Area codes · +1
Area code 323
Area code 323 covers Los Angeles. We hold 6,032 allocated blocks for it across 12 rate centres, split 47% mobile, 45% landline and 8% VoIP.
The other area codes laid over 323
Area code 323 does not have Los Angeles to itself. 2 other codes — 213, 738 — 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 323 number and a 213 number from the same street can report different line types. Filtering Los Angeles by area code needs all 3 of them.
323 is not confined to Los Angeles itself: its blocks sit across 12 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 323 and others. By allocated blocks 323 is the 11th largest of them, holding 3% of the California total.
Where 323 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 323 |
|---|---|---|
| Montebello | 970 | 16% |
| Los Angeles | 960 | 16% |
| Los Angeles | 610 | 10% |
| Los Angeles | 572 | 9% |
| Los Angeles | 510 | 8% |
| Los Angeles | 467 | 8% |
| Los Angeles | 456 | 8% |
| Los Angeles | 355 | 6% |
| Los Angeles | 296 | 5% |
| Los Angeles | 295 | 5% |
| Los Angeles | 272 | 5% |
| Los Angeles | 262 | 4% |
Carriers holding the most 323 blocks
T-Mobile USA, Inc.1,098 blocks
Bandwidth756 blocks
Pacific Bell687 blocks
Metropcs Networks, Llc687 blocks
Onvoy462 blocks
T-Mobile Usa, Inc.383 blocks
The largest holder, T-Mobile USA, Inc., has 18% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 323 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 323 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 323?
Area code 323 covers Los Angeles. It is not the only code there: 213, 738 are overlays on the same rate centres, so a Los Angeles number can start with any of them.
Is a 323 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 323 the split runs 47% mobile, 45% landline and 8% VoIP, so mobile is the most likely single answer.
Which carriers hold 323 numbers?
The largest holders are T-Mobile USA, Inc., Bandwidth, Pacific Bell. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 323 numbers are there?
The code holds 6,032 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 323 covers on the order of 6,032,000 possible numbers — most of which have never been issued to anyone.