MSISDN Validator

The MSISDN Validator enforces international number integrity by validating against ITU-E.164 rules, returning a canonical E.164 value and country mapping. It is designed for telecom operators, CRM teams, fintechs, and app developers who collect international numbers and require clean, searchable data.
Conceptually, the tool sanitizes input by removing spaces and separators, then constructs a canonical number by combining a country code with the national subscriber number. It verifies length constraints (8–15 digits for E.164) and ensures only numeric characters are present, producing a structured validation result.
Outputs include is_valid, normalized_number, country_code, and country_name, along with an errors list when validation fails. The tool can operate in strict mode to reject borderline numbers or in loose mode to accept common variances. It does not perform real-time carrier checks or subscriber status verification.
Target users include data engineers performing data quality checks, signup systems that require reliable contact data, fraud prevention teams, and analytics platforms that segment users by region. Its unique value lies in explicit, standards-based normalization combined with precise error reporting to support automated cleansing pipelines.