Maryland · network infrastructure

Maryland's counted capacity spreads over eight cities rather than sitting in one. Databridge Sites Silver Spring lists 12 networks, the highest single count in the state, and Baltimore follows close behind, where Zayo Baltimore at 111 Market Place and Crown Castle Baltimore record eight networks each and TierPoint Baltimore records seven. AiNET runs entries in Baltimore, Beltsville, Laurel and Glen Burnie, and Atlantech Online has sites in Rockville and Silver Spring. Local peering is thin. Baltimore IX records three participants, matching the three peers counted for Maryland, so networks here mostly peer outside the state.

A Maryland IP address reports a registration. Geolocation entries come from the address an operator publishes for the block, so a range registered in Baltimore can carry traffic from equipment in Rockville, Laurel or well outside Maryland. Mobile pools stretch the distance further. AT&T, T-Mobile and Verizon route subscriber traffic through regional gateways on mobile ASNs such as 20057, 21928 and 6167, and a phone in Silver Spring can present an address that a database places somewhere else.

The origin ASN and the netname on the prefix answer what a state label cannot. A route from a carrier mobile ASN belongs to a subscriber pool whose city follows the carrier's registration, while a route from a network with a Baltimore or Silver Spring facility presence has a record you can read directly. Maryland's three recorded peers show how little of its traffic meets inside the state, so a Maryland address does not imply a Maryland path.