Washington · network infrastructure

Seattle holds the bulk of Washington's recorded capacity. Digital Realty Seattle SEA10 lists 232 networks and Equinix SE2/SE3 lists 113, with KOMO Plaza Seattle at 23. Outside the city, Tukwila carries WowRack at 20 networks and Sabey Intergate East Building 4 at 13, while Spokane has the US Bank Building at 18 and Neutron at 11. Traffic can meet locally rather than leaving the state. SIX Seattle records 368 participants, and SpokaneIX gives the eastern side of the state its own exchange with 12.

A Washington IP address is a claim in a published record, not a measurement. Address blocks carry the location the operator registered for them, and geolocation databases read that registration. Mobile networks make this looser still. AT&T, T-Mobile and Verizon route subscriber traffic through regional gateways, so a phone in Spokane can present an address that databases place in Seattle or outside Washington entirely. The 598 network presences counted here belong to facilities, not to any address block a device might hold.

Checking the prefix tells you more than a city label does. Look up the origin ASN announcing the specific address, then read the netname on that block. Verizon registers seven mobile ASNs, AT&T five and T-Mobile five, so the origin alone narrows a mobile address to a carrier rather than a city. Washington's 515 peering networks and 48 facilities describe where infrastructure sits, which is a separate question from where any given subscriber connects.