Phone Carrier Lookup API

What it does

The phone number lookup API returns what is known about a phone number: its carrier, geographic region, time zones, and number type. Send the number in the number query parameter and the response comes back as JSON.

One optional parameter handles ambiguous input. Set country when a number arrives in national format and you need it interpreted for a specific country. It defaults to US. The response contains the normalized number, plus carrier, region, timezones and number_type. Fields the service can resolve are filled in, and the rest come back as null, so treat them as optional in your code.

Support teams use it to route calls and messages by network. Growth teams run carrier lookup across contact lists before a campaign. Scheduling tools read timezones to pick a sending window, and signup flows read number_type to separate mobile numbers from landline and VoIP.

The phone number lookup API describes the number itself. To confirm a number is well formed before you look it up, run the Phone Validation API first and pass the E.164 result here.

It pairs with the IANA Timezone API when you need the full timezone list to match against, and with the All-in-One Verification API when a phone number is one signal in a wider fraud check. All three are callable by AI agents through ApyHub MCP.