Mobile carrier
AS12912 T-Mobile Polska S.A.ASN lookup: IP ranges, prefixes and network type
AS12912 is the autonomous system number (ASN) announced by T-Mobile Polska S.A.. It announces 203 prefixes, 1,089,024 IPv4 addresses in total. Every address inside those ranges is routed by this operator, which is what makes the number the shortest answer to who runs a given address.
AS12912 at a glance
| Organisation | T-Mobile Polska S.A. |
|---|---|
| Autonomous system | AS12912 |
| Network type | Mobile carrier |
| IPv4 prefixes | 184 |
| IPv6 prefixes | 19 |
| IPv4 addresses | 1,089,024Summed across every announced prefix. IPv6 is not counted; the numbers are meaningless at that scale. |
| In known VPN ranges | 0 of 184 prefixes |
| In known datacenter ranges | 0 of 184 prefixes |
The last two rows are a second opinion, counted against the X4BNet VPN and datacenter range lists rather than read off the operator name. A network with most of its prefixes in the VPN list is carrying anonymised traffic whatever it calls itself.
Sample prefixes
The largest ranges T-Mobile Polska S.A. announces, biggest first. These are a sample and not the full routing table: 203 prefixes do not fit on a page, and the ones worth showing are the ones most traffic comes from.
| Prefix | Family | Addresses |
|---|---|---|
| 37.30.0.0/15 | IPv4 | 131,072 |
| 46.204.0.0/15 | IPv4 | 131,072 |
| 178.180.0.0/15 | IPv4 | 131,072 |
| 188.146.0.0/15 | IPv4 | 131,072 |
| 178.182.0.0/16 | IPv4 | 65,536 |
| 62.29.128.0/17 | IPv4 | 32,768 |
| 178.183.128.0/17 | IPv4 | 32,768 |
| 212.203.128.0/17 | IPv4 | 32,768 |
| 94.42.0.0/18 | IPv4 | 16,384 |
| 157.25.64.0/18 | IPv4 | 16,384 |
| 157.25.192.0/18 | IPv4 | 16,384 |
| 178.183.64.0/18 | IPv4 | 16,384 |
Look up an address on AS12912
The field is prefilled with 37.30.0.1, the first address of the largest range above. Change it for one from your own logs and you get the network, the operator and the verdict for that specific address.
What AS12912 means for detection
Addresses on T-Mobile Polska S.A. are mobile: phones and tablets behind carrier NAT. Our engine classifies them residential, with one caveat worth knowing. Carrier NAT puts thousands of subscribers behind one address, so an IP-level block here reaches far more people than intended, and rate limits keyed on the address will punish an entire city. Geolocation is coarse for the same reason.
The verdict for a single address is never settled by the ASN alone. It is the starting point, and IP Detection adds range membership, behaviour and history on top of it before it answers.
Related networks
The same page as JSON
No key and no signup. This is the endpoint this page is rendered from, so anything you read here you can script against.
curl https://ipscanner.io/v1/asn/directory/AS12912
IPScanner. AS12912 T-Mobile Polska S.A., ASN directory. https://ipscanner.io/de/asn/as12912. Derived from MaxMind GeoLite2.