Phone Number Carrier Lookup API
Real-time carrier identification — with messaging provider routing data no other lookup API returns. Identify the carrier, line type, LRN, and the SMS aggregator behind any US phone number. $0.0009 per lookup. No minimums. No contract.
What the carrier lookup API returns
A single API request returns everything you need to make routing, compliance, and hygiene decisions without stitching together multiple data sources. The response includes the subscriber carrier, the active messaging provider, line type, Local Routing Number (LRN), number portability status, and CNAM — all in one call, median response under 50 ms. No multiple API calls. No joining datasets. One request, complete picture.
The messaging_provider field is exclusive to VeriRouteIntel. Every other carrier lookup API stops at the subscriber carrier — the company the end user pays for service. VRI goes one layer deeper to identify the SMS aggregator or CPaaS platform actively routing traffic for that number. That distinction matters because carrier alone does not predict whether your message delivers. The aggregator relationship, throughput agreements, and spam-scoring posture of the messaging provider are what actually determine whether your SMS lands in the inbox or gets filtered at the network edge.
Example API response
{
"phone_number": "+14155551234",
"country_code": "US",
"valid": true,
"line_type": "mobile",
"carrier": {
"name": "T-Mobile USA",
"mcc": "310",
"mnc": "260"
},
"messaging_provider": {
"name": "Sinch",
"type": "aggregator",
"confidence": "high"
},
"lrn": "4155551234",
"ported": false,
"cnam": "JOHN SMITH",
"lookup_id": "vri_lu_01h8x9yz23",
"latency_ms": 38
}What teams use carrier lookup for
SMS routing optimization
Routing outbound SMS without carrier data is guesswork. Different aggregators have different throughput agreements and spam-scoring relationships with each carrier. When you know the carrier and messaging provider behind each destination number, you can route through the path most likely to deliver — matching your outbound aggregator to the destination's routing path where possible, and avoiding aggregators that are congested or flagged on the destination carrier side. SMS teams running at 10 million or more messages per month report measurable deliverability improvements when they segment send paths by carrier rather than routing everything through a single aggregator.
Pre-dial validation and TCPA compliance
Dialing landlines with auto-dialers configured for mobile-only campaigns wastes agent capacity and creates TCPA exposure. VoIP lines present a different compliance profile from wireline numbers when STIR/SHAKEN attestation context matters. Identifying line type — mobile, landline, VoIP, toll-free — before a call is placed lets contact centers filter landlines out of wireless-only campaigns, route VoIP numbers to manual review queues, and verify that wireless consent records match actual wireless numbers. Pre-dial validation is also the right point to catch number format issues, country mismatches, and disconnected numbers before they hit your dialer queue and generate compliance events.
Number hygiene and list cleaning
Contact lists decay at roughly 2–3% per month. Numbers disconnect, port between carriers, and accumulate stale routing data that tanks deliverability without surfacing obvious errors. Running a carrier lookup pass across a database before a campaign identifies disconnected numbers, flags numbers where the carrier has changed since last contact, and surfaces mobile numbers that have migrated to VoIP and may require a different outreach strategy. At $0.0009 per record, cleaning a list costs a fraction of the cost of a campaign sent to a degraded list — in wasted sends, burned sender reputation, and carrier filtering that can take weeks to recover from.
Pricing — $0.0009 per lookup
VeriRouteIntel charges $0.0009 per lookup with no monthly minimums, no setup fees, and no contract. Pay only for what you use. New accounts start with 10 free lookups — no credit card required. Usage is billed monthly, and you can set spend limits to keep costs predictable at any volume.
| Monthly volume | Price per lookup | Estimated monthly cost |
|---|---|---|
| 1 – 99,999 | $0.0009 | Up to $90 |
| 100,000 – 999,999 | $0.0009 | Up to $900 |
| 1,000,000+ | Contact for volume pricing | Custom |
How VeriRouteIntel compares to other carrier lookup APIs
Most carrier lookup APIs return the subscriber carrier and line type — and stop there. That is useful for basic validation but insufficient for SMS deliverability decisions, where the messaging provider is the variable that determines routing outcomes. VeriRouteIntel is the only carrier identification API that returns both the carrier and the active messaging provider in a single response. That differentiation, combined with pricing that is 3–5x lower than major alternatives, makes VRI the carrier lookup API for high-volume SMS operations.
