Line Type Intelligence is in Public Beta. The information in this document might change as we add or update features before the product becomes Generally Available. Public Beta products don't have a Service Level Agreement (SLA).
Use Line Type Intelligence to identify the carrier and phone line type, such as mobile, landline, fixed VoIP, non-fixed VoIP, toll free, and more. For example, you can filter out landline numbers from a list before sending SMS messages.
Line Type Intelligence is available for phone numbers worldwide.
Note: Canadian phone numbers require special approval. Learn how to request access to Canadian Number Portability Administration Center (NPAC) data. Querying a Canadian phone number without access will return a 60601 error.
Make a GET /v2/PhoneNumbers/{PhoneNumber} request with the Fields=line_type_intelligence query parameter.
1curl -X GET "https://lookups.twilio.com/v2/PhoneNumbers/{PhoneNumber}?Fields=line_type_intelligence" \ -u2$TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
The response includes the line_type_intelligence object, which includes the following properties:
| Property | Description |
|---|---|
mobile_country_code | The three-digit mobile country code of the carrier, used with the mobile_network_code to identify a mobile network operator. |
mobile_network_code | The two- or three-digit mobile network code of the carrier, used with the mobile country code to identify a mobile network operator. This is only returned for mobile numbers. |
carrier_name | The name of the carrier. |
type | The phone number type. |
error_code | The error code. If there's no error, this value will be null. |
Carrier data isn't available for phone number types: personal, tollFree, premium, sharedCost, uan, voicemail, pager, or unknown. In these cases mobile_country_code, mobile_network_code, and carrier_name values will be null.
The following are the possible values for the type property.
| Value | Description |
|---|---|
landline | A landline number that generally can't receive SMS messages. |
mobile | A mobile number that generally can receive SMS messages. |
fixedVoip | A virtual phone number associated with a physical device. For example, Comcast or Vonage. |
nonFixedVoip | A virtual phone number obtained online without requiring a physical device. For example, Google Voice or Enflick. |
personal | A phone number designated for personal use. |
tollFree | A toll-free phone number where calls are free for the calling party. |
premium | A premium-rate phone number. These numbers typically charge higher-than-normal rates for special services. |
sharedCost | A shared cost phone number. The calling party and number subscriber share the charges. These numbers charge higher-than-normal rates. |
uan | A universal access number. This is a national number that can route incoming calls to different destinations. |
voicemail | A phone number associated with a voicemail service. |
pager | A phone number associated with a pager device. |
unknown | A valid phone number, but the line type is unknown. |
1// Download the helper library from https://www.twilio.com/docs/node/install2const twilio = require("twilio"); // Or, for ESM: import twilio from "twilio";34// Find your Account SID and Auth Token at twilio.com/console5// and set the environment variables. See http://twil.io/secure6const accountSid = process.env.TWILIO_ACCOUNT_SID;7const authToken = process.env.TWILIO_AUTH_TOKEN;8const client = twilio(accountSid, authToken);910async function fetchPhoneNumber() {11const phoneNumber = await client.lookups.v212.phoneNumbers("+14159929960")13.fetch({ fields: "line_type_intelligence" });1415console.log(phoneNumber.lineTypeIntelligence);16}1718fetchPhoneNumber();
1{2"calling_country_code": "1",3"country_code": "US",4"phone_number": "+14159929960",5"national_format": "(415) 992-9960",6"valid": true,7"validation_errors": null,8"caller_name": null,9"sim_swap": null,10"call_forwarding": null,11"line_status": null,12"line_type_intelligence": {13"error_code": null,14"mobile_country_code": "240",15"mobile_network_code": "38",16"carrier_name": "Twilio - SMS/MMS-SVR",17"type": "nonFixedVoip"18},19"identity_match": null,20"reassigned_number": null,21"sms_pumping_risk": null,22"phone_number_quality_score": null,23"pre_fill": null,24"url": "https://lookups.twilio.com/v2/PhoneNumbers/+14159929960"25}
The video below demonstrates how to check a phone number's line type with Lookup using Node.js and the Twilio Node Helper Library.