rtx.dk

Records from scan: 2026-10-11 16:55:03 · 1275ms total · last checked 2026-10-20 09:40 (unchanged)

⬇ 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 150.171.109.53 is hosted by Microsoft Corporation (AS8075) in United States. 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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 25ms

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 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
150.171.109.53	600s	—	AS8075	Microsoft Corporation	150.171.64.0/18	🇺🇸 United States	—

📧 MX Records#

1 records 29ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	1800s	rtx-dk.mail.protection.outlook.com	2a01:111:f403:c967::a 2a01:111:f403:ca3c::8 2a01:111:f403:ca48::a 2a01:111:f403:ca48::c 52.101.103.137 52.101.103.140 52.101.181.153 52.101.185.21	mail-cpjpr05cu00102.inbound.protection.outlook.com mail-zrxpr05cu00100.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-miypr03cu00104.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-zrxpr05cu00105.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 → 52.98.154.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 54ms

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

📝 TXT Records#

7 records 151ms

TXT Record
anthropic-domain-verification-scby6x=FpxX25xCr3TdnyOJDX4jp8v8C
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#

200ms

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#

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#

47ms

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

🏷️ SOA#

17ms

Field	Value
Serial	2026101001
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#

25ms

28ms

29ms

AAAA

29ms

TXT

151ms

CAA

36ms

HTTPS

38ms

TLSA

791ms

SOA

17ms

MTA-STS

200ms

DNSSEC

47ms

SRV

54ms

Total

1275ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-11 16:55:03 shown	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	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