A fax phone number is a standard telephone number connected to a fax machine or online fax service instead of a voice line. Learn what fax numbers look like, how they work, and 5 ways to get one — from free virtual numbers to dedicated business lines.
Frequently Asked Questions
Is a fax phone number the same as a regular phone number?
Yes — structurally, a fax phone number is identical to any telephone number. It uses the same 10-digit format (area code + 7-digit number) in the US. The only difference is what is connected to the line: a fax machine or online fax service answers instead of a person.
How do I get a fax phone number without a fax machine?
Sign up for an online fax service like [mFax](https://mfax.to). You receive a dedicated fax phone number (local or toll-free) instantly — no machine, no phone line, no hardware required. Send and receive faxes from your phone, browser, or email.
What does a fax phone number look like?
A fax phone number looks exactly like a regular US phone number: 10 digits with a 3-digit area code, such as (555) 123-4567 or 1-800-555-0100. There is no visual difference between a fax number and a voice phone number.
Can a regular phone number be used as a fax number?
Yes, if a fax machine (or fax software) is connected to that phone line. The challenge is that the line can only handle one type of call at a time — fax tones and voice calls are incompatible. Most people use a separate dedicated fax number or a virtual fax number to avoid conflicts.
How much does a fax phone number cost?
A virtual fax phone number from an online service like mFax costs as little as $7.99/month and includes a dedicated local or toll-free number. A traditional dedicated fax landline runs $25–$35/month plus the cost of a fax machine. Free fax numbers exist but are limited to receive-only with low page caps.