Lookup

Lookup helps you reduce fraud, increase lead conversion, and drive message delivery programmatically.

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The Lookup API puts data to work for you.

Reducing fraud

Fraud comes in all shapes and sizes. You need a versatile tool to help you detect and fight anything from spam account signups to bad actors.

Lookup helps you spot fraud using phone number data such as caller origin, line type, and caller name. Protect users, and assess risk proactively using reliable data.

Increase lead conversions

Context is essential to customer experience and conversion. Lookup instantly delivers you a caller ID name and persona type so you can provide a customer or business with a tailored experience — even if it’s their first time calling in.

Improve message deliverability

Your message matters to your customers. Lookup serves up carrier and phone number information so you can pick the right medium for your message and ensure it’s delivered.

Get the data you need with Lookup

Choose the plan that's right for you and your users.

Format Lookup

Free

Best for validating inputs

Carrier Lookup

.5 cents per request

Best for ensuring message delivery

Caller Lookup

1 cent per request

Best for identifying inbound callers. US only.

Fraud Lookup
Preview

Request access

Best for preventing account fraud. US only.

Format and Origin
Line Type
Carrier
Caller Name
Caller Type
Advanced Line Type
Porting History
Roaming Status

Format Lookup

Free

Best for validating inputs

Format and Origin

Carrier Lookup

.5 cents per request

Best for ensuring message delivery

Format and Origin
Line Type
Carrier

Caller Lookup

1 cent per request

Best for identifying inbound callers. US only.

Format and Origin
Caller Name
Caller Type

Fraud Lookup
Preview

Best for preventing account fraud. US only.

Format and Origin
Caller Name
Caller Type
Advanced Line Type
Porting History
Roaming Status
Sign up and try Lookup

More than 100,000 Lookups per month? Talk to an expert

How Twilio Lookup makes 
a difference in your business

Having the correct data is only half the battle. You need accuracy and speed to protect your users and fight fraud at scale. Lookup gives you the tools you need to do just that.

Browse Lookup docs & SDKs

High throughput, no throttling

Lookup enables you to make thousands of requests per second with no lag.

Accurate data backed by multiple sources

Old data is as good as no data. Lookup gives you the most current data so you can make the right decisions.

Build fast

Lookup is easy to integrate with your application via REST API and prebuilt SDKs.

Research, Bundle, Build

Next Steps

Research

Discover the right version of Lookup for you

Fraud LookupCaller LookupCarrier Lookup

Bundle

Learn how to add it into your use case

Account SecurityContact CenterCall & Text Marketing

Build

Get started

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