Do I need a separate fax number to use an online fax service

[brianj]

Most online fax services assign you a new fax number, but some allow you to port your existing number. You cannot use a regular voice phone number directly — it needs to be a dedicated fax line or a number the service supports for porting.

[jakef]

Actually, I had the same exact worry when I switched to an online service. Here’s what I learned from doing it myself: you absolutely do not need a separate fax line. You can just use your existing phone number, because the online fax service basically “translates” that number into a digital signal behind the scenes. Most providers, including mFax, let you keep your current number or even port an old one over. I felt silly for overthinking it until I realized how simple the real process is—like when you send a fax from your phone by just snapping a picture of a document and hitting send. No extra hardware, no second bill from the phone company. The only catch is that if you’re using a landline number for voice calls, you might miss calls while a fax comes in, but with online services that’s rarely an issue since everything routes through the cloud anyway. Just pick a provider, keep your number, and don’t make it harder than it needs to be.