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How to Read WhatsApp Number Check Results: Field Meanings, Privacy Boundaries, and CRM Write-back Order
When you receive a WhatsApp number screening export or API response, the only field that can decide whether to keep a number is 'whether it is registered'; all other activity, profile photo, and about info are affected by user privacy settings and can only be used as weighted tags. This article explains each field's meaning and boundaries, provides the processing order from list preprocessing to CRM write-back, and lists several common misjudgments.
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.
How to Standardize WhatsApp Number Format? E.164 Cleaning Order and Special Rules for Argentina and Mexico
WhatsApp requires the full international format: country code + area code + local number, with leading zeros and all symbols removed. This article explains the actual order for list processing: removing symbols, removing trunk prefixes, adding country codes, country-specific corrections (Argentina add 9 remove 15, Mexico add 1), deduplication and grouping, and which number ranges cannot register WhatsApp anyway—so format issues aren't mistaken for invalid numbers.
How to Filter WhatsApp Numbers: From E.164 Standardization to Interpreting Status Fields
A step-by-step guide to WhatsApp number filtering: standardize to E.164, deduplicate, split by country, run basic and platform status checks, and correctly interpret fields like profile photo, last seen, gender, and age.
How to Detect WhatsApp Number Validity: From List Formatting to Status Field Interpretation
A complete operational order for checking WhatsApp number validity: E.164 formatting and deduplication, device type filtering, platform registration and account status detection, plus the differences between three kinds of 'not found' under privacy boundaries and how to store results in separate fields.
