier — Who originally owned the number
• Porting status — Whether the number has been ported
• LRN (Local Routing Number) — Used for call routing

Using Carrier Data for SMS

Routing Optimization

With carrier data, you can:

• Choose direct routes to specific carriers
• Avoid routes with known delivery issues
• Optimize for cost or speed based on carrier

Deliverability Insights

• Line type — Wireless numbers support SMS; landlines often don't
• VoIP detection — Some VoIP providers have limited SMS support
• Regional carriers — May require specific routing

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 includes carrier name, line type, LRN, and more.