# CallTracer > Free, no-signup phone number lookup. Identify carrier, location, line type, and crowd-sourced spam reports for any number in the world — usually in under a second. Every valid E.164 number has a dedicated page at `/number/{e164}` that includes: - Country, region, and primary timezone - Number type (mobile, fixed-line, toll-free, VoIP, etc.) and carrier when known - Community-sourced spam score (0–100) and recent reports - User-submitted tips and quick yes/no votes - A plain-language summary block at the top, written for AI citation - A FAQ section (also emitted as schema.org FAQPage JSON-LD) ## Agent-friendly notes - Every number page exposes a JSON alternate via the standard discovery patterns: an HTTP `Link: ; rel="alternate"; type="application/json"` header on the HTML response, and a matching `` tag in ``. **Agents should prefer the JSON endpoint** for clean structured data. - This `/llms.txt` file is referenced from each number page via `Link: ; rel="describedby"`. - Rate-limited but anonymous use is allowed; no auth required. ## Lookup - [Search a phone number](https://calltracer.io/) — homepage with global search ## Country directories - [All countries](https://calltracer.io/country) — browse the full set of supported regions - [United States](https://calltracer.io/country/us) - [United Kingdom](https://calltracer.io/country/gb) - [India](https://calltracer.io/country/in) - [Germany](https://calltracer.io/country/de) - [Australia](https://calltracer.io/country/au) ## Reference - [About](https://calltracer.io/about) — how CallTracer works - [Privacy](https://calltracer.io/privacy) — data handling and retention - [Request removal](https://calltracer.io/request-removal) — owner / DMCA takedown form - [Blog](https://calltracer.io/blog) — long-form posts on phone fraud patterns - [Sitemap](https://calltracer.io/sitemap.xml) — full URL index for crawlers ## API ### `GET /api/lookup/{number}` Full number resolution + community signals. `{number}` accepts E.164 digits with or without the leading `+`, plus common separators (spaces, dashes, parens) which are stripped server-side. ```sh curl https://calltracer.io/api/lookup/12024561111 ``` Response (200): ```json { "number": "+12024561111", "international": "+1 202-456-1111", "national": "(202) 456-1111", "country_code": 1, "country_iso": "US", "country": "United States", "number_type": "Fixed Line", "carrier": null, "location": "Washington, DC", "timezones": ["America/New_York"], "is_valid": true, "reports": { "total": 0, "spam_score": 0, "last_reported_at": null } } ``` 422 with `{"error": "..."}` for unrecognized input. Anonymous IP-throttled. Pass `Authorization: Bearer YOUR_KEY` for a higher rate limit (sign up at [https://calltracer.io/dashboard](https://calltracer.io/dashboard) to generate one). ### `GET /api/autocomplete?q={partial_number}` Single-suggestion preview for partial input. Useful for search-as-you-type UIs. ```sh curl 'https://calltracer.io/api/autocomplete?q=971527041991' ``` Response (200): ```json { "suggestion": { "e164": "971527041991", "international": "+971 52 704 1991", "country_iso": "AE", "country_code": 971, "country_name": "United Arab Emirates", "is_valid": true, "is_possible": true }, "href": "/number/971527041991" } ``` `suggestion` is `null` when the input doesn't parse to anything useful.