Prefixyr is a global telecommunications reference service focused on dialing codes, area codes, and exchange-routing information. Its structured directory covers international prefixes and regional telephone allocations, helping users find and verify numbering details across countries and territories. The site presents country calling codes for 248 jurisdictions and describes a broader dataset containing 125,000 area codes, 450,000 exchanges, and 575,000 E.164 routes.

Prefixyr’s resources include an international prefix lookup for identifying exit codes, country dialing formats, and national destination codes. It also offers area and exchange routing data, with regional area-code and local central-office allocations intended to support phone number validation and telecommunications planning. The directory organizes destinations alphabetically and maps country codes according to ITU-T Recommendation E.164 standards.

Designed for global communications and telecommunications architecture, Prefixyr serves people and organizations seeking structured numbering information for international calling verification and routing research. The website also provides information about the service, contact details, and policies covering terms, privacy, and cookies.