By network density

4,181 facilities classified by peering-network density. 1,170 additional facilities have no PeeringDB-registered networks and are not classified here.

Network count is the single most useful signal for what a colocation facility is for. Carrier hotels and interconnect hubs concentrate the most networks; enterprise and hyperscale-leaning buildings concentrate the fewest. PeeringDB only knows about networks that publish their peering footprint, so this view skews toward the interconnect tier of the market.

• Ultra-dense

  50+ networks231

  Interconnect hubs. These facilities host 50 or more peering networks — the kind of buildings carrier-neutral colo customers buy specifically to reach everyone in a single cross-connect.

• Dense

  10–49 networks868

  Regional peering points. Strong network presence but not at carrier-hotel scale. The middle of the colo market — useful for regional content and ISP peering.

• Standard

  1–9 networks3,082

  Facilities with light network presence. Typically wholesale, enterprise-anchored, or hyperscale-leaning buildings where most traffic is internal rather than peered.