gbl21.dk

📜 Historical scan 2026-09-25 15:21:01  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

gbl21.dk is a .dk domain served by 2 nameservers (ns1.aau.dk, ns2.aau.dk). It was registered on 27 November 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 130.225.57.55 is hosted by IDDQD-AS (AS1835) in Denmark. Mail is handled by .. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records   37ms
NameserverIP addressesPTRASN / ISP
ns1.aau.dk 130.225.52.5
2001:878:300:1::5		 ns1.aau.dk
ns1.aau.dk		 AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education
AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education
ns2.aau.dk 130.225.54.5
2001:878:300:100::5		 ns2.aau.dk
ns2.aau.dk		 AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education
AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education

🌍 A Records#

1 records   2037ms
IPTTLPTRASNISP / OrgCIDRCountryCity
130.225.57.55 3598s — AS1835 IDDQD-AS 130.225.0.0/16 🇩🇰 Denmark —

📧 MX Records#

1 records   44ms
PriorityTTLMail ServerIP addressesPTRASN
0 3600s .  Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   241ms
TXT Record
v=spf1 -all

✉️ SPF#

PolicyRecord (gbl21.dk)
-all (hard fail) v=spf1 -all

📨 DMARC#

PolicyRecord (_dmarc.gbl21.dk)
p=reject v=DMARC1; p=reject;

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 01:11:28
www130.225.57.55 (AS1835) (address records, no CNAME)
www vs bare domainSame network
gbl21.dk: 130.225.57.55 (AS1835)
www.gbl21.dk: 130.225.57.55 (AS1835)
WildcardNo

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔏 ACME Challenge#

TypeNameValue
CNAME _acme-challenge.gbl21.dk 410161f6-5038-4bcf-a6ce-4a4f19464b37.acme.aau.dk
TXT 410161f6-5038-4bcf-a6ce-4a4f19464b37.acme.aau.dk UJBzo-5IDsfH_Ua-wLFM5b4tjn0niOp-w392BgAPRBU
TXT 410161f6-5038-4bcf-a6ce-4a4f19464b37.acme.aau.dk iXGuQAFfeusV8mcw8u7a4b_d7T8bCUvpWZNASNTFKSQ

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

63ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2023091901
Primary NS (MNAME)ns1.aau.dk
Responsible (RNAME)hostmaster@its.aau.dk
Refresh3600s
Retry900s
Expire1209600s
Minimum (neg-cache TTL)86400s

📋 Registration#

WHOIS fetched 2026-10-16 23:44:40
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2015-11-27
Expires2026-11-30 (38d)

🔗 Same registrant#

172 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

DomainRegistrar
3dgi.dkPunktum dk A/S (direct)
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aalborg-university.dkPunktum dk A/S (direct)
aalborgbusinessschool.dkPunktum dk A/S (direct)
aalborguniversitet.dkPunktum dk A/S (direct)
aalborguniversitetsbibliotek.dkPunktum dk A/S (direct)
aau-bbm.dkPunktum dk A/S (direct)
aau-build.dkPunktum dk A/S (direct)
aau-cph.dkPunktum dk A/S (direct)
aau-kbh.dkPunktum dk A/S (direct)
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aaubuild.dkPunktum dk A/S (direct)
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aauentrepreneurs.dkPunktum dk A/S (direct)
aauk.dkPunktum dk A/S (direct)
aauni.dkPunktum dk A/S (direct)
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aausat7.dkPunktum dk A/S (direct)
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beregningsprogrammet.dkPunktum dk A/S (direct)
betterhearing.dkPunktum dk A/S (direct)
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built.dkPunktum dk A/S (direct)
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byggedialog.dkPunktum dk A/S (direct)
byggeevaluering.dkPunktum dk A/S (direct)
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cykeljakke.dkPunktum dk A/S (direct)
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datasteward.dkPunktum dk A/S (direct)
datastewards.dkPunktum dk A/S (direct)
datastewardship.dkPunktum dk A/S (direct)
dbur.dkPunktum dk A/S (direct)
dcea.dkPunktum dk A/S (direct)
designnews.dkPunktum dk A/S (direct)
designresearch.dkPunktum dk A/S (direct)
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dnf-aalborg.dkPunktum dk A/S (direct)
ecomacundervisning.dkPunktum dk A/S (direct)
ecswr2017.dkPunktum dk A/S (direct)
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flytverden.dkPunktum dk A/S (direct)
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forskningsdata.dkPunktum dk A/S (direct)
forvaltningsretskonferencen.dkPunktum dk A/S (direct)
hemaclass.dkPunktum dk A/S (direct)
hjerteportalen.dkPunktum dk A/S (direct)
iccas17.dkPunktum dk A/S (direct)
ictnorcom.dkPunktum dk A/S (direct)
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Showing 100 of 172.

📋 WHOIS#

⏱️ Lookup Timing#

NS
37ms
A
2037ms
MX
44ms
AAAA
43ms
TXT
241ms
CAA
48ms
HTTPS
54ms
TLSA
53ms
SOA
0ms
MTA-STS
73ms
DNSSEC
63ms
SRV
69ms
Total
2349ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-08 01:11:28 486ms 2 NS 1 A 1 MX 🔓 Insecure
2026-09-29 15:01:33 1523ms 2 NS 1 A 1 MX 🔓 Insecure
2026-09-25 15:21:01 shown 2349ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-27 03:17:23 633ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-22 22:44:48 734ms 2 NS 1 A 1 MX 🔓 Insecure
2026-06-17 09:22:16 4225ms 2 NS 1 A 0 MX 🔓 Insecure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone