One API. Every phone signal.
Each product below is a facet of a single Qualmie lookup — call one endpoint and get exactly the signals you need, no separate products or bills.
Validate & verify
Confirm a number is real, active, and reachable before you use it.
Liveliness
Is this number active right now?
Confirm a number is well-formed, assigned, and live on a carrier network at request time — not just correctly formatted.
Reachability
Can it receive a call or SMS today?
Know whether a live number can actually take a call or text before you spend on delivery or dialing.
Identify & enrich
Add carrier, line type, portability, and risk intelligence to any number.
Line & Carrier
Who carries it, and what kind of line?
Resolve the current carrier, country, and line type — mobile, landline, VoIP or toll-free — including ported numbers.
Risk Signals
Is this number risky?
Score fraud and abuse risk from disposable, VoIP, and recently-disconnected signals — before a bad number costs you.
Caller Identity
Who's behind the number?
Reverse a phone number to an associated name and identity signals. In active development.
Start with 500 free lookups
No credit card. Every signal included. $0.004 per lookup after.