rtx.dk

📜 Historical scan 2026-06-23 05:04:33 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rtx.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 18 May 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.107.224.63 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by rtx-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 35ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 32ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
20.107.224.63	600s	—	AS8075	Microsoft Corporation	20.64.0.0/10	🇮🇪 Ireland	Dublin

📧 MX Records#

1 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	1800s	rtx-dk.mail.protection.outlook.com	2a01:111:f403:ca04::a 2a01:111:f403:ca09::20 2a01:111:f403:ca09::3 2a01:111:f403:ca09::e 52.101.68.36 52.101.73.15 52.101.73.24 52.101.73.8	mail-du0pr03cu00102.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am0pr04cu00500.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 → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 144ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

6 records 250ms

TXT Record
apple-domain-verification=PIkdjlxSexhsLhpG
atlassian-domain-verification=5S//riTst/jLrn2NLXdvLTSmgG4Cl7Ze0q7XJY3xATkVWjEwhux77s0KzSMuDJAk
atlassian-sending-domain-verification=57e312c0-babd-4c6d-a6fe-e86e7c3efdad
ciscocidomainverification=5a2e672b6f6a13f5ddac569cab06f496d46eb0b0683efb4ed395d336590bbffa
docusign=07316c65-719d-41dc-934e-5059bb5febe4
v=spf1 include:spf1.emarketeer.com include:mailgun.org include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com include:amazonses.com ~all

✉️ SPF#

Policy	Record (rtx.dk)
~all (soft fail)	v=spf1 include:spf1.emarketeer.com include:mailgun.org include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com include:amazonses.com ~all

📨 DMARC#

Policy	Record (_dmarc.rtx.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:itdepartment@rtx.dk; adkim=r; aspf=r; pct=100

📬 MTA-STS#

458ms

Check	Result
Status	🔒 Enforce
TXT record (_mta-sts)	✓ Found
HTTPS policy	✓ Valid
Mode	enforce
Policy ID	20260224091111Z
max_age	2419200s
Policy MX	rtx-dk.mail.protection.outlook.com, mx.sendgrid.net, feedback-smtp.eu-west-1.amazonses.com

📈 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 2026-10-11 16:55:03

www CNAME	rtx-cdn-exa7h4c0agdmgzae.z01.azurefd.net (all on azurefd.net) → 150.171.109.193 2603:1061:14:c0::1 (AS8075)
www vs bare domain	Same network rtx.dk: 150.171.109.53 (AS8075) www.rtx.dk: 150.171.109.193 2603:1061:14:c0::1 (AS8075)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
k1	dkim.mcsv.net	RSA · ~1024 bit below 2048 bit
selector2	selector2-rtx-dk._domainkey.rtx1.onmicrosoft.com	RSA · ~1024 bit below 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: 11/10 · policy: ~all

error 11 DNS lookups: the limit is 10, so a receiver whose evaluation gets past the 10th returns permerror (SPF fails)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

96ms

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

🏷️ SOA#

36ms

Field	Value
Serial	2026030701
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-05 17:43:42

Field	Value
Registrar	ONE.COM A/S
Registered	1998-05-18
Expires	2031-06-30 (1713d)

📋 WHOIS#

⏱️ Lookup Timing#

35ms

32ms

38ms

AAAA

123ms

TXT

250ms

CAA

124ms

HTTPS

72ms

TLSA

140ms

SOA

36ms

MTA-STS

458ms

DNSSEC

96ms

SRV

144ms

Total

993ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-11 16:55:03	1275ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-06 18:32:18	1411ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-05 17:30:11	1642ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-06 01:00:44	1203ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-05 06:38:09	1262ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-23 14:28:48	5808ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-18 06:47:41	3144ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-11 17:50:08	1484ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-28 06:39:45	1129ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 05:04:33 shown	993ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 23:11:39	977ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 15:34:22	1084ms	2 NS 1 A 1 MX	🔒 Secure