gcm.dk

📜 Historical scan 2026-06-17 10:12:38 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

gcm.dk is a .dk domain served by 2 nameservers (ns01.danskinternet.dk, ns02.danskinternet.dk). It was registered on 27 July 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.30.215.136 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by gcm-dk.mail.protection.outlook.com. 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#

2 records 61ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.danskinternet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns02.danskinternet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 46ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.30.215.136	—	webcluster1.webpod17-cph3.one.com	AS51468	One.com A/S	46.30.208.0/21	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 58ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	gcm-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::8 2a01:111:f403:ca09::6 2a01:111:f403:ca09::9 52.101.68.3 52.101.68.32 52.101.68.39 52.101.73.30	mail-dbapr03cu00100.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-db7pr03cu00403.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 323ms

TXT Record
v=spf1 include:spf.danskinternet.dk include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF#

Policy	Record (gcm.dk)
-all (hard fail)	v=spf1 include:spf.danskinternet.dk include:spf.protection.outlook.com include:_custspf.one.com -all

📨 DMARC#

Policy	Record (_dmarc.gcm.dk)
p=quarantine	v=DMARC1; p=quarantine; pct=100;

📬 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 11:20:06

www CNAME	gcm.dk (all on gcm.dk) → 46.30.215.136 (AS51468)
www vs bare domain	Same network gcm.dk: 46.30.215.136 (AS51468) www.gcm.dk: 46.30.215.136 (AS51468)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-gcm-dk._domainkey.danskinternet.onmicrosoft.com	RSA · ~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: 8/10 · policy: -all

warn 8 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

146ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

67ms

Field	Value
Serial	2026041001
Primary NS (MNAME)	ns01.danskinternet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-19 01:39:57

Field	Value
Registrar	CURANET A/S
Registered	1999-07-27
Expires	2027-09-30 (346d)

🔗 Same registrant#

15 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).

Domain	Registrar
44982500.dk	CURANET A/S
ai-sim.dk	CURANET A/S
callai.dk	CURANET A/S
cmevent.dk	CURANET A/S
cphplastikkirugi.dk	CURANET A/S
ldstudio.dk	CURANET A/S
ldstudios.dk	CURANET A/S
mailsvar.dk	CURANET A/S
profilautoteknik.dk	CURANET A/S
receptionistagent.dk	CURANET A/S
riisbisgaard.dk	CURANET A/S
telem.dk	CURANET A/S
telep.dk	CURANET A/S
vimaconsult.dk	CURANET A/S
webopslag.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

61ms

46ms

58ms

AAAA

53ms

TXT

323ms

CAA

56ms

HTTPS

47ms

TLSA

827ms

SOA

67ms

MTA-STS

134ms

DNSSEC

146ms

SRV

0ms

Total

2735ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 05:23:23	1112ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-01 00:16:28	835ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-05 00:02:19	1378ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-17 14:06:46	9085ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 10:12:38 shown	2735ms	2 NS 1 A 1 MX	🔒 Secure