Call Center LRN

LRN Lookup for Call Centers.

Pre-dial number portability verification for compliance-conscious call centers. Catch ported wireless numbers before you dial. Bulk list scrubbing and real-time API modes.

Get API Access NowView Compliance Suite
<10ms
Pre-Dial Overhead
10M+
Batch Size
TCPA
Compliance Use
# Pre-dial hook in your dialer config
Checking: +13105550099...
✓ line_type: "wireless"
✓ ported: true
⚠ ATDS compliance check required

Infrastructure-Grade

Purpose-Built for Call Center Operations

From list scrubbing to real-time pre-dial verification — every LRN feature call centers need.

📋

Pre-Campaign List Scrub

Verify LRN and line type for every number in your contact list before campaign launch. Catch wireless/landline mismatches that affect compliance.

⚡

Pre-Dial API Hook

Integrate into your dialer's pre-dial hook via REST API. LRN verification adds <10ms overhead — imperceptible to call flow.

📱

Wireless Detection

Identify wireless (mobile) numbers from LRN data. Critical for TCPA compliance when using ATDS equipment.

🔄

Ported Number Accuracy

Ported numbers have different LRNs than their original numbers. Our real-time NPAC dips catch portings that invalidate previous line-type classifications.

📊

Batch Scrubbing

Upload contact lists of up to 10 million numbers for bulk LRN + line type verification before dialing campaigns launch.

💰

Volume Pricing for Dialers

Dialer-scale LRN lookup volume qualifies for deep discounts. Per-lookup cost drops significantly at 1M+ monthly lookups.

Start Free — 1,000 Lookups Included

Developer-First

Pre-Dial Integration — Under 10ms

Request

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

Response — <10ms

200 OK
{
  "number": "+13105550099",
  "lrn": "3105550099",
  "line_type": "wireless",
  "ported": true,
  "ocn": "7452",
  "latency_ms": 9
}
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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

Call Center LRN FAQ

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

  • LRN lookup tells you the current line type (wireless vs landline) and carrier after any ports. Since numbers are frequently ported, a number that was landline at list acquisition may now be wireless — changing TCPA obligations. Pre-dial LRN checks keep your compliance current.
  • Most predictive and power dialers support pre-dial webhook hooks. Configure our API endpoint as your pre-dial hook. We return line type and LRN in under 10ms — before your dialer initiates the SIP INVITE.
  • No. LRN is one signal, not a complete compliance check. We recommend combining LRN with our Pre-Dial Compliance API which checks Federal DNC, State DNC, and wireless classification together. See our LRN Lookup API and compliance products.

Protect Your Dialing Compliance with LRN

Pre-dial number portability verification. 1,000 free lookups to start. No credit card.

Start Free NowView Pricing

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