system-design.dk
Last scanned: 2026-08-17 23:09:53  ·  17362ms 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   40ms
IPTTLPTRASNISP / OrgCIDRCountryCity
185.4.216.52 3600s — AS62319 Itm8 A/S 185.4.216.0/22 🇩🇰 Denmark Viby J
📧 MX Records1 records   36ms
PriorityTTLMail ServerIP addressesPTRASN
0 3600s systemdesign-dk01e.mail.protection.outlook.com 2a01:111:f403:ca04::4
2a01:111:f403:ca04::b
2a01:111:f403:ca04::f
2a01:111:f403:ca09::b
52.101.68.32
52.101.68.5
52.101.73.16
52.101.73.8		 mail-db4pr02cu00204.inbound.protection.outlook.com
mail-dbbpr03cu00103.inbound.protection.outlook.com
mail-db7pr03cu00507.inbound.protection.outlook.com
mail-am7pr05cu00103.inbound.protection.outlook.com
mail-db3pr0202cu00200.inbound.protection.outlook.com
mail-du2pr03cu00105.inbound.protection.outlook.com
mail-as2pr05cu00100.inbound.protection.outlook.com
mail-am0pr04cu00500.inbound.protection.outlook.com		 AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
AS8075 Microsoft Corporation
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverautodiscover.outlook.com → 40.98.16.91
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records2 records   197ms
TXT Record
MS=ms77454024
v=spf1 include:spf.protection.outlook.com -all
✉️ SPF
PolicyRecord (system-design.dk)
-all (hard fail) v=spf1 include:spf.protection.outlook.com -all
📨 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
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC152ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA37ms
FieldValue
Serial2026032402
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
40ms
MX
36ms
AAAA
34ms
TXT
197ms
CAA
45ms
HTTPS
36ms
TLSA
174ms
SOA
37ms
MTA-STS
127ms
DNSSEC
152ms
SRV
98ms
Total
17362ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-17 23:09:53 17362ms 2 NS 1 A 1 MX 🔒 Secure View
2026-07-25 21:40:12 5182ms 2 NS 1 A 1 MX 🔒 Secure View
2026-06-26 21:54:49 661ms 2 NS 1 A 1 MX 🔒 Secure View
2026-06-17 20:06:21 1409ms 2 NS 1 A 1 MX 🔒 Secure View
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