Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — AREA-CODE/321

321 area code

Area code 321 is in Florida. It covers Orlando, Alafaya, Melbourne and 79 other places: 135 ZIP codes in Orange, Brevard, Osceola and 4 other counties. Local time there is , Eastern Time. In service since 1999, with no overlay.

State
Florida
Time zone
Eastern
Largest city
Orlando
Overlays
none
In service since
1999
Rate centres
21
Prefixes assigned
501 (5,010,000 numbers)

Who calls from a 321 number

NANPA records the carrier each block of 321 numbers is assigned to. Of the 5.0 million 321 numbers assigned, 43% are with cable, internet-calling, business and other carriers (Onvoy, Bandwidth and Level 3); 42% with mobile carriers (T-Mobile and AT&T Mobility); 13% with local phone companies (AT&T); 1% with paging companies.

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 321 numbers
CarrierKindShare
T-MobileMobile24%
AT&TLandline13%
OnvoyCable, VoIP, other12%
AT&T MobilityMobile12%
BandwidthCable, VoIP, other8%
Level 3Cable, VoIP, other6%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 321

The 17 places with a telephone rate centre of their own using 321, largest first. Each links to its ZIP codes.

Places in area code 321
PlaceZIP codesPopulation
Orlando, FL 59 319,758
Melbourne, FL 10 86,576
Kissimmee, FL 9 81,479
St. Cloud, FL 5 65,130
Sanford, FL 3 63,730
Apopka, FL 3 58,232
Titusville, FL 4 49,385
Winter Garden, FL 3 47,872
Oviedo, FL 3 40,599
Winter Park, FL 4 30,274
Cocoa, FL 5 19,554
Celebration, FL — 13,667
Cocoa Beach, FL 2 11,377
Geneva, FL 1 3,441
Montverde, FL 1 2,249
Kenansville, FL 1 1,176
Lake Buena Vista, FL — 15

Nearby places using 321

These places have no rate centre of their own in NANPA's records; the nearest one uses 321. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 321

135 ZIP codes in 33 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 321 numbers are issued

NANPA's rate centres with the most 321 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 321
Rate centrePlacePrefixes
COCOA Cocoa 163
MELBOURNE Melbourne 85
ORLANDO Orlando 71
EAU GALLIE — 36
TITUSVILLE Titusville 35
COCOABEACH Cocoa Beach 26

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 321

Where is area code 321?

Area code 321 is in Florida. It covers Orlando, Alafaya, Melbourne and 79 other places: 135 ZIP codes in Orange, Brevard, Osceola and 4 other counties.

What ZIP codes are in area code 321?

135 ZIP codes, by the town each is mailed to: Orlando (59, 32801 to 32899), Melbourne (10, 32901 to 32941), Kissimmee (9, 34741 to 34759), St. Cloud (5, 34769 to 34773) and 29 more towns. The full list is on this page.

What time zone is area code 321 in?

Eastern time.

Is a 321 number a mobile or a landline?

It can be either. 42% of 321 numbers are assigned to mobile carriers and 13% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

Does a 321 number mean the caller is in Florida?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 321 call can come from anywhere.

Other area codes in Florida

All 23 Florida area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 321.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/321

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