niemann.dk
Last scanned: 2026-08-28 00:04:14  ·  947ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   52ms
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   56ms
IPTTLPTRASNISP / OrgCIDRCountryCity
91.221.196.240 43200s — AS51468 One.com A/S 91.221.196.0/23 🇩🇰 Denmark Copenhagen
📧 MX Records2 records   63ms
PriorityTTLMail ServerIP addressesPTRASN
10 600s mail.protonmail.ch 176.119.200.128
185.205.70.128
185.70.42.128		 mail.protonmail.ch
mail.protonmail.ch
mail.protonmail.ch		 AS62371 Proton AG
AS62371 Proton AG
AS62371 Proton AG
20 600s mailsec.protonmail.ch 176.119.200.129
185.205.70.129
185.70.42.129		 mailsec.protonmail.ch
mailsec.protonmail.ch
mailsec.protonmail.ch		 AS62371 Proton AG
AS62371 Proton AG
AS62371 Proton AG
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverniemann.dk → 91.221.196.240
🔶 Autoconfigniemann.dk → 91.221.196.240
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records2 records   198ms
TXT Record
protonmail-verification=a9dbd132c711579dd77d50e26b16588580665c4d
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC5Dv+dBafQvHiCAGExtJQEIiukFUOhlSJf/IPCbDR9WB36vSh1eOqsFAwHNSgVHAroHl1B/Q1S6T7JhUGOm6FCUawufDsRlrzKZl0eoAjeZnp9vO/QomOXnkMr3daYcYFMIweoV/RdxIv9vATidfQl+87WSU2JqyKApYMz/0WxswIDAQAB
✉️ 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.niemann.dk niemann.dk
TXT niemann.dk protonmail-verification=a9dbd132c711579dd77d50e26b16588580665c4d
🔗 TLSA / DANE4 records   131ms
Service / OwnerTypeCert association
SMTP _25._tcp.mail.protonmail.ch DANE-EE · SPKI · SHA-256 6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mail.protonmail.ch DANE-EE · SPKI · SHA-256 76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mailsec.protonmail.ch DANE-EE · SPKI · SHA-256 6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mailsec.protonmail.ch DANE-EE · SPKI · SHA-256 76BB66711DA416433CA890A5B2E5A053…
🔐 DNSSEC99ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA0ms
FieldValue
Serial2026081001
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
52ms
A
56ms
MX
63ms
AAAA
67ms
TXT
198ms
CAA
64ms
HTTPS
68ms
TLSA
131ms
SOA
0ms
MTA-STS
78ms
DNSSEC
99ms
SRV
96ms
Total
947ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-28 00:04:14 947ms 2 NS 1 A 2 MX 🔒 Secure View
2026-08-27 06:40:09 883ms 2 NS 1 A 2 MX 🔒 Secure View
2026-08-12 04:47:41 1144ms 2 NS 1 A 2 MX 🔒 Secure View
2026-07-18 12:38:23 1044ms 2 NS 1 A 2 MX 🔒 Secure View
2026-07-12 11:47:54 9057ms 2 NS 1 A 2 MX 🔒 Secure View
2026-06-24 17:18:48 949ms 2 NS 1 A 2 MX 🔒 Secure View
2026-06-21 12:44:41 1149ms 0 NS 0 A 0 MX ❓ Unknown View
2026-06-18 02:28:44 6824ms 2 NS 1 A 2 MX 🔒 Secure View
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