| Feature | VeriRouteIntel | Twilio Lookup | Numverify | Telnyx |
|---|---|---|---|---|
| Price per lookup | $0.0009 | ~$0.005 | ~$0.003 | ~$0.003 |
| Carrier name | ✓ | ✓ | ✓ | ✓ |
| Messaging provider identification | ✓ | — | — | — |
| Line type (mobile / landline / VoIP) | ✓ | ✓ | ✓ | ✓ |
| LRN data | ✓ | — | — | ✓ |
| Number portability status | ✓ | ✓ | ✓ | ✓ |
| CNAM | ✓ | ✓ (add-on) | — | ✓ |
| No minimum commitment | ✓ | ✓ | ✓ | ✓ |
| Bulk / batch lookup | ✓ | ✓ | ✓ | ✓ |
Competitor pricing is approximate; verify current rates on vendor sites.
Start in minutes
Sign up for a free account, get your API key, and run your first carrier lookup in under five minutes. VeriRouteIntel's REST API accepts standard JSON requests and returns results in under 50 ms. Client libraries are available for Python, Node.js, Go, and Ruby. Documentation covers authentication, rate limits, error codes, bulk lookup endpoints, and webhook integration for asynchronous workflows at scale. Your first 10 lookups are free — no credit card, no expiration date, no usage pressure.
Frequently asked questions
What is a carrier lookup API?
A carrier lookup API identifies the telephone carrier associated with a phone number. When you submit a number, the API queries live routing databases and returns the carrier name, line type (mobile, landline, VoIP), and portability status. VeriRouteIntel extends the standard response with the active messaging provider — the SMS aggregator or CPaaS platform routing traffic for that number — which no other carrier lookup API returns. This is the data point that determines real deliverability outcomes for SMS senders, not just the subscriber relationship at the carrier level.
How accurate is VeriRouteIntel carrier lookup data?
VeriRouteIntel queries live LRN (Local Routing Number) data refreshed daily, combined with real-time CNAM and messaging provider signals. Carrier identification accuracy exceeds 99% for US mobile numbers. Porting events typically propagate within 24 hours of a number transfer completing, so the carrier and messaging provider returned reflect current routing — not original assignment at the time of number issuance.
What is the difference between carrier and messaging provider?
The carrier is the company that holds the subscriber relationship — the entity the end user pays for phone service (T-Mobile, AT&T, Verizon). The messaging provider is the entity actually routing SMS traffic for that number, which is frequently a separate CPaaS platform or SMS aggregator such as Sinch, Twilio, or Bandwidth. A T-Mobile subscriber's SMS may route through Sinch; an AT&T subscriber's messages may route through a different aggregator depending on their plan or business account. Most carrier lookup APIs only return the carrier. VeriRouteIntel returns both, giving SMS teams the routing intelligence they need to make real deliverability decisions instead of assumptions.
How fast is the carrier lookup API?
Median response latency is under 50 milliseconds from request to response. VeriRouteIntel is designed for high-throughput production environments with no artificial throttling on standard plans. The API supports both synchronous single-number lookups for real-time validation and bulk batch processing for number hygiene workflows running millions of records. Rate limits scale with volume — contact VRI for high-volume SLA requirements.
Is there a minimum commitment or monthly fee?
No minimum, no monthly fee, no contract. You pay $0.0009 per lookup for exactly what you use. New accounts receive 10 free lookups to test integration and validate data quality before committing. For teams running 1 million or more lookups per month, contact us for volume pricing.
Does the carrier lookup API return accurate data for ported numbers?
Yes. VeriRouteIntel queries current LRN data that reflects number portability, so the carrier and messaging provider returned are accurate for the number's current routing — not the original carrier assignment. The ported field in the API response explicitly flags whether the number has been transferred from its original carrier. This matters for list hygiene workflows where stale carrier data from an earlier lookup may no longer reflect where the number actually routes today.
No credit card required. Includes carrier name, messaging provider, line type, LRN, portability status, and CNAM.
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