Area codes · +1
Area code 279
Area code 279 covers Sacramento. We hold 1,570 allocated blocks for it across 16 rate centres, split 50% mobile, 5% landline and 45% VoIP.
The other area codes laid over 279
Area code 279 does not have Sacramento to itself. 1 other code — 916 — 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.
9165,680 blocks, 17 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 279 number and a 916 number from the same street can report different line types. Filtering Sacramento by area code needs all 2 of them.
279 is not confined to Sacramento itself: its blocks sit across 16 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 279 and others. By allocated blocks 279 is the 33th largest of them, holding 1% of the California total.
Where 279 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Rsvl Main and Rsvl Ctht 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 279 |
|---|---|---|
| Sacramento | 475 | 30% |
| Sacramento | 267 | 17% |
| Folsom | 176 | 11% |
| Elk Grove | 131 | 8% |
| Rsvl Main | 118 | 8% |
| Fair Oaks | 71 | 5% |
| So Placer | 69 | 4% |
| Rsvl Ctht | 53 | 3% |
| Lincoln | 47 | 3% |
| Rio Linda | 44 | 3% |
| Michignbar | 31 | 2% |
| Meadowview | 29 | 2% |
| Courtland | 22 | 1% |
| Walnut Grv | 17 | 1% |
| Pleasatgrv | 11 | 1% |
| Isleton | 9 | 1% |
Carriers holding the most 279 blocks
Onvoy376 blocks
T-Mobile Usa, Inc.238 blocks
Verizon Wireless217 blocks
AT&T Wireless199 blocks
Bandwidth110 blocks
Fractel, Llc80 blocks
The largest holder, Onvoy, has 24% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 279 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 279 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 279?
Area code 279 covers Sacramento. It is not the only code there: 916 is an overlay on the same rate centres, so a Sacramento number can start with any of them.
Is a 279 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 279 the split runs 50% mobile, 5% landline and 45% VoIP, so mobile is the most likely single answer.
Which carriers hold 279 numbers?
The largest holders are Onvoy, T-Mobile Usa, Inc., Verizon Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 279 numbers are there?
The code holds 1,570 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 279 covers on the order of 1,570,000 possible numbers — most of which have never been issued to anyone.