dotc.dk
Last scanned: 2026-08-31 09:54:36  ·  1413ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   77ms
NameserverIP addressesPTRASN / ISP
ns01.one.com 195.206.121.10
2001:67c:28cc::10		 ns01.one.com
ns01.one.com		 AS197495 One.com A/S
AS197495 One.com A/S
ns02.one.com 185.10.11.10
2001:67c:3c0::10		 ns02.one.com
ns02.one.com		 AS51468 One.com A/S
AS51468 One.com A/S
🌍 A Records1 records   71ms
IPTTLPTRASNISP / OrgCIDRCountryCity
87.104.3.9 3600s 87.104.3.9.static.fibianet.dk AS44869 FIBIA P/S 87.104.0.0/18 🇩🇰 Denmark Sakskøbing
📧 MX Records1 records   82ms
PriorityTTLMail ServerIP addressesPTRASN
0 3600s mail.itsup.dk 87.104.3.9 87.104.3.9.static.fibianet.dk AS44869 FIBIA P/S
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records2 records   281ms
TXT Record
v=spf1 include:_custspf.one.com ~all
v=spf1 mx a:mail.itsup.dk ~all
✉️ SPF
⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)
PolicyRecord (dotc.dk)
~all (soft fail) v=spf1 include:_custspf.one.com ~all
~all (soft fail) v=spf1 mx a:mail.itsup.dk ~all
📨 DMARC
PolicyRecord (_dmarc.dotc.dk)
p=reject v=DMARC1; p=reject; rua=mailto:admin@itsup.dk; ruf=mailto:admin@itsup.dk; adkim=s; aspf=s
📬 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)
🔐 DNSSEC223ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA0ms
FieldValue
Serial2026083001
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
77ms
A
71ms
MX
82ms
AAAA
99ms
TXT
281ms
CAA
111ms
HTTPS
125ms
TLSA
191ms
SOA
0ms
MTA-STS
126ms
DNSSEC
223ms
SRV
128ms
Total
1413ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-31 09:54:36 1413ms 2 NS 1 A 1 MX 🔒 Secure View
2026-08-25 17:10:23 619ms 2 NS 1 A 1 MX 🔒 Secure View
2026-08-24 11:17:12 10643ms 2 NS 1 A 1 MX 🔒 Secure View
2026-07-30 10:50:13 4780ms 2 NS 1 A 0 MX 🔒 Secure View
2026-07-02 16:40:46 9916ms 2 NS 1 A 1 MX 🔒 Secure View
2026-06-26 01:42:42 608ms 2 NS 1 A 1 MX 🔒 Secure View
2026-06-19 16:11:59 631ms 3 NS 1 A 1 MX 🔓 Insecure View
2026-06-17 04:25:50 663ms 3 NS 1 A 1 MX 🔓 Insecure View
2026-06-17 04:20:54 559ms 3 NS 1 A 1 MX 🔓 Insecure View
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