The Three-Layer Processing Order for International Number Detection: From Format Standardization to Platform Activation Status

Cross-border customer list detection should proceed in three layers: first use the E.164 standard to complete area codes and parse number ranges, then query carrier and empty-number status via HLR, and finally detect registration and activity status for business platforms. This article presents the cleaning and splitting order for multi-country lists, the boundary between basic line verification and platform status detection, and the rationale for choosing between console batch processing and API write-back.