krebs.dk
Last scanned: 2026-06-30 10:31:29  ·  851ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   30ms
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 Records4 records   31ms
IPTTLPTRASNISP / OrgCIDRCountryCity
185.199.108.153 43200s cdn-185-199-108-153.github.com AS54113 Fastly, Inc. 185.199.108.0/22 🇺🇸 United States —
185.199.109.153 43200s cdn-185-199-109-153.github.com AS54113 Fastly, Inc. 185.199.108.0/22 🇺🇸 United States —
185.199.110.153 43200s cdn-185-199-110-153.github.com AS54113 Fastly, Inc. 185.199.108.0/22 🇺🇸 United States —
185.199.111.153 43200s cdn-185-199-111-153.github.com AS54113 Fastly, Inc. 185.199.108.0/22 🇺🇸 United States —
📧 MX Records2 records   30ms
PriorityTTLMail ServerIP addressesPTRASN
10 3200s mx1.onlinemail.io 185.21.42.12 mx1.onlinemail.io AS48854 team.blue Denmark A/S
20 43200s mx2.onlinemail.io 46.36.208.16 mx2.onlinemail.io AS48854 team.blue Denmark A/S
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverautodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfigkrebs.dk → 185.199.110.153
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   177ms
TXT Record
v=spf1 a mx ip4:185.21.42.20 ~all
✉️ SPF
PolicyRecord (krebs.dk)
~all (soft fail) v=spf1 a mx ip4:185.21.42.20 ~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
🔏 ACME Challenge
TypeNameValue
CNAME _acme-challenge.krebs.dk godthaab.github.io
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC59ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA35ms
FieldValue
Serial2026032501
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
30ms
A
31ms
MX
30ms
AAAA
30ms
TXT
177ms
CAA
30ms
HTTPS
29ms
TLSA
137ms
SOA
35ms
MTA-STS
240ms
DNSSEC
59ms
SRV
248ms
Total
851ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-30 10:31:29 851ms 2 NS 4 A 2 MX 🔒 Secure View
2026-06-28 05:37:28 1381ms 2 NS 4 A 2 MX 🔒 Secure View
2026-06-20 16:02:48 2744ms 2 NS 4 A 2 MX 🔒 Secure View
2026-06-17 14:36:29 1679ms 2 NS 4 A 2 MX 🔒 Secure View
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