nikolajhollaender.dk
Last scanned: 2026-08-27 13:12:24  ·  746ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   43ms
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   48ms
IPTTLPTRASNISP / OrgCIDRCountryCity
192.30.252.153 43200s lb-192-30-252-153-iad.github.com AS36459 GitHub, Inc. 192.30.252.0/22 🇺🇸 United States —
📧 MX Records1 records   38ms
PriorityTTLMail ServerIP addressesPTRASN
0 300s .  Null MX — domain accepts no email (RFC 7505)
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverjacobfred88.github.io → 185.199.111.153
🔶 Autoconfigjacobfred88.github.io → 185.199.111.153
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records
📝
No TXT records found
✉️ SPF
✗ No SPF record — mail spoofing not restricted
📨 DMARC
✗ No DMARC record — mail spoofing not restricted
📬 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
TypeNameValue
CNAME _acme-challenge.nikolajhollaender.dk jacobfred88.github.io
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC91ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA0ms
FieldValue
Serial2026080701
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
43ms
A
48ms
MX
38ms
AAAA
37ms
TXT
189ms
CAA
61ms
HTTPS
46ms
TLSA
79ms
SOA
0ms
MTA-STS
112ms
DNSSEC
91ms
SRV
97ms
Total
746ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-27 13:12:24 746ms 2 NS 1 A 1 MX 🔒 Secure View
2026-08-08 01:02:49 763ms 2 NS 1 A 1 MX 🔒 Secure View
2026-07-10 12:10:56 2769ms 2 NS 1 A 1 MX 🔒 Secure View
2026-06-26 21:09:41 730ms 2 NS 1 A 1 MX 🔒 Secure View
2026-06-17 13:27:19 1737ms 2 NS 1 A 0 MX 🔒 Secure View
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