NexCheck-筛号平台
Telegram Number Screening: List Cleaning Order, Online Status Fields, and Privacy Boundaries
A practical guide to screening a phone number list against Telegram: normalize to E.164, deduplicate, split by country, interpret the four fuzzy Last seen ranges, and write grouped results back to CRM.
How to Deduplicate WhatsApp Numbers: Normalize to E.164 First, Then Deduplicate by Canonical Number
The same phone number can appear as different text forms with spaces, plus signs, 00 prefixes, or local leading zeros, so direct text comparison misses many duplicates. This article explains the practical order of operations: keep the original column, clean symbols, unify prefixes, add country codes, validate length, deduplicate by canonical number, and retain a mapping table before submitting for verification, reducing verification costs from duplicate rows and making it easy to write results back to each original record.
How to Integrate WhatsApp Batch Verification API: From List Cleaning and Async Submission to CRM Write-back
Using a multinational customer list as an example, this article explains in order how to batch verify WhatsApp activation and account status via API, covering E.164 normalization and deduplication, country-based batching, selecting detection layers, asynchronous task submission and Webhook reception, result field boundaries, and how to handle one-number-to-multiple-records and null overwrites when writing back to CRM.
How to Troubleshoot WhatsApp Number Screening Failures: Locate Errors and Misjudgments in Four Layers
When a batch of numbers returns widespread errors, invalids, or blank fields, it's usually not the detection itself but overlapping issues in file encoding, E.164 format, number type, and privacy fields. This article breaks down each layer's diagnostic criteria, fixes, and common misjudgments in troubleshooting order.
WhatsApp Business Number Verification: From List Cleaning to Business Account Field Processing Order
How to distinguish WhatsApp registration status and business accounts from a number list: E.164 cleaning, is_business field meaning, grouped export, Webhook CRM write-back, and privacy boundaries.
