Is a fax number the same as a phone number? In form, yes: it is a normal telephone number, ten digits in the United States, and a business often has its fax line next to its voice line with only the last digit different. In use, no: a fax number is answered by a machine or a service that expects fax tones, so calling it gets a screech and texting it gets nothing. This page answers the versions of the question that reach this site and says what to do when you have a fax number and only a phone.
Is a fax number a phone number
It is a phone number in every sense the telephone network cares about. It is allocated from the same numbering plan, routed the same way, and can be ported between carriers like a voice line. A business may run its fax on a separate physical line, on the same line with a switch that detects fax tones, or on no line at all through an online service that answers a number in a data center. What differs is only what answers. So is fax number same as phone number is best answered: same kind of number, different kind of listener. That is why offices print both on letterhead and why dialling the wrong one wastes everyone's time.
Can you call a fax number
You can dial it, and it will connect, and what you will hear is the fax handshake: a series of tones that the answering device sends to negotiate with what it assumes is another fax. A person calling hears noise and hangs up. Some offices run fax and voice on one line with a switch that listens for tones and routes the call, so calling that number may reach a receptionist, but a dedicated fax line never will. If you need to speak to someone, look for the voice number beside the fax number. If you need to send pages, use a fax service, not a phone call. Can i call a fax number to test whether it works is a fair use: tones mean the line is live.
Can you text a fax number
No. A text message travels over the mobile network's messaging service to a handset; a fax number is a landline or a service's number that has no messaging capability, so the text is either rejected or silently dropped. The reverse is also true: a fax cannot be sent to a mobile number that has no fax service behind it. The way to get a document from a phone to a fax number is an online fax app, which takes a photo or a PDF and places a real fax call from the vendor's lines; plans with a number of your own start at Fax.Plus's printed $6.99 a month, and one-time senders will transmit a few pages without any account.
Other questions people ask
Can a phone number and a fax number be the same?
Yes, where the line has a switch that detects fax tones and routes the call, or where an online service forwards voice calls. A dedicated fax line only answers as a fax.
What happens if I fax a phone number?
The person who answers hears tones and hangs up, and the sender's report shows a failure. Check the number is the fax line before resending.
How do I send a document to a fax number from my phone?
With an online fax app: photograph or upload the pages, type the number, send. The app's vendor places the call and returns the delivery report.
Can I call a fax number to test it?
Yes. Fax tones mean the line is live. A person answering means it is a voice line, or a shared line with a switch that routes calls.