The 321 area code covers Cocoa, Melbourne and 13 more places in Florida.
Area code 321 is in Florida, on Eastern Time. In the 321 area, phone numbers are given out most in Brevard County, then Orange and Seminole counties. It has been in service since November 1, 1999.
- Where
- 5 counties in Florida, mostly Brevard County, Orange County and Seminole County
- Time zone
- Eastern Time
- In service since
- November 1, 1999
- Shares its area with
- No other area code
- Prefixes in use
- 501
- How to dial
- Local calls need all 10 digits: 321-555-0142.
Find out who called you from a 321 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (321) number is on today, use our free carrier lookup.
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Cocoa holds 33% of the phone prefixes in area code 321.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 501 prefixes in use shows where 321 numbers are actually given out.
- Cocoa163 prefixes, 33%
- Melbourne85 prefixes, 17%
- Orlando71 prefixes, 14%
- Titusville35 prefixes, 7%
- Cocoa Beach26 prefixes, 5%
- Winter Park25 prefixes, 5%
- Sanford14 prefixes, 3%
- Kissimmee13 prefixes, 3%
Also served: Oviedo, Apopka, Saint Cloud and Geneva and 3 smaller places.
T-Mobile holds the most phone number prefixes in area code 321: 72 of 501.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 501 prefixes in use in 321 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| T-MobileMobile network | 72 | 14% |
| BellSouth (AT&T)AT&T's landline company | 70 | 14% |
| AT&T MobilityMobile network | 52 | 10% |
| PAETEC (Windstream)Windstream's business phone network | 46 | 9% |
| Level 3 (Lumen)Lumen's business and wholesale network | 43 | 9% |
| Metro by T-MobileT-Mobile's prepaid brand | 38 | 8% |
| 27 other carriers | 180 | 36% |
83% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
321 has covered the same ground since 1999.
1999
321 starts on November 1, 1999, split off from 407.
A 321 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 321 are 863, 813 and 772.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Florida has 22 other area codes.
These are the questions people ask most about area code 321.
Where is area code 321?
321 covers Cocoa, Melbourne, Orlando and Titusville and 11 more places in Florida. In the 321 area, phone numbers are given out most in Brevard County, then Orange and Seminole counties.
What state is area code 321 in?
Florida. 321 is a Florida area code on Eastern Time.
What cities use area code 321?
The places holding the most 321 prefixes are Cocoa, Melbourne, Orlando, Titusville, Cocoa Beach, Winter Park, Sanford and Kissimmee, out of 15 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 321?
No single phone company owns 321. NANPA's records show T-Mobile holds the most 321 prefixes, 72 of 501, followed by BellSouth (AT&T) and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 321 in?
321 is on Eastern Time.
When did area code 321 start?
321 went into service on November 1, 1999, when it was split off from 407.
How do I dial a 321 number?
Local calls need all 10 digits: 321-555-0142.
Is 321 a toll-free number?
No. 321 is a regular area code for Cocoa and Melbourne in Florida, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 321?
The closest are 863 (Lakeland, Florida), 813/656 (Tampa, Florida), 772 (Port Saint Lucie, Florida) and 352 (Gainesville, Florida), measured between the centres of each area.
Who called me from a 321 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 321 a scam?
321 is a real Florida area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.