3c.dk

📜 Historical scan 2026-08-26 14:24:42  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3c.dk is a .dk domain served by 5 nameservers (ns1.gigahost.dk, ns2.gigahost.dk, ns3.gigahost.dk and 2 more). It was registered on 2 December 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.183.138.100 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by ASPMX.L.GOOGLE.COM, mx1.gigahost.dk and 8 more. The zone is not DNSSEC-signed, 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#

5 records   43ms
NameserverIP addressesPTRASN / 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 Records#

1 records   192ms
IPTTLPTRASNISP / OrgCIDRCountryCity
46.183.138.100 3600s — AS47292 Sentia Denmark A/S 46.183.138.0/23 🇩🇰 Denmark —

📧 MX Records#

10 records   221ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s ASPMX.L.GOOGLE.COM 172.253.130.26
2a00:1450:4010:c0e::1b
2a00:1450:4010:c0e::1b		 yulppbn-in-f26.1e100.net
lu-in-x1b.1e100.net
lu-in-f27.1e100.net		 AS15169 Google LLC
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 192.178.158.26
2404:6800:4013:813::1a		 lcdels-in-f26.1e100.net
lcdels-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
20 3600s ALT2.ASPMX.L.GOOGLE.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 ASPMX2.GOOGLEMAIL.COM 192.178.158.26
2404:6800:4013:813::1a		 lcdels-in-f26.1e100.net
lcdels-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::1a		 so-in-f27.1e100.net
so-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
30 3600s ASPMX5.GOOGLEMAIL.COM 108.177.125.27
2404:6800:4008:c01::1a		 tp-in-f27.1e100.net
tp-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover3c.dk → 46.183.138.100
🔶 Autoconfig3c.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 Records#

1 records   322ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 10 10 443 autodiscover.gigahost.dk

📝 TXT Records#

3 records   277ms
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)
PolicyRecord (3c.dk)
~all (soft fail) v=spf1 include:aspmx.googlemail.com ~all
-all (hard fail) v=spf1 mx include:spf.gigahost.dk -all

📨 DMARC#

PolicyRecord (_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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-15 09:24:24
www CNAME3c.dk (all on 3c.dk)
www vs bare domainSame network
WildcardYes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: ~all

  • error 2 SPF records: receivers must treat that as a permanent error (RFC 7208 §4.5)

🔏 ACME Challenge#

TypeNameValue
CNAME _acme-challenge.3c.dk 3c.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

2051ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2026082001
Primary NS (MNAME)ns1.gigahost.dk
Responsible (RNAME)hostmaster@3c.dk
Refresh10800s
Retry3600s
Expire604800s
Minimum (neg-cache TTL)3600s

📋 Registration#

WHOIS fetched 2026-10-08 21:12:15
FieldValue
RegistrarGIGAHOST ApS
Registered2002-12-02
Expires2026-12-31 (75d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
43ms
A
192ms
MX
221ms
AAAA
183ms
TXT
277ms
CAA
213ms
HTTPS
69ms
TLSA
131ms
SOA
0ms
MTA-STS
79ms
DNSSEC
2051ms
SRV
322ms
Total
3027ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-15 09:24:24 1150ms 5 NS 1 A 10 MX 🔓 Insecure
2026-10-08 20:58:34 1442ms 5 NS 1 A 10 MX 🔓 Insecure
2026-10-01 20:02:13 1147ms 5 NS 1 A 10 MX 🔓 Insecure
2026-09-30 19:58:38 1231ms 5 NS 1 A 10 MX 🔓 Insecure
2026-09-24 16:36:33 1160ms 5 NS 1 A 10 MX 🔓 Insecure
2026-09-17 15:06:12 1597ms 5 NS 1 A 10 MX 🔓 Insecure
2026-09-12 23:54:26 1588ms 5 NS 1 A 10 MX 🔓 Insecure
2026-09-04 10:27:16 912ms 5 NS 1 A 10 MX 🔓 Insecure
2026-08-27 14:51:16 909ms 5 NS 1 A 10 MX 🔓 Insecure
2026-08-26 14:24:42 shown 3027ms 5 NS 1 A 10 MX 🔓 Insecure
2026-08-25 16:07:08 9288ms 5 NS 1 A 10 MX 🔓 Insecure
2026-08-21 00:16:06 3116ms 5 NS 1 A 10 MX 🔓 Insecure
2026-08-13 15:44:58 7466ms 5 NS 1 A 10 MX 🔓 Insecure
2026-08-07 11:14:53 1872ms 5 NS 1 A 10 MX 🔓 Insecure
2026-07-31 11:26:48 2240ms 5 NS 1 A 10 MX 🔓 Insecure
2026-07-23 13:47:27 17864ms 5 NS 1 A 10 MX 🔓 Insecure
2026-07-17 09:29:46 3623ms 5 NS 1 A 10 MX 🔓 Insecure
2026-07-09 03:18:43 2488ms 5 NS 1 A 10 MX 🔓 Insecure
2026-07-03 14:53:08 1297ms 5 NS 1 A 10 MX 🔓 Insecure
2026-06-26 14:35:52 1451ms 5 NS 1 A 10 MX 🔓 Insecure
2026-06-24 15:05:43 876ms 5 NS 1 A 10 MX 🔓 Insecure
2026-06-21 06:36:06 1055ms 5 NS 1 A 10 MX 🔓 Insecure
2026-06-21 03:19:09 820ms 5 NS 1 A 10 MX 🔓 Insecure
2026-06-16 12:39:06 987ms 5 NS 1 A 10 MX 🔓 Insecure
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