Area codes · +1
Area code 738
Area code 738 covers Los Angeles. We hold 217 allocated blocks for it across 15 rate centres, split 7% mobile, 13% landline and 81% VoIP.
The other area codes laid over 738
Area code 738 does not have Los Angeles to itself. 2 other codes — 213, 323 — 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 738 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.
738 is not confined to Los Angeles itself: its blocks sit across 15 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 738 and others. By allocated blocks 738 is the 39th largest of them, holding 0% of the California total.
Where 738 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 738 |
|---|---|---|
| Los Angeles | 37 | 17% |
| Los Angeles | 24 | 11% |
| Montebello | 22 | 10% |
| Los Angeles | 20 | 9% |
| Los Angeles | 14 | 6% |
| Los Angeles | 14 | 6% |
| Los Angeles | 14 | 6% |
| Los Angeles | 11 | 5% |
| Los Angeles | 11 | 5% |
| Los Angeles | 11 | 5% |
| Los Angeles | 10 | 5% |
| Los Angeles | 8 | 4% |
| Los Angeles | 8 | 4% |
| Los Angeles | 7 | 3% |
| Los Angeles | 6 | 3% |
Carriers holding the most 738 blocks
Onvoy145 blocks
Wide Voice, Llc26 blocks
Bandwidth17 blocks
Verizon Wireless9 blocks
Exiant Communications Llc8 blocks
T-Mobile Usa, Inc.5 blocks
Onvoy alone holds 67% of every block in 738, which is unusually concentrated for an area code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 738 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 738 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 738?
Area code 738 covers Los Angeles. It is not the only code there: 213, 323 are overlays on the same rate centres, so a Los Angeles number can start with any of them.
Is a 738 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 738 the split runs 7% mobile, 13% landline and 81% VoIP, so VoIP is the most likely single answer.
Which carriers hold 738 numbers?
The largest holders are Onvoy, Wide Voice, Llc, Bandwidth. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 738 numbers are there?
The code holds 217 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 738 covers on the order of 217,000 possible numbers — most of which have never been issued to anyone.