rtcu.dk DNS records

🖥️ Nameservers3 records 38ms

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 Records1 records 39ms

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 Records1 records 95ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	SMTP.GOOGLE.COM	173.194.220.27 173.194.221.26 173.194.221.27 173.194.222.27 2a00:1450:4010:c09::1a 2a00:1450:4010:c09::1a 2a00:1450:4010:c09::1b 2a00:1450:4010:c09::1b 2a00:1450:4010:c0a::1a 2a00:1450:4010:c0a::1a 2a00:1450:4010:c0a::1b 2a00:1450:4010:c0a::1b 64.233.163.26	lk-in-f27.1e100.net lm-in-f26.1e100.net lm-in-f27.1e100.net lo-in-f27.1e100.net lk-in-x1a.1e100.net lk-in-f26.1e100.net lk-in-x1b.1e100.net lk-in-f27.1e100.net lm-in-f26.1e100.net lm-in-x1a.1e100.net lm-in-f27.1e100.net lm-in-x1b.1e100.net lj-in-f26.1e100.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 Records1 records 230ms

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

🔏 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)

🔐 DNSSEC156ms

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

🏷️ SOA0ms

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

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

38ms

A

39ms

MX

95ms

AAAA

70ms

TXT

230ms

CAA

68ms

HTTPS

62ms

TLSA

8096ms

SOA

0ms

MTA-STS

49ms

DNSSEC

156ms

SRV

143ms

Total

9307ms

🕐 Scan History

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