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Lookup

Improve your message deliverability with Twilio Lookup. You can validate and identify phone number types and carriers, format numbers for local standards, assess risks, verify ownership, and ensure compliance with industry best practices. Reach the right recipients while maintaining accuracy and security.

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Use cases

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Twilio servers

Your app

const accountSid = process.env.TWILIO_ACCOUNT_SID;
const authToken = process.env.TWILIO_AUTH_TOKEN;
const client = require('twilio')(accountSid, authToken);

async function fetchPhoneNumber() {
  const phoneNumber = await client.lookups.v2
    .phoneNumbers("+14159929960")
    .fetch({ fields: "line_type_intelligence" });

  console.log(phoneNumber.lineTypeIntelligence);
}

fetchPhoneNumber();

Filter out invalid numbers and landline numbers before sending messages.

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Use cases

Build your App

Get started

Choose your programming language and dive into Twilio Lookup Quickstart.

Data packages

Use Lookup data packages to get phone number information.

Line Type Intelligence

SMS Pumping Risk Score

Line Status

Use cases

Filter out VoIP numbers: Detect VoIP phone numbers, often associated with bots, before sending SMS messages.
Filter out landline numbers: Identify landline phone numbers to prevent undeliverable SMS messages and avoid unnecessary delivery costs.
Validate phone number ownership: Verify the ownership of a mobile phone number.
Avoid Telephone Consumer Protection Act (TCPA) violation fees: Verify whether the current owner of a phone number is the same as the previous owner.
Detect SIM swaps: Detect potential fraud by identifying SIM swaps before sending one-time passwords (OTPs).

Build your App

Learn how to build secure login systems with Twilio Verify and Lookup.

Twilio Verify

Get a comprehensive solution to cut costs, increase OTP conversions, and reduce fraud risk.

Product documentation

Twilio Messaging

Increase deliverability and reduce undeliverable messages.

Product documentation

Twilio Voice

Increase deliverability and reduce undeliverable voice calls.

Product documentation

Lookup

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Use cases

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