Can I embed this checker on my own site?

Yes — the embed snippet below drops in an iframe with attribution. It's free to use on blogs, forums, and community wikis.

Is my number stored anywhere?

No. The check runs client-side against public line-type heuristics and nothing is logged or sent to our servers.

Free VoIP Number Checker

Find out if a number will get rejected before you waste a verification attempt. Built and maintained by GotSMS — free to use, free to embed.

Line-Type Diagnostic

Embed this tool

Add a live line-type checker to your own blog, forum, or documentation:

<iframe src="https://gotsms.org/en/tools/voip-checker?embed=1"
  width="100%" height="420" frameborder="0"></iframe>

We run the number through the same class of carrier-lookup signals (HLR/line-type databases) that platforms like OpenAI, Tinder, and PayPal use to reject virtual numbers before verification. It's a diagnostic simulation, not a live carrier query — for a guaranteed-clean number, rent a dedicated physical line directly.