🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS1257, 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#

108 days
3,0803,0913,1033,1143,1252026-07-012026-08-232026-10-16
3,105 latest-12 over 108 days

Active .dk domains whose website address (A record) is announced by AS1257, counted once a day.

🌐 AS1257 at a glance#

Tele2 SWIPnet

AS1257 is announced by Tele2 SWIPnet (Sweden) and currently hosts 3,101 .dk domains in our dataset — 0.24% of all scanned .dk domains. Across all our scans we have observed 95 unique IPv4 addresses on this network, and the domains currently sit in 25 IPv4 CIDR blocks covering roughly 2.8 million addresses of IPv4 space.

IPv6 is live here too: 4 domains (0.1%) publish AAAA records from this AS, resolving to 10 unique IPv6 addresses across 4 prefixes (about 274.9 billion /64 networks of space).

The network is part of the .dk zone's infrastructure too: 43 distinct nameservers and 60 distinct mail exchangers serving .dk domains currently resolve to addresses announced by this AS.

On the security side, 114 of the domains hosted here (3.7%) 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 AS1257#

via ipbot.dk

SWIPNET - Tele2 Sverige AB announces 423 prefixes (386 IPv4, 37 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS1299TWELVE99 Arelion Sweden AB
100.0%
AS6939Hurricane Electric LLC
47.7%
AS174Cogent Communications, LLC
36.3%
AS6453TATA COMMUNICATIONS (AMERICA) INC
28.5%
AS12956TELXIUS TELEFONICA GLOBAL SOLUTIONS SL
14.1%
AS9002RETN Limited
13.9%
AS6762SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.
13.9%
AS6461Zayo Bandwidth
11.2%
AS2914NTT-DATA-2914 - NTT America, Inc.
10.9%
AS3320DTAG Deutsche Telekom AG
3.2%

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

🔻 Networks using AS1257 as upstream#

57 networks
NetworkNameDomainsPower
AS12597GOTANET Gotalandsnatet AB—
100.0%
AS50572ZETUPNET Nordlo Improve AB—
57.0%
AS57208Advania-IMP-SE Advania Sverige AB—
40.6%
AS8240Information System Authority—
39.9%
AS29468Infracom Managed Services AB46
36.0%
AS59807Swedbank AB—
27.0%
AS34686AFFV-AS Affarsverken Karlskrona AB—
22.0%
AS28854HIGHLANDNET-SWEDEN SavMAN AB—
21.9%
AS48803Mediateknik i Varberg AB—
21.7%
AS25252VolvoIT Volvo Information Technology AB—
20.9%
AS34941CYBERCOM-AS Cygrids Communications AB28
20.7%
AS5411Tieto Oyj—
19.9%
AS34946WetterNet-AS Jonkoping Energi AB—
18.1%
AS202296MicroGroup Europe AB—
16.3%
AS60238SCAFP SCA FORESTPRODUCTS AB—
15.9%
AS15912CL-AS Infracom Connect AB—
15.3%
AS202116Scania CV AB—
15.2%
AS39078GDM Konsult AB—
15.0%
AS44320SEBNET-AS Skandinaviska Enskilda Banken AB26
14.8%
AS58343CORE-TELECOMPUTING-SE Advania Sverige AB—
14.4%
AS214302AS-LOOMIS Loomis AB—
14.3%
AS35814Resurs Bank AB—
13.6%
AS198217NIBENET Nibe AB—
13.4%
AS34385Tripnet AB—
13.2%
AS49604Zone Media OU210
13.0%
AS44136ASODERLAND ODERLAND Webbhotell AB1,036
12.1%
AS47467Griffel AB—
12.0%
AS215783Scandinavian Hosting AB—
12.0%
AS49770Internetport Sweden AB—
10.4%
AS51821FORTLAX Cloudist AB—
9.6%
AS8674NETNOD-IX Netnod AB—
9.2%
AS34244Teleservice Bredband Skane AB—
9.1%
AS39570Loopia AB2,759
8.3%
AS43809Forss IT AB17
8.3%
AS39137Unknown—
8.1%
AS197425SAAB-ASN Saab AB—
7.9%
AS43096diaf-ds02 Diagonal Forlags AB—
7.4%
AS41528Loopia AB362
7.1%
AS3301TELIANET-SWEDEN Telia Company AB141
6.4%
AS209041KARNIT CoreIT AB—
6.1%
AS30795BRS Networks AB—
5.6%
AS200820benify Benifex Sweden AB—
5.4%
AS16086DNA Oyj—
4.8%
AS62313Proact IT UK Limited17
3.8%
AS35041NET-BINERO-STHLM1 Binero AB89
3.6%
AS198068PAGM-AS CLOUD.DOG OU—
2.5%
AS29518Bredband2 AB28
2.2%
AS1653SUNET - Vetenskapsradet / SUNET—
2.1%
AS8194VITA VAS "Latvijas Valsts radio un televizijas centrs"—
1.9%
AS15440Baltneta UAB "Baltnetos komunikacijos"—
1.8%
AS16117GAVLENET Gavle Energi AB—
1.4%
AS2586Elisa Eesti AS—
1.3%
AS61189Elkdata OU75
1.1%
AS5538SigmaNet-NIC Institute of Mathematics and Computer Science of University of Latvia—
0.8%
AS202395FAB-NET Fiberaccessbolaget i Sverige AB—
0.7%
AS201201Datalogistics UAB Delska Lithuania—
0.5%
AS8523BASEFARM-SE-ASN Orange Business Digital Sweden AB—
0.1%

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 3,101 domains matching 1257
DomainIPASNISP / OrgCountry
adoore.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
adpt.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
adramatch.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
adrenaline.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
adrepro.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
adsgn.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
advaniagroup.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
aebler.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
aedbilletten.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
afb.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
affaldspresser.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
afry.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
aft.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
afu.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
agerhusene.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
aheadgroup.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ahlens.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ahriise1838.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ahriisespirits.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
aieyewear.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
air1.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
airmagine.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
airshoppen.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
airtours.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ajourgroup.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ajourhealth.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ajoursecurity.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
ajourservices.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
akkfindyourway.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
akolec.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
akr.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
aktivitetshotellet.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
akzin.dk 213.88.149.71 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alecta.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectafastigheter.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectaoptimalpension.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectapensionsforsakring.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectapensionsförsäkring.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectatjanstepension.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectatjanstepensionomsesidig.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectatjänstepension.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alectatjänstepensionömsesidig.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alekta.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alektum-inkasso.dk 213.88.225.187 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alektuminkasso.dk 213.88.225.187 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alfageek.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alfaimmigration.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alfamoving.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alfarelocation.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden
alfascandinavia.dk 193.14.90.203 AS1257 Tele2 SWIPnet 🇸🇪 Sweden

📡 Known CIDRs#

29 CIDRs

🧭 Nameservers in this AS#

43 hosts

📮 Mail Exchangers in this AS#

60 hosts, top 50 shown
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