If you use SMS one-time passwords (OTPs) to add a layer of risky IP address authentication to your Twilio application, it’s important to detect VoIP numbers before sending them. These numbers are often correlated with bots and can be a threat to your security.
Detecting VoIP Phone Numbers Before Sending OTP
You can easily use the Lookup API to detect fixed and non-fixed VoIP phone numbers. You can also combine it with the Verify API to filter out non-fixed numbers before sending an OTP.
Assessing Risky IP Addresses: Best Practices for Enhanced Cybersecurity and Fraud Prevention
Unlike landline or cell phone numbers, VoIP phone numbers are not assigned to physical locations but instead to people who are using them. This makes it difficult to trace a bad actor’s identity.
There are a few ways to identify the owner of a VoIP phone number, but the most popular is by using a CNAM (caller ID name) lookup. This identifier is connected to the caller ID and is much harder to fake than caller ID, making it an excellent tool for tracing VoIP numbers.
Reverse Phone Lookup Tools
Using a reverse phone lookup tool is the easiest and fastest way to find out who owns a VOIP number. They are free, easy to use and will give you the name and address most of the time. However, they aren’t always accurate and may not give you the information you need.