All area codes

303 area code

303 Phone Numbers for Sale

Browse and buy available 303 phone numbers associated with Denver. Compare memorable patterns and one-time listed prices. 112 303 numbers are currently available from $99 to $19,999 (median $349), including 56 triple-digit and 26 repeating-digit numbers.

  • Area code 303 is associated with Colorado
  • Time zone: Mountain Time
  • Cities describe numbering-plan coverage, not an Exclusive Digits office
  • Delivered by email after payment with the account number and transfer PIN the carrier asks for
  • Portable to Verizon, AT&T, T-Mobile and all major US carriers
AllensparkBennettByersDeckersDenverGeorgetownHudsonKeenesburg

Filter these numbers

Current inventory

Available numbers

112 matching numbers

Page 1 of 10

  • 112 303 numbers in stock
  • One-time price, no contract
  • Same-day delivery
  • Port to any carrier

Area-code profile

About the 303 area code

Location
Denver County, CO, Jefferson County, CO, Adams County, CO, and Boulder County, CO and 7 more counties
Time zone
Mountain Time
History
In service since 1947, one of the original North American area codes
Overlays
720 and 983 serve the same area as 303
Dialing
Local calls are dialed with 10 digits (1 + 10 digits also works)
Prefixes
800 exchange prefixes in use, held by 29 carriers
Map of the 303 area codeShaded area shows where 303 numbers are rated, with neighboring area codes outlined around it.970719DenverLongmontDeckersGeorgetownKeenesburgByers
Approximate 303 coverage from U.S. Census ZIP code areas and NANPA rate centers.

Cities and communities in 303

Denver, Longmont, Deckers, Georgetown, Keenesburg, Allenspark, Hudson, Byers, Strasburg, Bennett, Roggen

ZIP codes in the 303 area code

146 ZIP code areas. Area codes follow telephone exchange boundaries rather than ZIP code lines, so ZIP codes near the edge can also be served by a neighboring area code.

Denver County, CO (31)

80202, 80203, 80204, 80205, 80206, 80207, 80209, 80210, 80211, 80212, 80216, 80218, 80219, 80220, 80222, 80223, 80224, 80230, 80231, 80236, 80237, 80238, 80239, 80246, 80247, 80249, 80264, 80266, 80290, 80293, 80294

Jefferson County, CO (27)

80002, 80003, 80004, 80005, 80007, 80021, 80033, 80123, 80127, 80128, 80214, 80215, 80226, 80227, 80228, 80232, 80235, 80401, 80403, 80419, 80425, 80433, 80453, 80454, 80457, 80465, 80470

Adams County, CO (20)

80011, 80019, 80022, 80024, 80030, 80031, 80045, 80102, 80103, 80136, 80221, 80229, 80233, 80234, 80241, 80260, 80601, 80602, 80603, 80640

Boulder County, CO (18)

80025, 80026, 80027, 80301, 80302, 80303, 80304, 80305, 80310, 80455, 80466, 80471, 80481, 80501, 80503, 80510, 80540, 80544

Show 7 more counties (50 ZIP codes)

Arapahoe County, CO (16)

80010, 80012, 80013, 80014, 80015, 80016, 80017, 80018, 80110, 80111, 80112, 80113, 80120, 80121, 80122, 80137

Douglas County, CO (13)

80104, 80108, 80109, 80118, 80124, 80125, 80126, 80129, 80130, 80131, 80134, 80135, 80138

Weld County, CO (10)

80514, 80516, 80520, 80530, 80621, 80642, 80643, 80644, 80649, 80652

Clear Creek County, CO (6)

80436, 80438, 80439, 80444, 80452, 80476

Broomfield County, CO (2)

80020, 80023

Park County, CO (2)

80421, 80475

Gilpin County, CO (1)

80427

Area codes that share 303’s area

720983

Neighboring area codes

970719

Explore related numbers

repeating numbershundreds numberssequential numbersColorado numbers719 area code720 area code970 area code983 area code

Explore the live catalog

Use these crawlable collections to move from research to currently available listings.

Vanity phone numbersBrowse numbers that spell usable words.Repeating numbersCompare recognizable rhythms and repeated digits.Round thousandsFind clean endings such as 3000 and 7000.All number patternsEvery recognizable digit pattern we categorize.Numbers by area codeStart with a local market or recognizable code.Numbers by stateBrowse every area code associated with a state.Numbers by industryExplore words and formats suited to a business type.Inventory insightsSee aggregate catalog depth and pricing statistics.212 market reportUse citable 212 catalog counts, price bands, and monthly archives.Buying guidesHow buying, transferring, and choosing a number works.Number toolsCheck patterns and convert vanity words before you buy.