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
Articles tagged “HLR lookup”
3 articles.
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
Deliverability
SMS delivery receipts vs HLR lookup: before or after you send
A delivery receipt reports what happened after you sent an SMS. An HLR lookup asks the network before you send. What each can see, miss and cost.
7 min read
