# Lookup

Source: https://joinsimplesms.com/docs/lookup
Index: https://joinsimplesms.com/llms.txt

## Look up a number

`GET /v1/lookup/+14155550132`

```json
{
  "phone_number": "+14155550132",
  "valid": true,
  "line_type": "mobile",
  "carrier": { "name": "Verizon Wireless", "type": "mobile" },
  "caller_name": null
}
```

Test keys return deterministic fixtures; live keys return real carrier data
(cached 24h).

Lookups count against a daily quota (default 250/day live, 100/day sandbox).