Denver's three area codes all cover the same Front Range metro, from Boulder to Aurora. Pick your Denver number and Allo adds an AI receptionist, call recording and summaries synced to your CRM.
303, 720 and 983 are overlays that serve the same Denver metro area, including Boulder, Aurora and Lakewood.
Areas are approximate. Codes that overlay each other share the same area.
Get (303) XXX-XXXX when you join Allo
Allo answers, routes and writes up every call on it, from day one.
You pick your exact number from the ones available when you sign up.
Denver attracts ambitious companies, and customers here compare options carefully.
Startups in RiNo, outdoor brands in Boulder and builders in Aurora all compete for the same local buyers. Tech, aerospace, energy and construction keep phones busy across the Front Range. A Denver number shows you are part of the metro and ready to pick up.
All three Denver codes serve the same area, so the choice is about familiarity.
303 is the original Denver code, in use since 1947, and it is the one longtime Coloradans recognize first. 720 arrived in 1998 and 983 in 2022, both overlaying the same metro from Boulder to Aurora and Lakewood. New numbers usually come from the newer codes, and all three read as Denver.
Allo keeps your Denver line covered, even when your team is out of the office.
An AI receptionist answers 24/7 and captures each caller's details. Calls route by your rules, get recorded and come back as AI summaries in HubSpot, Salesforce or Pipedrive. You can text from the same number and use it on the desktop or mobile apps.
The number gets you picked up. Allo handles everything after that.
A local area code your prospects recognize means more calls get answered and more callbacks come through.
The AI receptionist picks up when your team can't, answers questions, qualifies the lead and books the meeting.
Ring your team together or one after another, with business texting built in, so no call slips through.
Recording, summary and next steps land in your CRM automatically, so follow-up is done before you hang up.
Tell us the number you have in mind. If it is available, we will set it aside for you. If it is already yours, we will move it to Allo for you.
Ask for a numberDenver uses 303, 720 and 983, which all cover the same metro area, including Boulder, Aurora and Lakewood. Denver is on Mountain Time.
You pick from the Denver numbers available at signup. If you want a 303 in particular, the Allo team can look for a specific number.
No. A Denver number on Allo does not require a Colorado office, and you can use it anywhere through the apps.
Yes. 983 is the newest Denver code, added in 2022 as an overlay on 303 and 720 for the same metro area.
