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For developers

Carrier and caller ID lookups by API.

The same lookups as this page, from your code: carrier, line type and caller ID name as JSON. Try a number free first.

3 of 3 free lookups left today
  • No sign-up
  • We never contact the number
  • Spam risk included

Two endpoints, one price

POST /v1/lookups/carrier   {"phone": "614-555-0178"}
POST /v1/lookups/cnam      {"phone": "614-555-0178"}

Carrier answers include the carrier, line type (mobile, landline, VoIP, toll-free), whether the number is in service, and the mobile network codes. Caller name answers include the CNAM. Each is 5¢ when it finds something; a no-match and errors are free. Test keys answer from samples, so you can build before you pay.

Built for production

  • Prepaid balance with auto-refill, idempotency keys and a per-key spending limit.
  • Webhooks, an OpenAPI spec, and an MCP server for AI assistants.
  • Plans with included lookups and volume rates for full reports. Caller ID and carrier lookups are priced on their own.

See the API

Use cases

  • Clean a contact list: drop landlines before an SMS campaign.
  • Flag sign-ups from throwaway VoIP numbers.
  • Show who’s calling in your CRM or help desk.

More than three a day

Every plan includes caller ID lookups.

Caller ID and carrier lookups every month, plus full reports with the owner, their address and a real FICO® Score 4.

Basic

$29a month

Try it: $1 for 1 day

  • 100 caller ID & carrier lookups a month
  • 3 full reports a month
  • Owner, address and FICO® Score 4
  • Or $99 a year

$1 today, then $29/month after 1 day · cancel anytime

Most lookups

Platinum

$59a month

Try it: $1 for 7 days

  • 1,000 caller ID & carrier lookups a month
  • 5 full reports a month
  • Owner, address and FICO® Score 4
  • Or $199 a year

$1 today, then $59/month after 7 days · cancel anytime

Just one report

$19.99one time

No subscription

  • Who the number belongs to
  • Current address
  • FICO® Score 4 and credit profile

$19.99 once · nothing to cancel

You pick a plan after looking up a number. Full reports need a permissible purpose, like the person’s consent. Caller ID lookups past a plan’s monthly amount are 5¢ each; during a trial, up to 10 are included.

Questions

How fast is it?

Most answers come back in well under a second.

Is there a free tier?

Test keys are free and return sample data. Live lookups are 5¢ each when they find something, and memberships include monthly lookups.

Can I look up numbers in bulk?

Send one request per number, in parallel. Rate limits are generous; contact us for higher volume.