rtfm.dk

📜 Historical scan 2026-06-24 07:58:31 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rtfm.dk is a .dk domain served by 4 nameservers (ns1.quickdns.dk, ns2.quickdns.dk, ns3.quickdns.dk and 1 more). It was registered on 7 October 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 173.8.116.122 is hosted by Comcast Cable Communications, LLC (AS7922) in United States. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 6 more. The zone is of unknown DNSSEC status, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 74ms

Nameserver	IP addresses	PTR	ASN / 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 Records#

1 records 89ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
173.8.116.122	21600s	HYPERION.STDERR.NET	AS7922	Comcast Cable Communications, LLC	173.8.0.0/13	🇺🇸 United States	Saint Paul

📧 MX Records#

8 records 163ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
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#

Service	CNAME / IP
🔷 Autodiscover	hyperion.stderr.net → 173.8.116.122
🔶 Autoconfig	hyperion.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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 22:54:29

www CNAME	hyperion.stderr.net (all on stderr.net) → 173.8.116.122 (AS7922)
www vs bare domain	Same network rtfm.dk: 173.8.116.122 (AS7922) www.rtfm.dk: 173.8.116.122 (AS7922)
Wildcard	Yes: any name under the zone resolves

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.rtfm.dk	hyperion.stderr.net

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

133ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	broken trust chain resolving 'rtfm.dk/DS/IN': 127.0.0.1#53

🏷️ SOA#

78ms

Field	Value
Serial	2013052300
Primary NS (MNAME)	ns1.quickdns.dk
Responsible (RNAME)	hostmaster@quickdns.dk
Refresh	14400s
Retry	7200s
Expire	2415600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-14 12:45:20

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1998-10-07
Expires	2026-12-31 (74d)

🔗 Same registrant#

1 domain

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
eibner.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

74ms

89ms

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 At	Duration	Records	DNSSEC
2026-10-08 22:54:29	1685ms	4 NS 1 A 8 MX	🔓 Insecure
2026-10-01 01:56:03	1613ms	4 NS 1 A 8 MX	🔓 Insecure
2026-06-24 07:58:31 shown	2319ms	4 NS 1 A 8 MX	❓ Unknown
2026-06-18 06:30:12	2293ms	4 NS 1 A 8 MX	🔓 Insecure