Observed arrival · 2026-10-27
PhoneLookup.dev maps the rules behind phone numbers
A developer reference and toolkit for country calling codes, phone-number formats, validation regexes, and dialing guidance.
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ƒJS
- For
- Developers handling international phone numbers
- Worth noticing
- The navigation links to numbering-plan authorities including NANPA, CNAC, and ITU-T E.164.
Field notes
The page separates country lookup, numbering-plan facts, regex generation, and dialing guidance into distinct sections. Its source links include NANPA, the Canadian Numbering Administrator, and ITU-T E.164; language examples are linked for eight programming languages, from JavaScript and Python to Rust. The extract does not establish how often its country-specific rules are checked or updated.
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