Colorado fax numbers and area codes
Colorado has 6 area codes in service, and FaxToFax had local fax numbers in 4 of them when we last checked. Send and receive faxes in your browser, with no fax machine or phone line.
- Area codes6
- In stock4
- Time zoneMountain
- CapitalDenver
Colorado on the map of the United States. Select any state to open its page.
Colorado area codes
Colorado has 6 area codes. Codes on the same line cover the same place (overlays), so any of them works for a local number there.
- 303None in stock
- 720In stock
- 983In stock
Denver, Boulder, Aurora and the Denver metro area All 3 codes cover the same area.
- 719In stock
Colorado Springs, Pueblo and southern Colorado
- 970In stock
- 748None in stock · new 2025
Fort Collins, Greeley, Grand Junction, Vail, Aspen and northern and western Colorado Both codes cover the same area.
Local fax numbers in stock None in stock right now
Newest: 748 (July 2025, added to 970).
Area codes in service from NANPA, the North American Numbering Plan Administrator (October 22, 2026). Stock checked October 22, 2026; it changes daily, and the number picker shows what’s available when you sign up.
Sending a fax to Colorado
- Upload a PDF, PNG or JPG, or write a cover page with your letterhead.
- Choose United States as the recipient’s country and type the 10-digit fax number, for example (720) 555-0123.
- Check the number and send. You get a time-stamped delivery receipt.
Each page sent to Colorado uses 1 plan page from a US or Canadian number, and a fax that isn’t delivered doesn’t use any.
Receiving faxes in Colorado
Choose a number with a Colorado area code (719, 720, 970 and 983) or a toll-free number. People fax it from any fax machine, and each fax lands in your private, encrypted FaxToFax inbox with an alert.
Moving an existing number to FaxToFax (porting) isn’t available yet.
Time zone. Colorado is on Mountain Time. If you fax Colorado offices from another time zone, schedule faxes for their business hours.
Healthcare and legal offices in Colorado
Healthcare ›
Clinics, labs and pharmacies in Colorado still exchange referrals, records requests and prior authorizations by fax. If your office handles protected health information, HIPAA applies wherever you are in the US. FaxToFax stores faxes encrypted, records every view and download in an audit log, and deletes faxes on the schedule you set. A Business Associate Agreement is available on Business plans.
Legal ›
Law offices fax notices, signed documents and records requests when they need a sender, a time and a receipt. Lawyers in Colorado must protect client confidences under the state’s rules of professional conduct. FaxToFax puts your letterhead on cover pages, keeps a delivery receipt with every fax, and limits who can open faxes with access roles.
FaxToFax provides tools that support compliance; each office remains responsible for its own obligations. The Trust Center lists the programs we currently meet.
Colorado fax FAQ
Can I get a Colorado fax number?
Yes. When we last checked (October 22, 2026), FaxToFax had local fax numbers in 4 of the 6 area codes Colorado uses: 719, 720, 970 and 983. You pick your number when you sign up, and you can choose a toll-free number instead.
What area codes does Colorado use?
Colorado has 6 area codes in service: 303, 719, 720, 748, 970 and 983.
What time zone is Colorado in?
Colorado is on Mountain Time.
How do I send a fax to Colorado?
In FaxToFax, choose United States as the recipient’s country and type the 10-digit fax number, for example (720) 555-0123. Each page uses 1 plan page from a US or Canadian number, and you get a time-stamped delivery receipt.
Can I move my current Colorado fax number to FaxToFax?
Not yet. Moving an existing number (porting) isn’t available yet, so you’d choose a new FaxToFax number and give it to the people who fax you.
