SECONDFACTOR TOOLS
Free Phone Number Tools
Look up a phone number’s carrier or line type, check its format, or estimate what you would save on OTP delivery.
Free
Phone carrier check
Look up the carrier, country and calling code for a phone number.
Try carrier checkFree
Phone type check
Identify whether a phone number is mobile, landline, or VoIP.
Check phone typeFree
Phone number validation
Check whether a number matches its country’s format and numbering plan.
Validate numberFree
OTP savings calculator
Compare SecondFactor’s routed rate with Twilio Verify for any destination and volume.
Estimate savingsVerify phone numbers with OTP
Send an OTP and check the code to confirm a user has access to their number.