Area codes · +1

Area code 305

Area code 305 covers Miami, Florida. We hold 4,122 allocated blocks for it across 6 rate centres, split 38% mobile, 54% landline and 7% VoIP.

The other area codes laid over 305

Area code 305 does not have Miami to itself. 2 other codes — 645, 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 305 number and a 645 number from the same street can report different line types. Filtering Miami by area code needs all 3 of them.

305 is not confined to Miami itself: its blocks sit across 6 rate centres, named in the table below.

Florida is split across 23 area codes — 786, 904, 561, 813, 352, 305 and others. By allocated blocks 305 is the 13th largest of them, holding 5% of the Florida total.

Where 305 numbers are concentrated

NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Xxxxxxxxxx is shortened. Names are reproduced as recorded rather than expanded — the abbreviation is the key the block data is filed under.

Carriers holding the most 305 blocks

The largest holder, Bellsouth Telecomm Inc Dba Southern Bell Tel & Tel, has 20% of the code.

These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 305 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 305 number, or run a whole list through the free cleaner — neither uploads anything.

Common questions