Messy local numbers become uniform Telegram international format numbers after cleaning

How to Write Telegram Phone Number Format: E.164 International Format, Leading Zero Handling, and Multi-Country List Organization Order

Telegram identifies numbers in E.164 international format: country code plus the number with domestic prefixes removed, digits only. This article provides the order for organizing multi-country contact lists, including separators, 00/011 prefixes, leading zeros, Excel digit loss, deduplication, and grouping by country, and lists numbers that still need separate handling even after correct formatting.

Default 2026-10-14 98 views
E.164 data cleaning Telegram phone number format Multi-Country List
Diagram illustrating the process of converting phone numbers from local format to E.164 international standard format

WhatsApp E.164 Format Conversion Rules: Country Codes, Leading Zeros, and Special Encoding for Argentina and Mexico

WhatsApp requires phone numbers to follow the ITU-T E.164 international standard: starting with '+', followed by a 1-3 digit country code and the local number, with no spaces or symbols and a total length not exceeding 15 digits. Standard processing requires stripping local leading zeros and 00/011 exit prefixes, but Argentina (+54) needs a 9 after the country code with the mobile prefix 15 removed, and Mexico (+52) needs to retain or add a 1. This article provides the complete cleaning sequence from raw lists to standard E.164.

Default 2026-09-20 120 views
E.164 WhatsApp number cleaning Argentina Mexico phone number format
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