Area codes · +1
Area code 909
Area code 909 is centred on Ontario, California. We hold 6,368 allocated blocks for it across 25 rate centres, split 56% mobile, 35% landline and 9% VoIP.
The other area codes laid over 909
Area code 909 does not have Ontario to itself. 1 other code — 840 — 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.
8401,319 blocks, 19 rate centres, mostly mobile
Each holds its own blocks and its own carrier mix, so a 909 number and a 840 number from the same street can report different line types. Filtering Ontario by area code needs all 2 of them.
909 is not confined to Ontario itself: its blocks sit across 25 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 909 and others. By allocated blocks 909 is the 7th largest of them, holding 4% of the California total.
Where 909 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why S Berndino and Bigbear Lk 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 909 |
|---|---|---|
| Ontario | 824 | 13% |
| S Berndino | 748 | 12% |
| Fontana | 650 | 10% |
| Upland | 559 | 9% |
| Chino | 495 | 8% |
| Pomona | 418 | 7% |
| Claremont | 369 | 6% |
| Redlands | 346 | 5% |
| Colton | 333 | 5% |
| Rialto | 297 | 5% |
| Diamondbar | 218 | 3% |
| Arrowhead | 199 | 3% |
| Marshall | 160 | 3% |
| Highland | 129 | 2% |
| Mentone | 122 | 2% |
| Calimesa | 113 | 2% |
| Etiwanda | 100 | 2% |
| Bigbear Lk | 72 | 1% |
| Bigbear Cy | 66 | 1% |
| Crestline | 63 | 1% |
| Runningspg | 51 | 1% |
| Riverside | 7 | 0% |
| Corona | 2 | 0% |
| Hemt Hemt | 2 | 0% |
1 further rate centre in 909 hold fewer blocks than these.
Carriers holding the most 909 blocks
T-Mobile USA, Inc.824 blocks
Verizon Wireless744 blocks
AT&T Wireless646 blocks
Onvoy531 blocks
Bandwidth497 blocks
T-Mobile Usa, Inc.471 blocks
The largest holder, T-Mobile USA, Inc., has 13% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 909 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 909 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 909?
Area code 909 covers Ontario, California. It is not the only code there: 840 is an overlay on the same rate centres, so a Ontario, California number can start with any of them.
Is a 909 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 909 the split runs 56% mobile, 35% landline and 9% VoIP, so mobile is the most likely single answer.
Which carriers hold 909 numbers?
The largest holders are T-Mobile USA, Inc., Verizon Wireless, AT&T Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 909 numbers are there?
The code holds 6,368 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 909 covers on the order of 6,368,000 possible numbers — most of which have never been issued to anyone.