Area codes · +1
Area code 645
Area code 645 covers Miami, Florida. We hold 798 allocated blocks for it across 5 rate centres, split 50% mobile, 10% landline and 40% VoIP.
The other area codes laid over 645
Area code 645 does not have Miami to itself. 2 other codes — 305, 786 — 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 645 number and a 305 number from the same street can report different line types. Filtering Miami by area code needs all 3 of them.
645 is not confined to Miami itself: its blocks sit across 5 rate centres, named in the table below.
Florida is split across 23 area codes — 786, 904, 561, 813, 352, 645 and others. By allocated blocks 645 is the 21th largest of them, holding 1% of the Florida total.
Where 645 numbers are concentrated
Rate-centre names are reproduced as NANPA records them. The agency truncates them to ten characters, so longer names appear shortened elsewhere on this site.
| Rate centre | Blocks | Share of 645 |
|---|---|---|
| Miami | 388 | 49% |
| North Dade | 154 | 19% |
| Homestead | 95 | 12% |
| Perrine | 81 | 10% |
| Keys | 80 | 10% |
Carriers holding the most 645 blocks
AT&T Wireless250 blocks
Onvoy205 blocks
Eon Telecom, Inc.55 blocks
Wide Voice, Llc47 blocks
Verizon Wireless37 blocks
Bandwidth37 blocks
The largest holder, AT&T Wireless, has 31% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 645 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 645 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 645?
Area code 645 covers Miami, Florida. It is not the only code there: 305, 786 are overlays on the same rate centres, so a Miami, Florida number can start with any of them.
Is a 645 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 645 the split runs 50% mobile, 10% landline and 40% VoIP, so mobile is the most likely single answer.
Which carriers hold 645 numbers?
The largest holders are AT&T Wireless, Onvoy, Eon Telecom, Inc.. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 645 numbers are there?
The code holds 798 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 645 covers on the order of 798,000 possible numbers — most of which have never been issued to anyone.