Guides
Carrier and line type lookup, explained
What carrier and line type data is, allocated vs current network, how porting changes it, and how to read every field of a carrier lookup answer.
8 min read
Articles tagged “Data quality”
6 articles.
Developers
E.164 phone number format: a practical guide for developers
How to normalize phone numbers to E.164 in JavaScript and Python, the pitfalls that break deduplication, and how the MobileValidate API normalizes input.
8 min read
Developers
E.164 regex: why a pattern is not enough to validate phone numbers
The common E.164 regex accepts impossible numbers. Real counterexamples, the shortest valid international numbers, and what to use a regex for instead.
7 min read
Deliverability
How to clean a phone number list in bulk, step by step
A step-by-step way to clean a phone list with the MobileValidate jobs API: free estimate, dedupe, invalid rows, capped cost, CSV download and data purge.
7 min read
Research
How often do phone numbering plans change? 2019–2026 data
We counted 182 phone-metadata releases from 2019 to 2026: a median of 14 days apart, and 230 of 245 regions changed. Why validation goes stale.
8 min read
Guides
How to evaluate a phone number validation API: a buyer's checklist
The criteria that matter when you choose a phone-intelligence API: coverage, conclusive rates, unknown billing, latency, freshness, privacy and test mode.
9 min read
