SMS Provider LRN

LRN Lookup for SMS & A2P Platforms.

Identify terminating carrier before sending. Detect ported numbers. Optimize A2P routing with NPAC-sourced LRN data and MNO carrier mapping.

Get API Access NowView Pricing
MNO
Carrier ID
10DLC
Routing Ready
Batch
List Scrubbing
# A2P pre-send routing check
Lookup: +13105550099...
✓ carrier: "T-Mobile"
✓ ported: true  mno: "310-260"
✓ Route via: T-Mobile aggregator

Infrastructure-Grade

LRN for A2P Messaging Platforms

From pre-send scrubbing to real-time routing — LRN data that improves A2P deliverability.

💬

A2P Carrier Discovery

Identify the current mobile network operator (MNO) for each destination before sending. Critical for A2P message routing and throughput optimization.

🔄

Porting Detection for SMS

Numbers ported to new carriers can break A2P routes. Our real-time LRN lookup catches ports before your messages hit the wrong aggregator.

📊

OCN-to-MNO Mapping

We enrich OCN data with MNO identifiers (T-Mobile, AT&T, Verizon, US Cellular, etc.) for direct carrier routing decisions.

⚡

Batch Pre-Send Scrub

Scrub your recipient list before each campaign. Catch ported numbers that have moved to carriers where you need different A2P agreements.

📈

Volume Ready

A2P platforms send billions of messages monthly. Our bulk API handles list verification at scale without rate limiting.

💰

Cost Optimization

Route messages through the optimal aggregator per carrier. LRN-based carrier discovery reduces fallback costs and improves deliverability.

Start Free — 1,000 Lookups Included

Developer-First

A2P Carrier Discovery API

Request

POST https://api.sipsmart.io/v1/lrn/lookup
{
  "number": "+13105550099",
  "fields": ["lrn", "ocn", "carrier_name", "ported"],
  "enrich_mno": true
}

Response — <10ms

200 OK
{
  "number": "+13105550099",
  "lrn": "3105550099",
  "ocn": "6529",
  "carrier_name": "T-Mobile USA",
  "mno_id": "310-260",
  "ported": true,
  "latency_ms": 9
}
cURLPythonNode.jsGoPHPRuby

Simple, Predictable Pricing

No Surprises. Ever.

We charge less than legacy providers and publish our prices openly. No setup fees, no hidden costs, no annual lock-in required.

Starter
$0.0001
per lookup
  • ✓ Real-time LRN dip
  • ✓ Standard latency
  • ✓ HTTPS API
  • ✓ 1,000 free lookups
Best Value
Volume
$0.00005
per lookup (1M+/mo)
  • ✓ Real-time + batch
  • ✓ <10ms Ohio cluster
  • ✓ Dedicated endpoint
  • ✓ Priority SLA
Enterprise
Custom
flat-rate
  • ✓ DB replication
  • ✓ On-prem option
  • ✓ SLA guarantee
  • ✓ Dedicated support

🛡 Pricing Guarantee

We will match or beat any competitor's published price for equivalent LRN lookup volume. Contact us with a quote.

Get Started Free

FAQ

SMS Provider LRN FAQ

Have another question? Email us at support@sipsmart.io

  • A2P message delivery often depends on having the correct carrier routing. When subscribers port their numbers, the LRN — and thus the terminating carrier — changes. Using stale carrier data routes messages through wrong aggregators, hurting deliverability and increasing cost.
  • Yes. Our OCN-to-carrier enrichment maps NPAC OCN data to major MNO brand identifiers including T-Mobile, AT&T, Verizon, US Cellular, and regional carriers. This enables you to select the correct A2P aggregator relationship per message.
  • Yes. 10DLC registration is per-carrier. Knowing which MNO a number is on (after any ports) ensures your messages are delivered through a compliant campaign registration. LRN lookup is a pre-step for accurate 10DLC routing.

Improve A2P Deliverability with LRN

NPAC-sourced carrier data for A2P routing and porting detection. 1,000 free lookups.

Start Free NowView Pricing

1,000 free lookups included • No credit card required • Instant provisioning