rtcu.dk

Records from scan: 2026-10-04 09:52:13 · 448ms total · last checked 2026-10-19 05:36 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rtcu.dk is a .dk domain served by 3 nameservers (ns1.dns.services, ns2.dns.services, ns3.dns.services). It was registered on 8 September 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.186.32.148 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by SMTP.GOOGLE.COM. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

3 records 35ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dns.services	195.242.131.6 2001:67c:564:ffff::11	ns1.dns.services ns1.dns.services	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.dns.services	2a00:1b18:2:3:3::2 62.69.152.37	ns2.dns.services ns2.dns.services	AS47527 DLX A/S AS47527 DLX A/S
ns3.dns.services	185.55.197.53	ns3.dns.services	AS60153 Inpadi ApS

🌍 A Records#

1 records 35ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.186.32.148	3600s	5.186.32.148.static.fibianet.dk	AS44869	FIBIA P/S	5.186.0.0/16	🇩🇰 Denmark	Horsens

📧 MX Records#

1 records 34ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	SMTP.GOOGLE.COM	173.194.73.27 209.85.233.26 209.85.233.27 2a00:1450:4010:c01::1a 2a00:1450:4010:c01::1a 2a00:1450:4010:c01::1b 2a00:1450:4010:c01::1b 2a00:1450:4010:c03::1a 2a00:1450:4010:c03::1a 2a00:1450:4010:c03::1b 2a00:1450:4010:c03::1b 64.233.161.26 64.233.161.27	lq-in-f27.1e100.net lr-in-f26.1e100.net lr-in-f27.1e100.net lh-in-x1a.1e100.net lh-in-f26.1e100.net lh-in-f27.1e100.net lh-in-x1b.1e100.net lr-in-f26.1e100.net lr-in-x1a.1e100.net lr-in-x1b.1e100.net lr-in-f27.1e100.net lh-in-f26.1e100.net lh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 143ms

TXT Record
v=spf1 include:_spf.google.com ~all

✉️ SPF#

Policy	Record (rtcu.dk)
~all (soft fail)	v=spf1 include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.rtcu.dk)
p=none (monitor only)	v=DMARC1; p=none;sp=reject;pct=100;adkim=r;aspf=r;ri=3600;rua=mailto:admin@rtcu.dk

📬 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#

checked 2026-10-17 04:07:19

www CNAME	www.logicio.com (all on logicio.com) → 5.186.32.148 (AS44869)
www vs bare domain	Same network rtcu.dk: 5.186.32.148 (AS44869) www.rtcu.dk: 5.186.32.148 (AS44869)
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
google	—	RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.rtcu.dk	g15ErHfbYyEdmv8Ir-6jBCDRP0DmWyZbNQP1D6NOGc4

🔗 TLSA / DANE#

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

🔐 DNSSEC#

61ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

32ms

Field	Value
Serial	2025082935
Primary NS (MNAME)	ns1.dns.services
Responsible (RNAME)	post@dns.services
Refresh	10800s
Retry	3600s
Expire	1814400s
Minimum (neg-cache TTL)	7200s

📋 Registration#

WHOIS fetched 2026-10-18 10:37:44

Field	Value
Registrar	dns.services ApS
Registered	2000-09-08
Expires	2027-09-30 (345d)

🔗 Same registrant#

2 domains

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
m2mstudio.dk	dns.services ApS
speedmaster.dk	dns.services ApS

📋 WHOIS#

⏱️ Lookup Timing#

35ms

34ms

AAAA

35ms

TXT

143ms

CAA

33ms

HTTPS

36ms

TLSA

49ms

SOA

32ms

MTA-STS

44ms

DNSSEC

61ms

SRV

42ms

Total

448ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 09:52:13 shown	448ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-24 20:58:05	624ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-01 11:18:47	693ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-19 16:26:39	9307ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-18 09:20:14	1269ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-16 08:41:18	1157ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-27 13:13:31	3566ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-23 15:00:42	1164ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-18 03:00:53	651ms	3 NS 1 A 1 MX	🔒 Secure