---
title: "Lookup Numbers"
method: GET
path: "/v1/numbers/lookup"
tags: ["numbers"]
---

# Lookup Numbers

`GET /v1/numbers/lookup`

Look up line-type intelligence for phone numbers.

Answers "should my agent text this number" before spending a message:
mobile (`lineType: "mobile"`) vs landline vs VoIP, country, and whether
the handset supports RCS. Up to 25 comma-separated numbers per request.
Billed at $0.009 per number looked up.

## Query parameters

- `phoneNumbers` string, required — Comma-separated E.164 numbers, up to 25

## Response `200`

Successful Response

- NumberLookupResponse
  - `data` NumberLookupEntry[], required
    - `phoneNumber` string, required
    - `lineType` string, nullable
    - `country` string, nullable
    - `rcsEnabled` boolean, nullable

## Other responses

- `422` — Validation Error

## Changes

> 19 revisions in range; 15 could not be searched.

- **2026-08-08** `3f3aa65dcd20` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/agentphone/apis/agentphone-api/changes/v1/numbers/lookup/get.md)

---

[API](https://skmtc.dev/agentphone/apis/agentphone-api.md) · [All operations](https://skmtc.dev/agentphone/apis/agentphone-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/agentphone/agentphone-api/revisions/e42d41db2501/schema)