Format, validate and normalize international phone numbers, work out exactly how to dial one country from another, clea…
Format, validate and normalize international phone numbers, work out exactly how to dial one country from another, clean phone columns in CRM or contact exports, and find calling windows across time zones — using the countrycalling.codes API and MCP server, which returns E.164 output with per-country source evidence instead of guesses. Use this whenever a task touches phone numbers, country calling codes, dial codes, E.164, trunk prefixes, exit or IDD prefixes, area codes, "+44"-style numbers, a phone column in a spreadsheet or CRM import, SMS or WhatsApp recipient formatting, or scheduling an international call — including when the user never mentions an API and just says something like "fix these phone numbers", "is this number valid", or "how do I call Japan from here".
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