---
title: "Area code 321: Florida, United States"
url: "https://lookvalid.com/area-code/321.md"
canonical_url: "https://lookvalid.com/area-code/321"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 321 serves Florida, United States. Number formats, numbering rules, a live phone validator and the other codes in Florida."
---

# Area code 321: Florida, United States

Area code 321 serves Florida, United States. Number formats, numbering rules, a live phone validator and the other codes in Florida.

NANPA lists 497 central office codes (prefixes) in use in area code 321, held by 38 holders across 21 rate centers.
Southern Bell Tel & Tel holds the most prefixes, 70 (14%). 83% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 4,774 complaints on file for 3,305 numbers in 321, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1999-11-01
- Time zone: Eastern (E)
- Prefixes in use: 497
- Pooled prefixes: 412 (83%)
- Rate centers: 21
- Companies holding prefixes: 38
- Assignment dates on file: 2001-01-16 to 2026-05-22 (262 prefixes)
- ZIP codes in its places: 109

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| COCOA | 161 | 32% |
| MELBOURNE | 84 | 17% |
| ORLANDO | 71 | 14% |
| EAU GALLIE | 36 | 7% |
| TITUSVILLE | 34 | 7% |
| COCOABEACH | 26 | 5% |
| WINTERPARK | 25 | 5% |
| SANFORD | 14 | 3% |
| 13 other rate centers | 46 | 9% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Southern Bell Tel & Tel | 70 | 14% |
| Omnipoint Miami E License | 60 | 12% |
| New Cingular Wireless PCS | 51 | 10% |
| Paetec Itel | 46 | 9% |
| Metropcs Networks | 38 | 8% |
| Onvoy | 36 | 7% |
| 32 other carriers | 196 | 39% |

A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company.

## History

- 1988-04-16: Area code 407, named as the parent of 321 in the NANPA report, was in service.
- 1999-11-01: Area code 321 went into service.

## Nearest area codes

The area codes closest to 321, measured between the centers of the ZIP code places they serve, are 407 (about 8 miles), 689 (about 8 miles), 863 (about 62 miles), 656 (about 65 miles) and 352 (about 71 miles).

## ZIP codes

109 ZIP codes fall in places that have a rate center in this area code. The places with the most are Orlando, FL (59 ZIP codes), Melbourne, FL (10 ZIP codes) and Kissimmee, FL (9 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

4,774 complaints for 3,305 numbers. Numbers whose latest complaint falls in each year:

- 2023: 152
- 2024: 157
- 2025: 144

## Questions

### Where is area code 321?

NANPA assigns area code 321 to Florida, United States.

### In which state does area code 321 sit?

Florida. 321 is one of 23 area codes the NANPA table assigns to the state.

### Which places does area code 321 cover?

The places with the most ZIP codes among the rate centers in 321 are Orlando, FL, Melbourne, FL and Kissimmee, FL. The rate center list on this page shows all of them.

### Who owns area code 321?

NANPA assigns area codes. Within 321, Southern Bell Tel & Tel holds the most prefixes, 70 prefixes or 14%.

### Which time zone does 321 use?

The NANPA NPA report lists the time zone for 321 as Eastern (E).

### What year did 321 enter service?

The NANPA NPA report gives an in-service date of 1999-11-01, so 321 has been in use since 1999.

### Does area code 321 have an overlay?

The NANPA NPA report lists no other area code in an overlay with 321.

### Which area codes are nearest to 321?

The area codes closest to 321, measured between the centers of the ZIP code places they serve, are 407 (about 8 miles), 689 (about 8 miles), 863 (about 62 miles), 656 (about 65 miles) and 352 (about 71 miles).

### How many prefixes does area code 321 have?

NANPA's report dated 2026-10-17 lists 497 prefixes in service in 321, spread over 21 rate centers and 38 holders.

### Are there complaints about 321 numbers?

The FCC data on file has 4,774 complaints for 3,305 numbers in 321. They are unverified consumer reports. A number with no complaints on file is not proven safe.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).