3cgroups.dk

📜 Historical scan 2026-10-10 00:13:44 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3cgroups.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 28 June 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.105.216.38 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by 3cgroups-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#

4 records 49ms

Nameserver	IP addresses	PTR	ASN / 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#

1 records 37ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
20.105.216.38	3600s	—	AS8075	Microsoft Corporation	20.64.0.0/10	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

1 records 35ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	3cgroups-dk.mail.protection.outlook.com	2a01:111:f403:ca09::26 2a01:111:f403:ca21::10 2a01:111:f403:ca21::a 2a01:111:f403:ca21::c 52.101.209.28 52.101.68.21 52.101.91.153 52.101.91.162	mail-am8pr83cu00106.inbound.protection.outlook.com mail-matpr05cu00100.inbound.protection.outlook.com mail-maspr04cu00102.inbound.protection.outlook.com mail-matpr04cu00204.inbound.protection.outlook.com mail-cpjpr05cu00104.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-matpr04cu00101.inbound.protection.outlook.com mail-matpr04cu00302.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

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24
🔶 Autoconfig	80.92.65.188

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 83ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

7 records 259ms

TXT Record
_7la4rdjqj2ru9wpmhk5vgvnyyzz6edy
_8dbdoruk7fph7guaru32h10xeekvc0b
/wFUIguPItCvVi32v7IwSJF87d2nnd4WMNBP4sbGq+EE4eXYGJVfVUrNLzI6+gYij/A45rCDasTzPO9W/cGB+w==
MS=ms79028971
o46VgX/pqlck9hTM5YCG7p1sipyRjYeRIjxa65NfD0k=
v=spf1 ip4:194.182.232.130 include:spf.protection.outlook.com -all
ZCLdXvV+2ytGMB/mLHvAUcQBMoI56jJHRQjq+DOClUc=

✉️ SPF#

Policy	Record (3cgroups.dk)
-all (hard fail)	v=spf1 ip4:194.182.232.130 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.3cgroups.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email

📬 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 2026-10-12 03:11:45

www	80.92.65.188 (AS24611) (address records, no CNAME)
www vs bare domain	Different networks 3cgroups.dk: 20.105.216.38 (AS8075) www.3cgroups.dk: 80.92.65.188 (AS24611) (all like this)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-3cgroups-dk._domainkey.3cretail.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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

54ms

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

🏷️ SOA#

50ms

Field	Value
Serial	2026100501
Primary NS (MNAME)	ns1.eurodns.com
Responsible (RNAME)	hostmaster@eurodns.com
Refresh	43200s
Retry	7200s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-12 15:06:33

Field	Value
Registrar	Eurodns S.A
Registered	2007-06-28
Expires	2027-06-30 (256d)

🔗 Same registrant#

8 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
3cbolig.dk	Eurodns S.A
3cholding.dk	Eurodns S.A
8x8.dk	Eurodns S.A
d-e-r.dk	Eurodns S.A
derprivatfinans.dk	Eurodns S.A
leasy.dk	Eurodns S.A
lejehvidevarer.dk	Eurodns S.A
viigalaan.dk	Eurodns S.A

📋 WHOIS#

⏱️ Lookup Timing#

49ms

37ms

35ms

AAAA

45ms

TXT

259ms

CAA

32ms

HTTPS

35ms

TLSA

616ms

SOA

50ms

MTA-STS

63ms

DNSSEC

54ms

SRV

83ms

Total

1174ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 03:11:45	1146ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-11 02:32:25	1850ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-10 00:13:44 shown	1174ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-06 07:28:38	1543ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-06 07:20:08	1308ms	4 NS 1 A 1 MX	🔒 Secure
2026-10-01 05:43:39	1278ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-27 04:23:21	979ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-24 02:51:20	963ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-04 07:26:10	1371ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-27 19:01:47	1213ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-26 15:42:09	3351ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-16 19:09:53	17254ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-04 04:39:47	1425ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-30 04:59:59	3427ms	4 NS 1 A 1 MX	🔒 Secure
2026-07-12 16:34:05	10700ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-25 19:22:28	882ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:49:34	1852ms	4 NS 1 A 1 MX	🔒 Secure