Virtual Fax Number: How to Get One & Why You Need It

By David Thompson · Published December 31, 2024 · Updated June 8, 2026 · 7 min read

Quick Answer: A virtual fax number is a cloud-based fax number tied to your email or app — not a phone line. You can get one from mFax Business in under 5 minutes, starting at about $9/mo (billed annually).

A virtual fax number does everything a traditional fax line does — only without the machine, the phone line, or the monthly telecom bill. You get a real fax number that other people can fax to, and every incoming fax lands in your inbox or app. You send outbound faxes the same way: upload a document, type the number, hit send.

Businesses across healthcare, legal, real estate, and finance rely on virtual fax numbers to replace aging fax infrastructure. This guide explains exactly what a virtual fax number is, how to get one, and which service to choose.

What Is a Virtual Fax Number?

A virtual fax number is a standard telephone number — local or toll-free — that routes faxes through the internet instead of a copper phone line. When someone faxes your virtual number, the signal hits a cloud server rather than a physical machine. That server converts the incoming fax into a PDF and delivers it to your email inbox or mobile app.

The number looks and behaves exactly like any other fax number. The person sending to you doesn't need to know — or care — how your fax infrastructure works. From their end, it's just a number they dial.

What makes it "virtual":

• No dedicated phone line required
• No fax machine or multifunction printer needed
• Works from any device — phone, tablet, or laptop
• Number is assigned to an account, not hardware
• Faxes are stored as PDFs in the cloud

Local vs. Toll-Free Virtual Fax Numbers

When you sign up for a virtual fax service, you typically choose between two number types:

Most businesses start with a local number matching their city. If you operate nationally — or just want to project scale — a toll-free number works well.

How to Get a Virtual Fax Number in 5 Steps

Getting a virtual fax number takes under 10 minutes with a modern provider. Here's how it works with mFax Business:

Why Get a Virtual Fax Number?

If you're currently faxing via a physical machine or a legacy phone line, here's what you gain by switching to a virtual number:

You Can Receive Faxes Anywhere

With a traditional fax line, documents pile up on a machine in one physical location. A virtual number routes every incoming fax to your email or app — immediately, wherever you are. A doctor can receive patient records on their phone. A lawyer can review signed contracts from an airport.

No Machine Maintenance

Fax machines jam, run out of toner, and break at the worst moments. Virtual numbers eliminate the hardware entirely. Your "fax machine" is a cloud server with 99.9% uptime.

Multiple Users, One Number

Traditional fax lines are single-user by nature — one line, one machine, one inbox. Virtual fax accounts support shared team inboxes. Everyone on the team sees incoming faxes in real time, and you can assign faxes to specific people.

HIPAA Compliance (for Healthcare)

Physical fax machines are a compliance liability — faxes sit on an output tray visible to anyone walking past. Virtual fax numbers with a signed Business Associate Agreement (BAA) meet HIPAA's technical safeguard requirements. Encryption, access controls, and audit logs come built in with business-grade providers.

Cheaper Than a Dedicated Phone Line

A POTS (plain old telephone service) fax line runs $40–80/mo just for the line, before long-distance charges. Virtual fax numbers start at $10–20/mo and include hundreds of fax pages per month — usually far more than a typical business needs.

Virtual Fax Number Providers Compared

What to Look for in a Virtual Fax Provider

Not all virtual fax numbers are created equal. Here's what matters:

• ✓Number availability: Can you get a local number in your area code? Does the provider offer toll-free numbers?
• ✓Page limits: Check pages included per month and overage rates. A medical practice faxing daily needs 500+ pages; a freelancer might need 50.
• ✓HIPAA compliance: If you handle Protected Health Information (PHI), your provider must offer a signed BAA. Not all do.
• ✓Delivery format: Incoming faxes should arrive as PDFs via email and be searchable in a web dashboard. Avoid services that only support TIF/TIFF.
• ✓Send confirmation: Every outbound fax should generate a delivery receipt with a timestamp and confirmation status.
• ✓Team features: For business use, look for shared inboxes, user management, and permission controls.

Virtual Fax Numbers for Specific Use Cases

Healthcare & HIPAA

Healthcare providers need a provider that offers a signed BAA, encryption in transit and at rest, and audit logging. Learn what makes a fax service truly HIPAA compliant before choosing. mFax Business is built with these requirements in mind.

Legal

Law firms need reliable delivery confirmation and the ability to send multi-page documents (discovery packages, pleadings). Look for a provider with high page limits and PDF fax receipts that hold up for recordkeeping.

Real Estate

Agents often need to fax signed documents quickly — purchase agreements, disclosures, addenda. A virtual fax number on your phone means you can send a contract from a showing without hunting for a fax machine.

Small Business

For small businesses, the main benefits are cost savings and flexibility. A virtual fax number at $20/mo replaces a $60/mo fax line and eliminates machine maintenance. You also get a permanent, portable number that doesn't change if you move offices.

Personal Use: Is a Virtual Fax Number Worth It?

For occasional faxing — sending a W-9 once a year, faxing a form to your doctor — you probably don't need a permanent virtual fax number. Use a pay-per-fax service like the mFax app to send individual faxes without a subscription.

A permanent virtual fax number makes sense when:

• You regularly receive faxes (a dedicated number gives clients a consistent place to send to)
• You fax more than 10–15 pages per month
• You need a professional-looking fax number for a business

Get Your Virtual Fax Number with mFax Business

mFax Business gives you a dedicated local or toll-free virtual fax number, HIPAA-ready infrastructure, a web dashboard, and team accounts — starting at about $9/mo. Unlike providers that box you into fixed tiers, mFax Business lets you build your own plan: choose the exact seats and pages you need with a live calculator and pay only for what you use. Setup takes under 5 minutes. No hardware, no phone line, no waiting.

For personal faxing, download the mFax app — upload a PDF or snap a photo and send a fax in under 2 minutes, no subscription required.

Related guides:

• How to Receive a Fax Online: Virtual Fax Number Setup
• HIPAA Compliant Fax: The Complete Guide
• Best HIPAA Compliant Fax Services in 2026
• How to Fax from a Computer