Fax Number
Format Checker

In international format, enter +1 followed by the area code and seven digit local number. For example, (212) 555-0123 becomes +12125550123.

It depends on the sending service or phone system. A web form that accepts international notation can use +1 for a US destination. A physical fax machine follows the dialing rules for its line.

It checks whether the number fits the numbering plan. Confirm line availability and ownership directly with the receiving office.

Yes. You can paste a formatted number and copy the normalized version with the country code and digits.

Yes. Enter the number starting with + and its country code. The result checks the numbering format for that destination.

Enter the fax line itself. If the recipient gave you an extension or access code, ask how its fax line should be dialed.

Use the spaced number to read it back and check the digits. Select Copy number for the compact international format, also called E.164.

Check for missing digits, a mistyped country code or an extension in the same field. If it still fails, ask the recipient for the full fax number.

Use +1 followed by the ten digits of the Canadian number, including its area code.

No. Enter the number and copy the result directly from the page.