Illinois · network infrastructure
The snapshot records 71 facilities in Illinois holding 823 network presences across 19 cities, with 475 networks peering in the state. Chicago holds nearly all of it, and the Equinix CH1/CH2/CH4 campus has 334 networks. Illinois has exchanges in the same buildings, the busiest Equinix Chicago with 254 participants.
Internet exchanges in Illinois
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 Chicago | Chicago | 254 |
| DE-CIX Chicago | Chicago | 83 |
| ChIX | Chicago | 64 |
| Any2Chicago | Chicago | 16 |
| BGP.Exchange - Chicago | Chicago | 16 |
| MegaIX Chicago | Chicago | 12 |
| Chicago Open Pipes | Chicago | 8 |
| Digital Realty Chicago | Chicago | 7 |
| DACS-IX Central | Chicago | 7 |
| FD-IX - Chicago | Chicago | 4 |
Showing the 10 exchanges with the most participants, of 13 recorded.
Colocation facilities
Buildings where networks put equipment. The network count is how many PeeringDB members list a presence there.
| Facility | City | Networks present |
|---|---|---|
| Equinix CH1/CH2/CH4 - Chicago | Chicago | 334 |
| Digital Realty CHI (350 E Cermak) | Chicago | 100 |
| CoreSite - Chicago (CH1) | Chicago | 74 |
| Equinix CH3 - Elk Grove | Elk Grove Village | 44 |
| Netrality Chicago - 717 S Wells | Chicago | 22 |
| Northwestern University co-location facility | Chicago | 20 |
| 365 Data Centers Chicago (CH6) | Chicago | 19 |
| Digital Realty CH1 - Chicago | Elk Grove Village | 18 |
| SBA Edge, LLC | Chicago | 16 |
| Level(3) Chicago (Kingsbury) | Chicago | 15 |
| CoreSite - Chicago (CH2) | Chicago | 15 |
| QTS Chicago (CHI1) | Chicago | 14 |
| TierPoint Chicago - Polk | Chicago | 9 |
| CyrusOne Aurora I | Aurora | 9 |
| Centersquare Chicago (ORD2) | Elk Grove Village | 8 |
Showing the 15 facilities with the most networks, of 71 recorded.
What a Illinois IP address tells you
Chicago holds the state's interconnection. The Equinix CH1/CH2/CH4 campus has 334 networks and Digital Realty at 350 East Cermak Road has 100, with CoreSite CH1 on 74. Equinix CH3 in Elk Grove Village has 44, and the remaining named sites in the city run from 22 downward. Networks peer where they already sit. Equinix Chicago records 254 participants, DE-CIX Chicago 83 and ChIX 64, and every exchange the snapshot names for Illinois is in Chicago.
An Illinois address block reads as Illinois because its operator registered it that way, and geolocation vendors repeat that registration. Nothing in the address describes the room the machine is in. Mobile networks add distance to the same problem, because AT&T, T-Mobile and Verizon route subscriber sessions through regional gateways. A handset connected in Aurora can leave the network in Chicago, or in another state, and the address it presents follows the gateway rather than the tower it is attached to.
Check the origin ASN and the netname on the prefix. Mobile prefixes announced by ASNs such as 13644, 27522 or 12079 carry handset traffic, and their registered locations reflect carrier gateways. A prefix announced by one of the 334 networks in the Equinix Chicago campus has a registered street address that matches the building. Those two fields come from the same registry that supplied the facility and exchange counts here.
Cities in Illinois with their own page
Mobile carriers in the United States
A mobile address anywhere in Illinois 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 Illinois?
The snapshot lists 71 facilities across 19 cities, holding 823 network presences. Chicago has most of them, including the Equinix CH1/CH2/CH4 campus with 334 networks and Digital Realty at 350 East Cermak Road with 100. Elk Grove Village and Aurora hold the other named sites.
Is there an internet exchange in Illinois?
Yes, and every one named here is in Chicago. Equinix Chicago has 254 participants, DE-CIX Chicago 83 and ChIX 64. Smaller exchanges such as Any2Chicago, MegaIX Chicago and Chicago Open Pipes run in the same buildings, so networks can peer without carrying traffic out of the city.
Can I get an IP address in Illinois?
Placement follows the operator's address registration, not a customer's choice of state. A block reads as Illinois when its holder registered an Illinois address against it. Mobile blocks usually register to the carrier's gateway, so an Illinois result can cover subscribers well outside the state.
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