[Lookup / Resources](/phone-number-lookup-api)

# Know what the answer means.

Check a phone number or email address, interpret the result, and use it in your application. Find examples, signal explanations and migration guides.

[Start now ↗](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Flookup)

[Talk to sales ↗](/demo?product=lookup&source_page=%2Flookup%2Fresources)

## Make your first lookup

- [TypeScript quickstart](/docs/get-started/quickstarts/typescript/lookup): Run a lookup and inspect the returned properties.
- [Python quickstart](/docs/get-started/quickstarts/python/lookup): Read a phone-number result with the Python SDK.
- [Phone-number guide](/docs/guides/lookup/phone-numbers): Understand base data and optional properties.
- [Email-address guide](/docs/guides/lookup/email-addresses): Interpret the email verdict and delivery confidence.
- [Phone lookup with the CLI](/docs/cli/reference/lookup-phone-number): Choose the requested properties and inspect each returned signal and its limits.
- [CLI and MCP setup](/docs/ai/set-up-your-agent): Connect your coding agent, discover lookup operations and prepare a phone or email check.

## Build a lookup form

- [Next.js form](/docs/get-started/quickstarts/typescript/next-js/lookup): Check phone numbers and email addresses, preserve retries and choose a verification or correction step.
- [FastAPI form](/docs/get-started/quickstarts/python/fastapi/lookup): Check phone numbers and email addresses, preserve retries and choose a verification or correction step.

## Use the result

- [Make a routing decision](/docs/guides/lookup/application-flow): Use answered signals to choose verification or messaging steps.
- [Troubleshooting](/docs/guides/lookup/troubleshooting): Handle malformed input and unavailable properties.
- [API reference](/docs/api/reference/create-phone-number-lookup): Read the supported request and response fields.

## Evaluate and migrate

- [Migration guides](/docs/guides/lookup/migrate): Map Twilio Lookup or Vonage Number Insight to Bird.
- [Migrate from Twilio Lookup](/docs/guides/lookup/migrate/twilio): Map line types, SIM-swap observations and risk decisions without losing unknown results.
- [Migrate from Vonage Number Insight](/docs/guides/lookup/migrate/vonage): Map carrier fields and move asynchronous lookup tasks into your application.
- [Lookup pricing](/products/lookup/pricing): Review base and optional-property charges.
- [Lookup FAQs](/products/lookup/faqs): Find answers before adding Lookup to your workflow.
- [Compare providers](/products/lookup/compare): Evaluate the integration model, customer journey and work involved in switching.

## Build with Lookup.

Start with a working example, or talk to our team about your integration and migration.

[Start now ↗](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Flookup)

[Talk to sales ↗](/demo?product=lookup&source_page=%2Flookup%2Fresources)