Area codes · +1
Area code 650
Area code 650 covers Palo Alto, California. We hold 5,838 allocated blocks for it across 15 rate centres, split 29% mobile, 59% landline and 12% VoIP.
How far area code 650 reaches
Area code 650 covers 15 rate centres, so two 650 numbers are not always a local call to each other.
A rate centre is a billing boundary rather than a postal one, which is why an area code can span several and a single city can contain many. It is also why the code alone cannot place a subscriber beyond a rough region.
California is split across 40 area codes — 657, 707, 559, 209, 530, 650 and others. By allocated blocks 650 is the 15th largest of them, holding 3% of the California total.
Where 650 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Mt View and Redwood Cy 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 650 |
|---|---|---|
| Palo Alto | 1,152 | 20% |
| San Mateo | 915 | 16% |
| Mt View | 841 | 14% |
| Ssnfrncsco | 657 | 11% |
| Redwood Cy | 478 | 8% |
| Sncrl-Blmt | 351 | 6% |
| Los Altos | 255 | 4% |
| Millbrae | 230 | 4% |
| Halfmoonby | 202 | 3% |
| Pacifica | 160 | 3% |
| San Francisco | 154 | 3% |
| Woodside | 142 | 2% |
| Pescadero | 111 | 2% |
| La Honda | 92 | 2% |
| Moss Beach | 73 | 1% |
Carriers holding the most 650 blocks
Pacific Bell1,205 blocks
Onvoy802 blocks
AT&T Wireless468 blocks
Bandwidth436 blocks
Verizon Wireless351 blocks
T-Mobile Usa, Inc.315 blocks
The largest holder, Pacific Bell, has 21% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 650 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 650 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 650?
Area code 650 covers Palo Alto, California, spanning 15 rate centres.
Is a 650 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 650 the split runs 29% mobile, 59% landline and 12% VoIP, so landline is the most likely single answer.
Which carriers hold 650 numbers?
The largest holders are Pacific Bell, Onvoy, 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 650 numbers are there?
The code holds 5,838 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 650 covers on the order of 5,838,000 possible numbers — most of which have never been issued to anyone.