Katowice · Poland
PeeringDB records no internet exchange under Katowice, Poland, and six colocation facilities holding 343 network presences. 4 Data Center is the busiest with 285 networks, followed by Quicktel with 28 and 3S Data Center Katowice with 12. An IP address that geolocates to Katowice reflects an operator's registry record, not the location of a device.
Internet exchanges in Katowice
An exchange is a shared switch where networks hand traffic to each other directly. Participant counts come from PeeringDB, where each network maintains its own record.
| Exchange | Participants | Registry carriers peering |
|---|---|---|
EPIX.Katowice | 390 | none in the registry |
Exchange records: PeeringDB.
Colocation facilities
Buildings where networks put equipment. The network count is how many PeeringDB members list a presence there, which shows where capacity in the city sits.
| Facility | Networks present | Address |
|---|---|---|
| 4 Data Center | 285 | Adamskiego 7 |
| Quicktel Sp. z o.o. | 28 | Adamskiego 7 |
| 3S Data Center Katowice | 12 | ul. Gospodarcza 12 |
| Orange Polska // Katowice | 7 | ul. Francuska 101 |
| ATMAN Data Center Katowice-1 (KTW-1, Altus) | 6 | Uniwersytecka 13 |
| PSE Jordana | 5 | Jordana 25 |
What a Katowice IP address tells you
Katowice's weight in PeeringDB sits in buildings rather than on a peering fabric. No exchange is filed under this entry, while six facilities hold 343 network presences between them. 4 Data Center accounts for 285 of those, more than eight times the next busiest room, Quicktel with 28. After that the numbers fall away, with 3S Data Center Katowice at 12, Orange Polska's Katowice site at 7, ATMAN Katowice-1 in the Altus building at 6 and PSE Jordana at 5. Poland's mobile carriers have no exchange participation recorded here, because this entry has no exchange to join.
An address that geolocates to Katowice may belong to a device anywhere on a Polish network. Orange Polska announces its mobile range from AS5617, Play from AS39603 and AS201019, T-Mobile Polska from AS12912, and each block carries one registered location no matter how wide the coverage. Mobile sessions leave through a limited set of gateways, so the visible exit point rarely matches the cell a handset is using. Geolocation providers copy the location the operator published, which is how an entire range comes to carry one city name.
The useful checks on a Katowice address are the origin ASN and the netname on the prefix. An origin of AS5617, AS12912, AS39603 or AS201019 marks mobile access, and an origin belonging to a network colocated at 4 Data Center or 3S Data Center Katowice marks hosting. With 343 network presences in six buildings and no exchange, much of what a lookup calls Katowice is server address space rather than subscriber address space, and the registry entry on the prefix is what separates them.
Mobile carriers in Poland
A mobile address in Katowice 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
Is there an internet exchange in Katowice?
PeeringDB records none under the Katowice entry. What the registry holds for the city is colocation, six facilities with 343 network presences. A separate entry, Katowice/Silesia, carries the EPIX.Katowice exchange and its 390 participants.
Which Katowice data centres hold the most networks?
4 Data Center is far ahead at 285 networks. Quicktel follows with 28 and 3S Data Center Katowice with 12, then Orange Polska's Katowice site with 7, ATMAN Katowice-1 with 6 and PSE Jordana with 5, for 343 network presences in total.
Does an IP that geolocates to Katowice mean the device is there?
No. A geolocation database records where an operator says an address block belongs, which for a national range is normally one office address. Mobile prefixes cover a carrier's whole footprint, so a Katowice label can sit on a session anywhere in Poland.
Sources
- PeeringDB - exchanges, participant counts, facilities and network presence, snapshot 2026-09-07
- PROXIES.SX carrier and ASN registry - operator ASNs used to match peering participants