Area codes · +1
Area code 321
Area code 321 is centred on Cocoa, Florida. We hold 4,639 allocated blocks for it across 21 rate centres, split 47% mobile, 41% landline and 13% VoIP.
The other area codes laid over 321
Area code 321 does not have Cocoa to itself. 2 other codes — 407, 689 — serve the same rate centres, laid over the same ground rather than dividing it. That is an overlay: a new code added when the old one ran out of numbers, covering the same streets. Two neighbours can hold different area codes, so the code says roughly when a number was issued rather than where it sits.
Each holds its own blocks and its own carrier mix, so a 321 number and a 407 number from the same street can report different line types. Filtering Cocoa by area code needs all 3 of them.
321 is not confined to Cocoa itself: its blocks sit across 21 rate centres, named in the table below.
Florida is split across 23 area codes — 786, 904, 561, 813, 352, 321 and others. By allocated blocks 321 is the 10th largest of them, holding 5% of the Florida total.
Where 321 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why St Cloud and Kenansvl are shortened. Names are reproduced as recorded rather than expanded — the abbreviation is the key the block data is filed under.
| Rate centre | Blocks | Share of 321 |
|---|---|---|
| Cocoa | 1,405 | 30% |
| Melbourne | 757 | 16% |
| Orlando | 681 | 15% |
| Titusville | 327 | 7% |
| Eau Gallie | 302 | 7% |
| Winterpark | 275 | 6% |
| Cocoabeach | 233 | 5% |
| Sanford | 154 | 3% |
| Kissimmee | 143 | 3% |
| Oviedo | 55 | 1% |
| Apopka | 44 | 1% |
| Eastorange | 44 | 1% |
| St Cloud | 44 | 1% |
| Geneva | 33 | 1% |
| Wkissimmee | 31 | 1% |
| Celebratn | 22 | 0% |
| Kenansvl | 22 | 0% |
| Reedycreek | 22 | 0% |
| Montverde | 12 | 0% |
| Lkbunavist | 11 | 0% |
| Wintergrdn | 11 | 0% |
Carriers holding the most 321 blocks
Onvoy555 blocks
T-Mobile USA, Inc.483 blocks
AT&T Wireless467 blocks
Omnipoint Miami E License, Llc464 blocks
Bandwidth425 blocks
Metropcs Networks, Llc269 blocks
No carrier holds more than 12% of 321; the blocks are spread thin across many companies.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 321 number still reports the carrier it started with. Closing that gap needs a live query against the routing database. How line type is derived.
Check a single 321 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 321?
Area code 321 covers Cocoa, Florida. It is not the only code there: 407, 689 are overlays on the same rate centres, so a Cocoa, Florida number can start with any of them.
Is a 321 number a mobile or a landline?
It can be either, and the digits do not say which. North American mobile and landline numbers share the same ranges, so the answer comes from the carrier holding the block. In 321 the split runs 47% mobile, 41% landline and 13% VoIP, so mobile is the most likely single answer.
Which carriers hold 321 numbers?
The largest holders are Onvoy, T-Mobile USA, Inc., AT&T Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 321 numbers are there?
The code holds 4,639 allocated blocks in our copy of the numbering plan. A block is 1,000 or 10,000 consecutive numbers depending on how deeply it has been pooled, so 321 covers on the order of 4,639,000 possible numbers — most of which have never been issued to anyone.