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 “Carrier lookup”
5 articles.
Guides
HLR lookup vs MNP lookup vs number validation: what each one answers
Validation checks the digits, MNP finds the current network, HLR asks the network if the number is live. What each answers, costs and misses.
7 min read
Guides
How to check if a phone number is active (and what "active" really means)
Valid, active, reachable and registered mean different things. The methods for checking each one, what they cost and where every method falls short.
7 min read
Guides
Mobile number portability: why carrier lookups can be wrong
A number's prefix shows the network its range was given to, not the one serving it today. How porting works, where lookups fail and how to handle it.
7 min read
Fraud prevention
VoIP number detection for sign-ups: what works and what to watch out for
Why VoIP numbers matter at sign-up, fixed vs non-fixed VoIP, which signals detect them, and how to add friction without turning away real customers.
7 min read
