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US area code · Florida

321 area code

Where the 321 area code is, its overlay and how to dial a +1 321 number from anywhere.

CoversAltamonte Springs, FloridaTime zoneEastern (ET)TypeGeographic
Quick answer

The 321 area code is in Altamonte Springs, Florida, United States (Eastern (ET)). To call from abroad: +1 321 555-0123.

StateFlorida
Main areaAltamonte Springs
Time zoneEastern (ET)
TypeGeographic
10-digit dialingRequired
In service since10-Feb-1999

The 321 area code is a geographic North American Numbering Plan (NANP) code covering Altamonte Springs, Florida. It has been in service since 10-Feb-1999 and sits in the Eastern (ET) time zone.

How to dial a 321 number

From abroad+1 321 555-0123
Within the US / Canada1 321 555-0123
Locally (same area)321 555-0123

Cities in the 321 area code

A 321 number is usually in one of these places in Florida — 6 counties.

Altamonte Springs SeminoleCasselberry SeminoleKissimmee Osceola;PolkMerritt Island BrevardOak RidgeOcoee OrangeOrlando Brevard;OrangeOviedo SeminolePalm Bay BrevardPine HillsRockledge BrevardSaint Cloud OsceolaSanford SeminoleSouth ApopkaTitusville BrevardUniversity ParkWekiwa SpringsWest MelbourneWinter Park OrangeWinter Springs Seminole

Other Florida area codes

239305324352386407448561645656689727728754772786

Frequently asked questions

Where is the 321 area code?

The 321 area code is in Altamonte Springs, Florida, United States (Eastern (ET)).

Do I have to dial 10 digits for 321?

Yes — dial the area code plus the seven-digit number.

How do I call a 321 number from another country?

Dial your exit code (or +), then 1, then 321, then the number: +1 321 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 321 number does not pinpoint a street or ZIP code.

Number holders in area code 321

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 515 prefixes are in use in 321, shared by 40 companies. The largest holders:

CompanyPrefixesShare
Bellsouth Telecomm Inc Dba Southern Bell Tel & Tel7014%
Omnipoint Miami E License, LLC5911%
New Cingular Wireless PCS, LLC5210%
Paetec Itel, LLC469%
Onvoy, LLC398%
Metropcs Networks, LLC398%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 321 numbers

Reports to the FTC, last 30 days
1,811
Recorded messages or robocalls
84%
Rank among area codes
#9 of 670
Most reported subjects
Reducing your debt (credit cards, mortgage, student loans) (569)
Other (563)
Calls pretending to be government, businesses, or family and friends (139)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 321 — cities & rate centres

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