California · network infrastructure
The snapshot records 148 facilities in California holding 2,183 network presences across 33 cities, with 1,074 networks peering in the state. Los Angeles holds the most capacity, and CoreSite One Wilshire there has 334 networks. California has exchanges of its own, the busiest Equinix San Jose with 185 participants.
Internet exchanges in California
Exchanges are attributed to the state through the city they sit in, because PeeringDB records a state for facilities but not for exchanges.
| Exchange | City | Participants |
|---|---|---|
| Equinix San Jose | San Jose | 185 |
| EVIX | Fremont | 170 |
| FCIX | Fremont | 142 |
| FREMIX | Fremont | 109 |
| SFMIX | San Francisco | 93 |
| Equinix Los Angeles | Los Angeles | 83 |
| Equinix Palo Alto | Palo Alto | 69 |
| BGP.Exchange - Fremont | Fremont | 59 |
| BGP.Exchange - Los Angeles | Los Angeles | 42 |
| MegaIX Los Angeles | Los Angeles | 23 |
Showing the 10 exchanges with the most participants, of 20 recorded.
Colocation facilities
Buildings where networks put equipment. The network count is how many PeeringDB members list a presence there.
| Facility | City | Networks present |
|---|---|---|
| CoreSite - Los Angeles (LA1) One Wilshire | Los Angeles | 334 |
| Hurricane Electric Fremont 2 | Fremont | 302 |
| Equinix SV1/SV5/SV10 - Silicon Valley, San Jose | San Jose | 282 |
| CoreSite - Los Angeles (LA2) | Los Angeles | 199 |
| Equinix LA1 - Los Angeles | Los Angeles | 137 |
| Equinix SV8 - Silicon Valley, Palo Alto | Palo Alto | 66 |
| Equinix LA3/LA4 - Los Angeles, El Segundo | El Segundo | 57 |
| CoreSite - San Jose (SV1) | San Jose | 55 |
| Digital Realty LAX (600 W 7th) | Los Angeles | 50 |
| Digital Realty SFO (200 Paul) | San Francisco | 44 |
| Hurricane Electric Fremont 1 | Fremont | 41 |
| Digital Realty SFO (365 Main) | San Francisco | 35 |
| OpenColo | Santa Clara | 25 |
| Equinix SV2 - Silicon Valley, Santa Clara | Santa Clara | 24 |
| Equinix SV3 - Silicon Valley, San Jose | San Jose | 22 |
Showing the 15 facilities with the most networks, of 148 recorded.
What a California IP address tells you
Capacity in California sits in two corridors. Los Angeles carries CoreSite One Wilshire with 334 networks and CoreSite LA2 with 199, while the Bay Area holds Hurricane Electric Fremont 2 at 302 and the Equinix SV1/SV5/SV10 campus in San Jose at 282. Across 148 facilities the snapshot counts 2,183 network presences in 33 cities. Traffic meets inside the state at exchanges in the same towns. Equinix San Jose has 185 participants, EVIX and FCIX in Fremont have 170 and 142, and SFMIX in San Francisco has 93.
A California address block is registered to California because its operator filed it that way. Geolocation vendors read the record the operator publishes, so the state on an IP address reflects paperwork rather than the position of a machine. Mobile networks widen that gap. AT&T, T-Mobile and Verizon carry subscribers through regional gateways, and their mobile ASNs, among them 20057, 21928 and 6167, announce prefixes covering ground far wider than one state. A device on a California cell site can present an address registered elsewhere.
The origin ASN on a specific prefix says more than the state name attached to it. A route starting at 16572 or 32997 is mobile, and its apparent geography belongs to the carrier's gateway. A prefix announced by one of the 334 networks inside CoreSite One Wilshire, or one of the 282 in the San Jose campus, comes from an operator with a street address in the building. The netname on that record names the operator, and both fields sit in the same public registry as the counts here.
Cities in California with their own page
Mobile carriers in the United States
A mobile address anywhere in California is routed by one of the country's operators. Each entry lists the operator's ASNs so you can check which network an address belongs to.
Questions
How many data centres are in California?
The snapshot lists 148 facilities across 33 cities, holding 2,183 network presences between them. This page names only the fifteen with the most networks. CoreSite One Wilshire in Los Angeles is the busiest at 334, ahead of Hurricane Electric Fremont 2 at 302 and the Equinix San Jose campus at 282.
Is there an internet exchange in California?
Yes, more than one. Equinix San Jose records 185 participants, EVIX in Fremont 170, FCIX 142 and FREMIX 109, while SFMIX in San Francisco has 93 and Equinix Los Angeles has 83. Networks in the state can exchange traffic without carrying it outside California.
Can I get an IP address in California?
Placement follows the operator's address registration, not a customer's choice of state. A block reads as California when the network holding it filed a California address on the record. On mobile networks that filing points at the carrier's gateway, so one registration can cover subscribers across a wide area.
Sources
- PeeringDB - facilities, network presence and exchange participants, snapshot 2026-09-07
- PROXIES.SX carrier and ASN registry - the operators routing mobile addresses in this country