Selling used skis or a bike brings a lot of calls.
Post the gear with a 303 number. When it is sold, burn the number and the late callers reach nothing.
Local 303 numbers
Get a 303 phone number for Denver and Boulder.
Ask for 303 when you create a number on ExpressNumber, and the number you hand out reads as Denver and Boulder. It rings the phone you already carry, and you burn it when you no longer want the calls.
$0 todayLive in about a minute
This is how you get a 303 number.
- Start your 7 days free and open Create a number.
- Type 303 as the area code and give the number a name.
- Hand it out. Calls ring the phone you already carry, and texts land in your inbox.
- Burn it in one tap when you are done. Calls and texts to it stop at once.
9:41
Your numbers
Skis for sale
(303) 555-0128
Forwarding
Roommate search
(303) 555-0165
Forwarding
Roof quote
(303) 555-0197
Blocked
People ask for 303 because it is the oldest Denver code.
A roommate search means strangers with your number.
Give them one that rings your phone today and does not exist next month.
Hail and roof repair quotes come with follow-up calls.
Put each company on its own number, and end the ones you did not choose.
This is where a 303 number is from.
Area code 303 covers the north-central part of Colorado, which is the Denver metropolitan area.
Along with Denver that includes Aurora, Lakewood, Englewood, Littleton, Wheat Ridge, Westminster and Thornton, as well as Boulder, Longmont, Brighton, Highlands Ranch and Castle Rock.
Denver and Boulder, CO
Area code 303 and the codes around it, oldest first.
1947
303
This code
1988
719
Split off
1995
970
Split off
1998
720
Shares the area
2022
983
Shares the area
- Denver
- Aurora
- Boulder
- Lakewood
- Littleton
- Englewood
- Westminster
- Thornton
- Longmont
- Castle Rock
- Highlands Ranch
These are the facts about area code 303.
From the public records of the body that runs US phone numbering, read October 13, 2026.
- Place
- Denver and Boulder, Colorado
- In service since
- 1947
- Local calls are dialed with
- Ten digits
- Shares its area with
- 720 (1998) and 983 (2022)
- Codes split from it
- 719 (1988) and 970 (1995)
303 is one of the original codes of 1947. 719 was split from it in 1988 and 970 in 1995.
Two codes were then laid over the area that remained: 720 in 1998 and 983 on June 17, 2022. All three cover the same ground, and a local call is dialed with ten digits.
Try it free for 7 days.
Then pick the plan that fits how many numbers you hand out.
Basic
7 days free$9.99/mo
- 5 numbers, one for each site, store or dealer
- 100 forwarded minutes a month
- Burn a number in one tap
- Extra numbers $1 a month each
Pro
7 days free$29.99/mo
- 100 numbers
- 1,000 forwarded minutes a month
- A number per vendor, client or listing
- Extra numbers 50¢ a month each
$0 today. Monthly plans, cancel any time.
People ask these questions about getting a 303 number.
More in the full FAQ.
Create a number in your dashboard, type 303 as the area code and give it a name, such as Skis for sale. It is live in about a minute. You do not need to live in Colorado: calls ring the phone you already carry.
Yes, for taking calls and texts. A roofer, a ski tuner or a house cleaner can put a 303 number on the flyer and the website, take the calls on their own phone and set it to Texts only in the off season.
Yes. 720 was laid over the 303 area in 1998 and 983 in 2022, so all three cover Denver, Aurora, Boulder, Lakewood, Littleton, Longmont and Castle Rock.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
You get 7 days free and pay $0 today. After 7 days your plan starts: $9.99 a month for Basic or $29.99 a month for Pro. Cancel before then and you pay nothing.
More area codes
Every fact on this page comes from public numbering records.
The state, the dates and the related codes are rows of the North American Numbering Plan Administrator's area code database. The places are from its planning letters. Read October 13, 2026.
Put 303 on a number you can burn.
Hand out a number you can burn. Keep the one your family calls.
Try it free for 7 days