Wisconsin · network infrastructure
The snapshot records 17 facilities in Wisconsin across eight cities, holding 53 network presences. Madison has the most capacity, where Network 222 lists 13 networks. Two exchanges run in the state, MadIX in Madison with 17 participants and MKE-IX in Milwaukee with nine.
Internet exchanges in Wisconsin
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 |
|---|---|---|
| MadIX | Madison | 17 |
| MKE-IX | Milwaukee | 9 |
Colocation facilities
Buildings where networks put equipment. The network count is how many PeeringDB members list a presence there.
| Facility | City | Networks present |
|---|---|---|
| Network 222 | Madison | 13 |
| 324 E Wisconsin | Milwaukee | 7 |
| 5Nines Data | Madison | 6 |
| University of Wisconsin-Madison | Madison | 5 |
| TSR Solutions Data Center | Milwaukee | 5 |
| EdgeConneX Madison (EDCMAD01) | Madison | 4 |
| US Signal WI02 - Madison | Fitchburg | 3 |
| SupraNet Communications Madison | Madison | 2 |
| 612 W Main | Madison | 2 |
| Data Holdings Milwaukee | Milwaukee | 2 |
| TierPoint Milwaukee | Milwaukee | 1 |
| Ethoplex Data Center | Germantown | 1 |
| Ethoplex Edge DC - Green Bay | De Pere | 1 |
| ark data centers - Green Bay, WI | Menasha | 1 |
| Vaultas | Milwaukee | 0 |
Showing the 15 facilities with the most networks, of 17 recorded.
What a Wisconsin IP address tells you
Madison holds more of Wisconsin's counted capacity than Milwaukee does. Network 222 lists 13 networks, 5Nines Data six, the University of Wisconsin-Madison five and EdgeConneX Madison four. Milwaukee's sites are smaller, with 324 E Wisconsin at seven networks and TSR Solutions Data Center at five. Single entries appear in Fitchburg, Germantown, De Pere and Menasha. Both cities give traffic a local meeting point. MadIX records 17 participants and MKE-IX records nine, and against 26 peers for the state that puts a fair share of Wisconsin peering inside Wisconsin.
A Wisconsin IP address reflects the record an operator publishes for the block, not the position of the machine using it. A range registered to a Milwaukee address can serve customers in Green Bay or well outside Wisconsin. Mobile traffic stretches that further. AT&T, T-Mobile and Verizon route subscribers through regional gateways on mobile ASNs such as 20057, 21928 and 6167, so a phone in Madison can present an address that databases place in another state.
The origin ASN and the netname on the prefix carry more detail than a state label. When a prefix originates from one of the carrier mobile ASNs listed here, the address belongs to a carrier pool and its city entry follows the carrier's registration. Wisconsin's 53 network presences sit in 17 facilities across eight cities, and a state-level lookup cannot say which of those a prefix routes through.
Mobile carriers in the United States
A mobile address anywhere in Wisconsin 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 Wisconsin?
Seventeen facilities appear in the Wisconsin snapshot, holding 53 network presences across eight cities. Madison accounts for the densest sites, with Network 222 at 13 networks and 5Nines Data at six, and Milwaukee follows with 324 E Wisconsin at seven networks.
Is there an internet exchange in Wisconsin?
Two. MadIX in Madison has 17 participants and MKE-IX in Milwaukee has nine. Against the 26 peers recorded for Wisconsin, a good part of the state's peering happens inside it rather than at exchanges in other states.
Can I get an IP address in Wisconsin?
An address geolocates to Wisconsin when the operator registers the block to a Wisconsin address, so placement follows that registration and not a customer request. Mobile ranges are the least predictable, because carriers register large pools centrally and a handset can appear 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