Area codes · +1
Area code 341
Area code 341 covers Oakland, California. We hold 1,173 allocated blocks for it across 13 rate centres, split 41% mobile, 4% landline and 55% VoIP.
The other area codes laid over 341
Area code 341 does not have Oakland, California to itself. 1 other code — 510 — 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.
5105,924 blocks, 13 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 341 number and a 510 number from the same street can report different line types. Filtering Oakland, California by area code needs all 2 of them.
341 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, 341 and others. By allocated blocks 341 is the 35th largest of them, holding 1% of the California total.
Where 341 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Frnk Main and Frnk Grnlf 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 341 |
|---|---|---|
| Frnk Main | 168 | 14% |
| Hayward | 132 | 11% |
| Oakland | 120 | 10% |
| Richmond | 110 | 9% |
| Oakland | 106 | 9% |
| Elsbr-Pinl | 94 | 8% |
| Oakland | 88 | 8% |
| Frnk Grnlf | 85 | 7% |
| Frnk Olivr | 83 | 7% |
| Oakland | 70 | 6% |
| Oakland | 63 | 5% |
| Hrcul-Rode | 32 | 3% |
| Crockett | 22 | 2% |
Carriers holding the most 341 blocks
Onvoy371 blocks
AT&T Wireless156 blocks
T-Mobile Usa, Inc.139 blocks
Verizon Wireless101 blocks
Bandwidth93 blocks
Fractel, Llc84 blocks
The largest holder, Onvoy, has 32% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 341 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 341 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 341?
Area code 341 covers Oakland, California. It is not the only code there: 510 is an overlay on the same rate centres, so a Oakland, California number can start with any of them.
Is a 341 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 341 the split runs 41% mobile, 4% landline and 55% VoIP, so VoIP is the most likely single answer.
Which carriers hold 341 numbers?
The largest holders are Onvoy, AT&T Wireless, T-Mobile Usa, Inc.. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 341 numbers are there?
The code holds 1,173 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 341 covers on the order of 1,173,000 possible numbers — most of which have never been issued to anyone.