rtctransport.dk

📜 Historical scan 2026-09-17 08:59:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rtctransport.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.158.47 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by rtctransport-dk.mail.protection.outlook.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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 38ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	185.25.141.3 2a02:2339:4006:109::dd	ns.dandomain.dk ns.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.dandomain.dk	2a02:2339:1:108::dd:dd 91.197.248.66	ns2.dandomain.dk ns2.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 2036ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.158.47	598s	linux27.dandomain.dk	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 37ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rtctransport-dk.mail.protection.outlook.com	2a01:111:f403:c967::8 2a01:111:f403:ca04::6 2a01:111:f403:ca09::28 2a01:111:f403:ca21::10 52.101.181.156 52.101.185.21 52.101.68.18 52.101.68.36	mail-cpjpr04cu00100.inbound.protection.outlook.com mail-db4pr02cu00406.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-matpr05cu00100.inbound.protection.outlook.com mail-wa4pr05cu00104.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.24

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 81ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

3 records 145ms

TXT Record
knowbe4-site-verification=4660d54e011d620b711f90fdba67c8ad
MS=ms40285647
v=spf1 mx a include:spf.protection.outlook.com include:spf.topdesk.net include:mailgun.org include:mail.zendesk.com -all

✉️ SPF#

Policy	Record (rtctransport.dk)
-all (hard fail)	v=spf1 mx a include:spf.protection.outlook.com include:spf.topdesk.net include:mailgun.org include:mail.zendesk.com -all

📨 DMARC#

Policy	Record (_dmarc.rtctransport.dk)
p=reject	v=DMARC1; p=reject; pct=100; fo=1; ri=3600; sp=reject; ruf=mailto:dmarc-reports@rtctransport.dk; rua=mailto:dmarc-reports@rtctransport.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#

latest probe, not this scan · checked 2026-10-07 23:17:01

www	93.191.158.47 (AS48854) (address records, no CNAME)
www vs bare domain	Same network rtctransport.dk: 93.191.158.47 (AS48854) www.rtctransport.dk: 93.191.158.47 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

3 found

Selector	CNAME	Key
k1	—	RSA · ~1024 bit below 2048 bit
selector1	selector1-rtctransport-dk._domainkey.rtctransport.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-rtctransport-dk._domainkey.rtctransport.onmicrosoft.com	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: 10/10 · policy: -all

warn 10 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

71ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026061201
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

38ms

2036ms

37ms

AAAA

37ms

TXT

145ms

CAA

26ms

HTTPS

38ms

TLSA

465ms

SOA

0ms

MTA-STS

53ms

DNSSEC

71ms

SRV

81ms

Total

2855ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 17:46:50	724ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-28 06:41:07	1053ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-17 08:59:36 shown	2855ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-28 05:33:56	1228ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 00:24:33	706ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-21 21:32:45	596ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-20 18:39:02	1209ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 16:32:36	653ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 03:04:54	1899ms	2 NS 1 A 1 MX	🔒 Secure