3c.dk DNS records

🖥️ Nameservers5 records 36ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.gigahost.dk	46.183.139.31	ns1.gigahost.dk	AS47292 Sentia Denmark A/S
ns2.gigahost.dk	46.183.139.222	web22.gigahost.dk	AS47292 Sentia Denmark A/S
ns3.gigahost.dk	71.19.249.71	ns3.gigahost.dk	AS11831 eSecureData
ns4.gigahost.dk	51.79.215.130	ns4.gigahost.dk	AS16276 OVH SAS
ns5.gigahost.dk	77.74.192.83	ns5.gigahost.dk	AS42831 UK Dedicated Servers Limited

🌍 A Records1 records 27ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.183.138.100	3600s	—	AS47292	Sentia Denmark A/S	46.183.138.0/23	🇩🇰 Denmark	—

📧 MX Records10 records 26ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	ASPMX.L.GOOGLE.COM	142.251.9.26 2a00:1450:4025:c01::1b	rc-in-f26.1e100.net rd-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	3600s	mx1.gigahost.dk	46.183.139.11	mx1.gigahost.dk	AS47292 Sentia Denmark A/S
10	3600s	mx2.gigahost.dk	46.183.139.12	mx2.gigahost.dk	AS47292 Sentia Denmark A/S
10	3600s	mx3.gigahost.dk	46.183.139.13	mx3.gigahost.dk	AS47292 Sentia Denmark A/S
20	3600s	ALT1.ASPMX.L.GOOGLE.COM	192.178.211.27 2404:6800:4000:1025::1a	lcbomp-in-f27.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
20	3600s	ALT2.ASPMX.L.GOOGLE.COM	192.178.158.26 2404:6800:4013:813::1b	lcdels-in-f26.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	3600s	ASPMX2.GOOGLEMAIL.COM	192.178.158.26 2404:6800:4000:1025::1a	lcdels-in-f26.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	3600s	ASPMX3.GOOGLEMAIL.COM	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1a	yukulwh-in-f27.1e100.net mad01s14-in-f27.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
30	3600s	ASPMX4.GOOGLEMAIL.COM	172.253.158.27 2404:6800:4003:c26::1b	so-in-f27.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	3600s	ASPMX5.GOOGLEMAIL.COM	108.177.125.26 2404:6800:4003:c26::1a	tp-in-f26.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	3c.dk → 46.183.138.100
🔶 Autoconfig	3c.dk → 46.183.138.100

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 201ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	autodiscover.gigahost.dk

📝 TXT Records3 records 134ms

TXT Record
spf2.0/pra
v=spf1 include:aspmx.googlemail.com ~all
v=spf1 mx include:spf.gigahost.dk -all

✉️ SPF

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (3c.dk)
~all (soft fail)	v=spf1 include:aspmx.googlemail.com ~all
-all (hard fail)	v=spf1 mx include:spf.gigahost.dk -all

📨 DMARC

Policy	Record (_dmarc.3c.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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.3c.dk	3c.dk

🔗 TLSA / DANE

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

🔐 DNSSEC194ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2026082701
Primary NS (MNAME)	ns1.gigahost.dk
Responsible (RNAME)	hostmaster@3c.dk
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

36ms

A

27ms

MX

26ms

AAAA

263ms

TXT

134ms

CAA

26ms

HTTPS

186ms

TLSA

89ms

SOA

0ms

MTA-STS

47ms

DNSSEC

194ms

SRV

201ms

Total

909ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 14:51:16	909ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-08-26 14:24:42	3027ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-08-25 16:07:08	9288ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-08-21 00:16:06	3116ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-08-13 15:44:58	7466ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-08-07 11:14:53	1872ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-07-31 11:26:48	2240ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-07-23 13:47:27	17864ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-07-17 09:29:46	3623ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-07-09 03:18:43	2488ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-07-03 14:53:08	1297ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-06-26 14:35:52	1451ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-06-24 15:05:43	876ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-06-21 06:36:06	1055ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-06-21 03:19:09	820ms	5 NS 1 A 10 MX	🔓 Insecure	View
2026-06-16 12:39:06	987ms	5 NS 1 A 10 MX	🔓 Insecure	View