Ringflow

Go local across Colorado today.

Colorado's tech corridor runs from Fort Collins through Denver to Colorado Springs — and it's growing fast. Pick from four area codes, activate in under 60 seconds, and take calls across the Mountain West on any device. No hardware. No contracts. Mountain Time routing built in from day one.

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Free 14-day trial — no credit card Number live in under 60 seconds MT routing built in
Colorado flagColorado · Live CoverageChoose a city — number updates liveLive
Your new number
(303) 555‑0142
0.3s
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MT
UTC−7
20+
Features
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Number provisionedLive in 0.4s · no hardware
JDIncoming · Jess D.(303) 555-0241 · Denver
Colorado area codes · CO coverage

Colorado's 4 area codes — covering the Front Range and beyond.

Colorado uses four area codes anchored to its distinct regions. The 303 and its overlay 720 serve Denver and the surrounding metro. The 719 covers Southern Colorado, including Colorado Springs and Pueblo. The 970 spans the northern cities of Fort Collins and Loveland, and stretches west across the mountains to Grand Junction. A local CO number on Ringflow connects your business directly to the markets driving Colorado's economy.

StateColorado (CO)
RegionMountain West
CapitalDenver
Largest cityDenver
Time zoneMT · UTC−7
Population~5.8M
Major marketsDenver · Colorado Springs · Aurora · Fort Collins · Boulder
Area codes4
Live coverage · All 4 Colorado area codes

4 area codes. Front Range to the Western Slope.

From Denver's startup scene to Boulder's research corridor, from Colorado Springs' defense and aerospace market to Fort Collins' university hub, Ringflow covers all four active Colorado area codes. Pick your code and activate the same day — Mountain Time routing included.

All 4 CO area codes — instant activation Mountain Time (MT / UTC−7) routing built in
Colorado · Live coverageOnline
4 area codes active Live availability — real time
All area codes · Colorado (CO)

4 Colorado area codes. Pick your market. 4 active

Every active Colorado area code is on Ringflow. Denver metro, Southern Colorado, the Front Range, or the Western Slope — find the code that puts you closest to your customers.

303

303 · Denver metro

Denver · Boulder · Lakewood · Englewood · LittletonColorado · CO
719

719 · Southern Colorado

Colorado Springs · Pueblo · Canon City · Fountain · TrinidadColorado · CO
720

720 · Denver metro (overlay)

Denver · Aurora · Westminster · Thornton · ArvadaColorado · CO
970

970 · Northern & Western CO

Fort Collins · Grand Junction · Loveland · Greeley · DurangoColorado · CO
Built-in features · Every Colorado number

Every feature on every Colorado number. No extras.

Every Ringflow CO number ships with call forwarding, two-way SMS, IVR, voicemail transcription, and live analytics — all Mountain Time aware. One plan, all features, no bolt-ons.

Connect & converse — wherever your team works.

Call forwarding — mobile, desk phone or laptop
Voicemail-to-email — AI transcripts in your inbox
Two-way SMS / MMS — text from your 303 number
Local caller ID — show CO on every outbound call
Setup guide · Under five minutes

Get your Colorado number in four steps.

No carrier paperwork. No IT team. Pick a CO area code, choose a plan, configure your routing, and your Colorado number is live — ready to represent your business on the Front Range and beyond.

01
Step one

Choose your area code

Targeting Denver metro? Go with 303 or 720. Colorado Springs or Pueblo? Pick 719. Fort Collins, Boulder, or the Western Slope? That's 970.

  • Filter by city or prefix
  • Port your existing CO number for free
  • Ringflow team available to advise
02
Step two

Select a plan

Starter, Professional, or Enterprise — every plan includes the full feature set. Monthly or annual billing, with no setup fees on any tier.

  • No setup fees on any plan
  • All features included from day one
  • Scale seats up or down anytime
03
Step three

Configure routing

Build your call flows, business hours, IVR menus, and voicemail with the drag-and-drop builder. Everything schedules on Mountain Time (MT / UTC−7) automatically.

  • Visual IVR builder — no code required
  • MT (UTC−7) scheduling built in
  • Forward to mobile, browser, or desk phone
04
Step four

Go live

Your Colorado number is active the moment setup is done. Customers dial a familiar CO area code. Your team answers from any device. Analytics start from call one.

  • Works on mobile app, browser, or desk phone
  • Live analytics and recordings from day one
  • 24/7 Ringflow support
Coverage directory · Browse by state

Browse area codes by state.

Pick a region, then select any state to see every active area code with city coverage, time zones and a number-picker shortcut.

Expanding into more states? See Connecticut area codes

FAQ · Colorado virtual numbers

Common questions about Colorado virtual phone numbers.

Quick answers on area codes, Mountain Time routing, activation speed, and porting your existing CO number.

Colorado has four active area codes: 303 (Denver metro and Boulder), 719 (Southern Colorado — Colorado Springs, Pueblo), 720 (Denver metro overlay), and 970 (Northern and Western Colorado — Fort Collins, Grand Junction, Loveland). All four are available on Ringflow.
303 is Denver's original code and the most recognized in the metro area. 720 is its overlay — both serve the same Denver metro geography. Either will signal strong local presence in Denver. If you're specifically targeting Boulder, 303 has the strongest association.
Yes. Ringflow virtual numbers give you genuine local CO presence — any of the four area codes — without a physical location or carrier contract. Calls route to any device, anywhere.
Under 60 seconds. Select your area code, confirm your plan, and the number is live and ready to take calls and texts before you leave the signup page.
Yes, and it's free. Porting an existing CO number typically completes in 3 to 7 business days with no service interruption. You keep your number and get all of Ringflow's features.
Built in. Business-hours routing, time-of-day call flows, and all analytics run on MT (UTC−7). If your team operates remotely from a different time zone, Ringflow handles the conversion automatically.

Front Range to Western Slope. Your CO number reaches every mile.

MT routing built in · All 4 CO codes available · Free number porting · No long-term contracts

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