Area codes · +1
Area code 415
Area code 415 covers San Francisco. We hold 5,720 allocated blocks for it across 14 rate centres, split 30% mobile, 59% landline and 11% VoIP.
The other area codes laid over 415
Area code 415 does not have San Francisco to itself. 1 other code — 628 — 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.
6282,074 blocks, 14 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 415 number and a 628 number from the same street can report different line types. Filtering San Francisco by area code needs all 2 of them.
415 is not confined to San Francisco itself: its blocks sit across 14 rate centres, named in the table below.
California is split across 40 area codes — 657, 707, 559, 209, 530, 415 and others. By allocated blocks 415 is the 18th largest of them, holding 3% of the California total.
Where 415 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Stnsn-Blns is 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 415 |
|---|---|---|
| San Francisco | 3,176 | 56% |
| San Francisco | 490 | 9% |
| San Francisco | 461 | 8% |
| San Rafael | 452 | 8% |
| Sausalito | 178 | 3% |
| Novato | 162 | 3% |
| Belvedere | 155 | 3% |
| Millvalley | 126 | 2% |
| Cortemadra | 113 | 2% |
| Ignacio | 113 | 2% |
| Stnsn-Blns | 88 | 2% |
| Pointreyes | 77 | 1% |
| Nicasio | 66 | 1% |
| Inverness | 55 | 1% |
Carriers holding the most 415 blocks
Pacific Bell1,556 blocks
Bandwidth550 blocks
Onvoy485 blocks
Verizon Wireless415 blocks
T-Mobile USA, Inc.408 blocks
AT&T Wireless352 blocks
The largest holder, Pacific Bell, has 27% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 415 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 415 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 415?
Area code 415 covers San Francisco. It is not the only code there: 628 is an overlay on the same rate centres, so a San Francisco number can start with any of them.
Is a 415 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 415 the split runs 30% mobile, 59% landline and 11% VoIP, so landline is the most likely single answer.
Which carriers hold 415 numbers?
The largest holders are Pacific Bell, Bandwidth, Onvoy. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 415 numbers are there?
The code holds 5,720 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 415 covers on the order of 5,720,000 possible numbers — most of which have never been issued to anyone.