🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS12912, with the network's IPv6 and DNSSEC adoption and its observed prefixes. An autonomous system is the routing identity of a hosting company or ISP. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.

📈 Domains over time#

111 days
011222026-07-012026-08-252026-10-19
1 latest0 over 111 days

Active .dk domains whose website address (A record) is announced by AS12912, counted once a day.

🌐 AS12912 at a glance#

T-Mobile Polska S.A.

AS12912 is announced by T-Mobile Polska S.A. (Poland) and currently hosts 1 .dk domain in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 1 unique IPv4 address on this network, and the domains currently sit in 1 IPv4 CIDR block covering roughly 256 addresses of IPv4 space.

We have yet to observe any IPv6 (AAAA) hosting on this AS.

We have not observed any nameservers or mail exchangers for .dk domains on this AS — the domains hosted here run their DNS and mail from other networks.

On the security side, 0 of the domains hosted here (0.0%) validate as DNSSEC-secure — below the zone-wide average for domains with a web address, 70.5%. See how this AS compares on the ASN statistics page, or drill into the CIDR list below the results.

🛰️ Upstream providers of AS12912#

via ipbot.dk

TMPL T-Mobile Polska S.A. announces 50 prefixes (48 IPv4, 2 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS33891Core-Backbone GmbH
100.0%
AS1299TWELVE99 Arelion Sweden AB
68.8%
AS6939Hurricane Electric LLC
21.3%
AS3320DTAG Deutsche Telekom AG
20.4%
AS34549meerfarbig GmbH & Co. KG
5.1%
AS34019Hivane Association
4.2%
AS5405INTERDOTLINK Inter.link GmbH
4.0%
AS4230CLARO S.A.
4.0%
AS35625Eurofiber France SAS
3.8%
AS34177Celeste SAS
3.2%

Upstream and prefix data supplied by ipbot.dk; power is relative to the strongest upstream.

🔻 Networks using AS12912 as upstream#

10 networks
NetworkNameDomainsPower
AS56391VTELECOM VIRTUAL TELECOM SP. Z O.O.—
100.0%
AS49258Domena.pl sp. z o.o.—
55.0%
AS61154INTEGRADESIGN IDHosting Sp. z o. o.—
42.2%
AS43962INTEN Sp. z o. o.—
33.4%
AS50599DATASPACE P.S.A.201
20.2%
AS12824home.pl sp. z o.o.90
14.9%
AS8560IONOS SE1,644
10.1%
AS31229PL-BEYOND-AS Beyond.pl sp. z o.o.33
9.7%
AS51717MUCHA Pawel Mucha, Marcin Mucha SC—
8.8%
AS39288VTELECOM VIRTUAL TELECOM SP. Z O.O.—
3.2%

Among the networks we hold ipbot.dk routing data for (the ones looked up on this site), so this is a sample of the AS's customers, not all of them.

Found 1 domain matching 12912
DomainIPASNISP / OrgCountry
sktelisabeth.dk 193.105.242.83 AS12912 T-Mobile Polska S.A. 🇵🇱 Poland

📡 Known CIDRs#

1 CIDR
CIDRDomains
193.105.242.0/24 1
dhd.dk [/] search Domains, Hosts & DNS — .dk zone