UCaaS built for every U.S. state — HD calling, team meetings, messaging, and more, all on Colorado's 4 area codes. No hardware. No contracts. Live in minutes.
Colorado was assigned area code 303 in 1947, covering the entire state. Rapid Front Range growth triggered the first split in 1995 when 719 was created for Colorado Springs, Pueblo, and the southeastern region.
Denver's continued tech and aerospace boom drove the creation of 720 in 1998 as an overlay for the entire 303 territory. Southern and rural Colorado retain 719, while 970 serves the Western Slope and northern plains.
Today Colorado is anchored by Denver, home to a population of around 5.9M, and its aerospace & defense sector keeps demand for local numbers high. Whether you are opening a Denver office or supporting customers statewide, a CO number keeps your business instantly recognisable across all 4 area codes — and with Ajoxi you can run every one of them, plus calling, video, and messaging, on a single platform.
Denver's 303 became one of the most coveted area codes in the 1990s tech boom — startups treated a 303 number as a badge of Front Range credibility before 720 was introduced as an overlay.
Colorado's 4 area codes cover the full state — from Denver to Golden and everywhere in between.
A Colorado number tells customers you are established in their market — no physical office or long lead time required.
Provision a Colorado number, complete quick verification, and start taking calls the same day — no carrier ticket, no desk phones.
Calls ride carrier-grade routes with full STIR/SHAKEN attestation — your Colorado number lands as a real business, not "spam likely."
Your number is yours. Port it in, port it out, no lock-in — with recording, IVR, and the AI assistant on every line.
Choose the Colorado area code your customers already recognize — any of the 4 active codes.
Complete quick identity verification. No carrier ticket, no desk phones, no waiting on hardware.
Start taking Colorado calls and texts the same day, with recording, IVR, and the AI assistant on every line.
Showing 282 area codes across 51states & territories.
Yes — hold numbers across every Colorado code on a single Ajoxi account, one dashboard, one bill.
Yes. Calling, video meetings, and chat run in the browser on any device, so Denver, Colorado Springs, and Boulder share one system.
Yes — port any 303, 720, 719, or 970 number into Ajoxi for free, usually within a few business days with no downtime.
HD calling, video meetings, team chat, SMS/MMS, auto-attendant, call recording, and an AI assistant on every line.
Pick what customers know: 303/720 for Denver, 719 for Colorado Springs, 970 for the Western Slope — provisioned in minutes.
Provision a local number on any Colorado area code — instant activation, clean caller ID, Tier-1 routing, and no setup fees.