Area codes · +1
Area code 510
Area code 510 covers Oakland, California. We hold 5,924 allocated blocks for it across 13 rate centres, split 40% mobile, 50% landline and 10% VoIP.
The other area codes laid over 510
Area code 510 does not have Oakland, California to itself. 1 other code — 341 — serves 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.
3411,173 blocks, 13 rate centres, mostly VoIP
Each holds its own blocks and its own carrier mix, so a 510 number and a 341 number from the same street can report different line types. Filtering Oakland, California by area code needs all 2 of them.
510 is not confined to Oakland, California itself: its blocks sit across 13 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 510 and others. By allocated blocks 510 is the 14th largest of them, holding 3% of the California total.
Where 510 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Frnk Main and Frnk Olivr 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 510 |
|---|---|---|
| Oakland | 1,199 | 20% |
| Hayward | 957 | 16% |
| Frnk Main | 621 | 10% |
| Oakland | 560 | 9% |
| Oakland | 449 | 8% |
| Richmond | 413 | 7% |
| Oakland | 372 | 6% |
| Frnk Olivr | 345 | 6% |
| Oakland | 325 | 5% |
| Elsbr-Pinl | 248 | 4% |
| Frnk Grnlf | 215 | 4% |
| Hrcul-Rode | 134 | 2% |
| Crockett | 77 | 1% |
Carriers holding the most 510 blocks
Pacific Bell1,153 blocks
T-Mobile USA, Inc.640 blocks
Onvoy574 blocks
Verizon Wireless475 blocks
Bandwidth453 blocks
AT&T Wireless399 blocks
The largest holder, Pacific Bell, has 19% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 510 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 510 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 510?
Area code 510 covers Oakland, California. It is not the only code there: 341 is an overlay on the same rate centres, so a Oakland, California number can start with any of them.
Is a 510 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 510 the split runs 40% mobile, 50% landline and 10% VoIP, so landline is the most likely single answer.
Which carriers hold 510 numbers?
The largest holders are Pacific Bell, T-Mobile USA, Inc., Onvoy. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 510 numbers are there?
The code holds 5,924 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 510 covers on the order of 5,924,000 possible numbers — most of which have never been issued to anyone.