Quick answer
Where are US ISP proxies physically hosted?
In data centers, mostly in carrier hotels where many networks connect, such as the Equinix campus in Ashburn (523 networks in PeeringDB), the NAP of the Americas in Miami (336), One Wilshire in Los Angeles and 350 East Cermak in Chicago (335 each), checked October 19, 2026. PinnedIP rents US ISP IPs from $2.03 for 30 days.
What is a carrier hotel?
A carrier hotel is a building where many networks rent space and connect to each other, usually in a "meet-me room". Providers, clouds and content networks exchange traffic there directly or through an internet exchange (IX), a shared switch that lets dozens or hundreds of networks connect at once. Many carrier hotels started as telephone, freight or office buildings close to old fiber routes, which is why they sit in downtowns: 60 Hudson Street in New York, One Wilshire in Los Angeles, 56 Marietta Street in Atlanta.
Why would an ISP proxy sit in one?
Because the server needs fast, reliable links and the consumer provider’s address must be routed to it. A provider can lease address space for a hosted service and route it to a server in a building where it is present; carrier hotels are where the most providers are present. The result is an IP registered to a consumer provider, with data-center speed and uptime. That is the honest description of an ISP proxy, and it is why its city is not a home address: see why ISP IP cities differ.
The largest buildings and exchanges in our 20 metros
| Metro | Building | Networks there | Largest exchange | Networks on it |
|---|---|---|---|---|
| Ashburn, VA | Equinix Ashburn campus | 523 | Equinix Ashburn | 345 |
| Miami, FL | NAP of the Americas | 336 | FL-IX | 196 |
| Los Angeles, CA | One Wilshire | 335 | Any2West (also Silicon Valley) | 264 |
| Chicago, IL | 350 E Cermak Rd | 335 | Equinix Chicago | 254 |
| San Jose, CA | Equinix SV1, Great Oaks Blvd | 283 | Any2West | 264 |
| Seattle, WA | Westin Building Exchange | 233 | SIX Seattle | 370 |
| Atlanta, GA | 56 Marietta Street | 191 | Digital Realty Atlanta | 146 |
| Dallas, TX | Infomart (Equinix DA1) | 168 | Equinix Dallas | 209 |
| New York, NY | 60 Hudson Street | 162 | DE-CIX New York | 263 |
| Denver, CO | 910 15th St (CoreSite DE1) | 154 | IX-Denver | 91 |
| Kansas City, MO | 1102 Grand Blvd | 84 | KCIX | 199 |
| Minneapolis, MN | 511 Building | 82 | MICE | 147 |
PeeringDB counts are self-reported networks. The other 8 metros are on their city pages.
Does the building decide the city an IP shows?
Not directly. Websites do not see the building; they see the IP, its registered owner and what geolocation databases say about it. A database may place the IP in the registry’s city, in the building’s city or in the metro’s main city. Charlotte and Las Vegas, where the local exchanges are small, show the effect: addresses geolocated there can be hosted in Atlanta, Ashburn or Los Angeles.
Hosting: FAQ
Is a carrier-hotel IP a residential IP?
No. The IP is registered to a consumer provider, but the server is in a data center. That is the definition of an ISP proxy.
Which building is my PinnedIP IP in?
We do not publish the building of each IP; the checkout shows the provider and, when known, the state and city of the address. Static ISP IPs come from upstream partners that lease address space registered to US internet providers and host it on servers in US data centers. No home device or end-user connection is involved.
Why is Ashburn so large?
Northern Virginia has the largest cluster of data centers in the United States and every large network is present there; the Equinix Ashburn campus alone lists 523 networks in PeeringDB (October 19, 2026).
Sources (5)
- PeeringDB: Equinix Ashburn campus — PeeringDB (2026-10-19)
- PeeringDB: NAP of the Americas — PeeringDB (2026-10-19)
- PeeringDB: One Wilshire — PeeringDB (2026-10-19)
- PeeringDB: 350 E Cermak — PeeringDB (2026-10-19)
- PeeringDB: SIX Seattle — PeeringDB (2026-10-19)