csirt.dk

📜 Historical scan 2026-10-07 20:40:14  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

csirt.dk is a .dk domain served by 4 nameservers (ns1.eurodns.com, ns2.eurodns.com, ns3.eurodns.com and 1 more). It was registered on 8 January 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 18.192.246.145 is hosted by Amazon.com, Inc. (AS16509) in Germany. Mail is handled by mail.csirt.dk. The zone is DNSSEC-signed and validates, 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#

4 records   45ms
NameserverIP addressesPTRASN / ISP
ns1.eurodns.com 199.167.66.107
2610:1c8:b002::107		 ns1.eurodns.com
ns1.eurodns.com		 AS23393 NuCDN LLC
AS23393 NuCDN LLC
ns2.eurodns.com 104.37.178.107
2610:1c8:b001::107		 ns2.eurodns.com
ns2.eurodns.com		 AS23393 NuCDN LLC
AS23393 NuCDN LLC
ns3.eurodns.com 199.167.66.108
2610:1c8:b002::108		 ns3.eurodns.com
ns3.eurodns.com		 AS23393 NuCDN LLC
AS23393 NuCDN LLC
ns4.eurodns.com 104.37.178.108
2610:1c8:b001::108		 ns4.eurodns.com
ns4.eurodns.com		 AS23393 NuCDN LLC
AS23393 NuCDN LLC

🌍 A Records#

3 records   46ms
IPTTLPTRASNISP / OrgCIDRCountryCity
18.192.246.145 600s ec2-18-192-246-145.eu-central-1.compute.amazonaws.com AS16509 Amazon.com, Inc. 18.192.0.0/13 🇩🇪 Germany Frankfurt am Main
18.193.144.171 600s ec2-18-193-144-171.eu-central-1.compute.amazonaws.com AS16509 Amazon.com, Inc. 18.192.0.0/13 🇩🇪 Germany Frankfurt am Main
3.125.131.179 600s ec2-3-125-131-179.eu-central-1.compute.amazonaws.com AS16509 Amazon.com, Inc. 3.96.0.0/11 🇩🇪 Germany Frankfurt am Main

📧 MX Records#

1 records   39ms
PriorityTTLMail ServerIP addressesPTRASN
20 3600s mail.csirt.dk 87.48.146.74 mail.csirt.dk AS3292 TDC Holding A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records   282ms
TXT Record
v=spf1 ip4:87.48.146.68 ip4:87.48.146.74 -all

✉️ SPF#

PolicyRecord (csirt.dk)
-all (hard fail) v=spf1 ip4:87.48.146.68 ip4:87.48.146.74 -all

📨 DMARC#

PolicyRecord (_dmarc.csirt.dk)
p=reject v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:cv1zdpyr@ag.eu.dmarcian.com; ruf=mailto:cv1zdpyr@fr.eu.dmarcian.com;

📬 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 2026-10-13 06:25:47
www18.192.246.145 18.193.144.171 3.125.131.179 (AS16509) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceCompact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found
SelectorCNAMEKey
default — RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

64ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

47ms
FieldValue
Serial2026021043
Primary NS (MNAME)ns1.eurodns.com
Responsible (RNAME)hostmaster@eurodns.com
Refresh43200s
Retry7200s
Expire1209600s
Minimum (neg-cache TTL)86400s

📋 Registration#

WHOIS fetched 2026-10-12 04:40:40
FieldValue
RegistrarEurodns S.A
Registered1998-01-08
Expires2027-03-31 (163d)

🔗 Same registrant#

27 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
businessnet.dkEurodns S.A
fasttv.dkEurodns S.A
mitwifi.dkEurodns S.A
nuudayinfo.dkEurodns S.A
nuuuday.dkEurodns S.A
tdc-cert.dkEurodns S.A
tdc-csirt-soc.dkEurodns S.A
tdc-csirt.dkEurodns S.A
tdc-csirtsoc.dkEurodns S.A
tdc-proton.dkEurodns S.A
tdc-red.dkEurodns S.A
tdc-soc-cert.dkEurodns S.A
tdc-soc-csirt.dkEurodns S.A
tdc-soc.dkEurodns S.A
tdc-soccert.dkEurodns S.A
tdc-soccsirt.dkEurodns S.A
tdcdev.dkEurodns S.A
tdcfiber.dkEurodns S.A
tdckampagneshop.dkEurodns S.A
tdcnet-sharepoint.dkEurodns S.A
tdcnetco.dkEurodns S.A
tdctech.dkEurodns S.A
tdctest.dkEurodns S.A
tdid.dkEurodns S.A
tdk.dkEurodns S.A
testtdc.dkEurodns S.A
threatnet.dkEurodns S.A
📋 WHOIS#

⏱️ Lookup Timing#

NS
45ms
A
46ms
MX
39ms
AAAA
46ms
TXT
282ms
CAA
53ms
HTTPS
51ms
TLSA
90ms
SOA
47ms
MTA-STS
68ms
DNSSEC
64ms
SRV
81ms
Total
612ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-13 06:25:47 1490ms 4 NS 3 A 1 MX 🔒 Secure
2026-10-12 04:19:41 621ms 4 NS 3 A 1 MX 🔒 Secure
2026-10-07 20:40:14 shown 612ms 4 NS 3 A 1 MX 🔒 Secure
2026-10-03 23:32:50 778ms 4 NS 3 A 1 MX 🔒 Secure
2026-10-01 00:44:22 713ms 4 NS 3 A 1 MX 🔒 Secure
2026-09-30 08:25:47 624ms 4 NS 3 A 1 MX 🔒 Secure
2026-09-26 05:30:37 868ms 4 NS 3 A 1 MX 🔒 Secure
2026-09-24 04:38:11 853ms 4 NS 3 A 1 MX 🔒 Secure
2026-09-24 02:52:32 847ms 4 NS 3 A 1 MX 🔒 Secure
2026-09-07 13:03:42 1092ms 4 NS 3 A 1 MX 🔒 Secure
2026-09-03 07:46:36 892ms 4 NS 3 A 1 MX 🔒 Secure
2026-08-28 05:19:36 948ms 4 NS 3 A 1 MX 🔒 Secure
2026-08-18 18:17:44 3877ms 4 NS 3 A 1 MX 🔒 Secure
2026-08-17 13:01:47 2629ms 4 NS 3 A 1 MX 🔒 Secure
2026-08-06 22:17:30 1097ms 4 NS 3 A 1 MX 🔒 Secure
2026-07-29 11:13:58 9831ms 4 NS 3 A 1 MX 🔒 Secure
2026-07-13 14:11:47 1104ms 4 NS 3 A 1 MX 🔒 Secure
2026-06-25 21:48:10 883ms 4 NS 3 A 1 MX 🔒 Secure
2026-06-16 23:05:11 2615ms 4 NS 3 A 1 MX 🔒 Secure
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