🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS12129, 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#

42 days
011222026-07-012026-07-212026-08-11
1 latest0 over 42 days

Active .dk domains whose website address (A record) is announced by AS12129, counted once a day.

🛰️ Upstream providers of AS12129#

via ipbot.dk

123.Net, Inc. announces 52 prefixes (48 IPv4, 4 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS6939Hurricane Electric LLC
100.0%
AS6461Zayo Bandwidth
21.9%
AS1299TWELVE99 Arelion Sweden AB
9.9%
AS174Cogent Communications, LLC
9.0%
AS3356Level 3 Parent, LLC
8.5%
AS6453TATA COMMUNICATIONS (AMERICA) INC
6.0%
AS2914NTT-DATA-2914 - NTT America, Inc.
5.6%
AS3257GTT-BACKBONE GTT Communications Inc.
5.3%
AS237MERIT-AS-14 - Merit Network Inc.
1.5%
AS396998Path Network, Inc.
1.3%

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

🔻 Networks using AS12129 as upstream#

1 network
NetworkNameDomainsPower
AS267Nether.Net—
100.0%

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 0 domains matching 12129
🔍
No results found in the database.

📮 Mail Exchangers in this AS#

1 host
HostnameDomains
mx5.openpop3.com 1
dhd.dk [/] search Domains, Hosts & DNS — .dk zone