rtfm.dk
Last scanned: 2026-06-24 07:58:31  ·  2319ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers4 records   74ms
NameserverIP addressesPTRASN / ISP
ns1.quickdns.dk 178.62.214.234
2a03:b0c0:2:d0::552:9001		 —
—		 AS14061 DigitalOcean, LLC
AS14061 DigitalOcean, LLC
ns2.quickdns.dk 185.126.153.42 amy.quickdns.dk AS47527 DLX A/S
ns3.quickdns.dk 178.62.214.234
2a03:b0c0:2:d0::552:9001		 —
—		 AS14061 DigitalOcean, LLC
AS14061 DigitalOcean, LLC
ns4.quickdns.dk 185.126.153.42 amy.quickdns.dk AS47527 DLX A/S
🌍 A Records1 records   89ms
IPTTLPTRASNISP / OrgCIDRCountryCity
173.8.116.122 21600s HYPERION.STDERR.NET AS7922 Comcast Cable Communications, LLC 173.8.0.0/13 🇺🇸 United States Saint Paul
📧 MX Records8 records   163ms
PriorityTTLMail ServerIP addressesPTRASN
1 21600s aspmx.l.google.com 142.250.147.27
2a00:1450:4010:c20::1b		 rd-in-f27.1e100.net
yulppbn-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
5 21600s alt1.aspmx.l.google.com 192.178.211.27
2404:6800:4000:1025::1b		 lcbomp-in-f27.1e100.net
lcbomp-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
5 21600s alt2.aspmx.l.google.com 172.253.158.26
2404:6800:4003:c26::1a		 so-in-f26.1e100.net
so-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 21600s aspmx2.googlemail.com 172.253.158.27
2404:6800:4003:c26::1a		 so-in-f27.1e100.net
so-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 21600s aspmx3.googlemail.com 172.253.158.27
2404:6800:4008:c01::1b		 so-in-f27.1e100.net
tp-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 21600s aspmx4.googlemail.com 192.178.230.27
2404:6800:400b:c01b::1a		 yunrtab-in-f27.1e100.net
yunrtab-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 21600s aspmx5.googlemail.com 173.194.43.26
2404:6800:400b:c01b::1b		 yudlsqd-in-f26.1e100.net
yunrtab-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 21600s pasiphae.stderr.net 173.8.116.123 173-8-116-123-Minnesota.hfc.comcastbusiness.net AS7922 Comcast Cable Communications, LLC
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscoverhyperion.stderr.net → 173.8.116.122
🔶 Autoconfighyperion.stderr.net → 173.8.116.122
🔷 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.rtfm.dk hyperion.stderr.net
🔗 TLSA / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC133ms
CheckResult
Validation Status❓ Unknown
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsbroken trust chain resolving 'rtfm.dk/DS/IN': 127.0.0.1#53
🏷️ SOA78ms
FieldValue
Serial2013052300
Primary NS (MNAME)ns1.quickdns.dk
Responsible (RNAME)hostmaster@quickdns.dk
Refresh14400s
Retry7200s
Expire2415600s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
74ms
A
89ms
MX
163ms
AAAA
120ms
TXT
480ms
CAA
183ms
HTTPS
80ms
TLSA
710ms
SOA
78ms
MTA-STS
419ms
DNSSEC
133ms
SRV
391ms
Total
2319ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-24 07:58:31 2319ms 4 NS 1 A 8 MX ❓ Unknown View
2026-06-18 06:30:12 2293ms 4 NS 1 A 8 MX 🔓 Insecure View
dhd.dk [/] search Domains, Hosts & DNS — .dk zone