3cgroups.dk DNS records

🖥️ Nameservers4 records 37ms

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 Records1 records 39ms

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 Records1 records 41ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	3cgroups-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca04::d 2a01:111:f403:ca09::5 2a01:111:f403:ca09::e 52.101.68.10 52.101.68.8 52.101.73.26 52.101.73.4	mail-db4pr02cu00307.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-as9pr05cu01302.inbound.protection.outlook.com mail-am0pr83cu00404.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 → 52.98.149.136
🔶 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 Records1 records 119ms

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

📝 TXT Records6 records 290ms

TXT Record
_7la4rdjqj2ru9wpmhk5vgvnyyzz6edy
/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

🔗 TLSA / DANE

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

🔐 DNSSEC140ms

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

🏷️ SOA0ms

Field	Value
Serial	2026022530
Primary NS (MNAME)	ns1.eurodns.com
Responsible (RNAME)	hostmaster@eurodns.com
Refresh	43200s
Retry	7200s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

37ms

A

39ms

MX

41ms

AAAA

50ms

TXT

290ms

CAA

52ms

HTTPS

51ms

TLSA

313ms

SOA

0ms

MTA-STS

101ms

DNSSEC

140ms

SRV

119ms

Total

1425ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 19:01:47	1213ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-08-26 15:42:09	3351ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-08-16 19:09:53	17254ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-08-04 04:39:47	1425ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-07-30 04:59:59	3427ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-07-12 16:34:05	10700ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-25 19:22:28	882ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-16 12:49:34	1852ms	4 NS 1 A 1 MX	🔒 Secure	View