Number Lookup Guide

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Lookup: Carrier and Caller Name

Number Lookup is a service offered by the Telnyx SDK that allows the user to look up a phone number and retrieve information regarding that phone number such as:

  • Carrier name
  • Type of phone (landline, mobile, etc.)
  • Name and business associated with the number

Basic Number Lookup Example

Running the following code will perform a number lookup on the given number parameter using Python.

import telnyx
telnyx.api_key = "YOUR_API_KEY"

The response will look something like this:

  "data": {
    "caller_name": {
      "caller_name": "TELNYX LLC",
      "error_code": "10001"
    "carrier": {
      "error_code": null,
      "mobile_country_code": "US",
      "mobile_network_code": 866,
      "name": "Telnyx/4",
      "type": "voip"
    "country_code": "US",
    "fraud": null,
    "national_format": "(0312) 945-7420",
    "phone_number": "+13129457420",
    "portability": {
      "altspid": "073H",
      "altspid_carrier_name": "Telnyx/4",
      "altspid_carrier_type": "3",
      "city": "WAUKEGAN",
      "line_type": "voip",
      "lrn": "2245701999",
      "ocn": "073H",
      "ported_date": "2017-10-20",
      "ported_status": "Y",
      "spid": "073H",
      "spid_carrier_name": "Telnyx/4",
      "spid_carrier_type": "3",
      "state": "Illinois"
    "record_type": "number_lookup"

This example shows results for a Telnyx user-owned number. It displays the formatted version of the number in the national-format value. The location of the number can be seen under portability -> city and state.

Retrieving Caller Name and Carrier

Users may also specify the type of the request in order to receive information about the carrier and caller-name. Note that the request will always return the same object, however if the caller-name and carrier options are not sent, the return values will be null.

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