Free tools

Small things we built and give away: check how a US number is formed, or see what public complaints say about a number.


Free US phone number check

Check that a US phone number is well formed and see its area code, state and standard formats. In your browser, nothing sent.

  • Numbering plan
  • No sign-up
  • Nothing stored

Free spam number lookup

See the line type, the carrier a number block was first assigned to, and a risk level from public complaint reports.

  • Line type
  • Carrier
  • Risk level

About these tools

Free tools on this site do one small job well and show exactly what they checked.

  • Free US phone number check: Check that a US phone number is well formed and see its area code, state and standard formats. In your browser, nothing sent.
  • Free spam number lookup: See the line type, the carrier a number block was first assigned to, and a risk level from public complaint reports.

Each tool is free and needs no account.