c-mu.dk

Records from scan: 2026-10-01 03:08:26 · 1001ms total · last checked 2026-10-18 05:10 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c-mu.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 21 February 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.158.22 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by cmu-dk0c.k-v1.mx.microsoft. 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 84ms

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 47ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.158.22	3600s	linux16.dandomain.dk	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 71ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	cmu-dk0c.k-v1.mx.microsoft	2a01:111:f403:c967::8 2a01:111:f403:ca21::10 2a01:111:f403:ca3c::6 2a01:111:f403:ca48::e 52.101.181.153 52.101.209.28 52.101.73.123 52.101.73.126	mail-cpjpr04cu00100.inbound.protection.outlook.com mail-matpr05cu00100.inbound.protection.outlook.com mail-zrxpr04cu00106.inbound.protection.outlook.com mail-miypr03cu00206.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-cpjpr05cu00104.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com mail-am8pr83cu00106.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
🔶 Autoconfig	93.191.158.22

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 96ms

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

📝 TXT Records#

1 records 179ms

TXT Record
v=spf1 ip4:40.115.24.223 include:spf.protection.outlook.com include:outlook.com -all

✉️ SPF#

Policy	Record (c-mu.dk)
-all (hard fail)	v=spf1 ip4:40.115.24.223 include:spf.protection.outlook.com include:outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.c-mu.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:dmarc@c-mu.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 2026-10-10 16:41:01

www	93.191.158.22 (AS48854) (address records, no CNAME)
www vs bare domain	Same network c-mu.dk: 93.191.158.22 (AS48854) www.c-mu.dk: 93.191.158.22 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

4 records 107ms

Service / Owner	Type	Cert association
SMTP _25._tcp.cmu-dk0c.k-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	C1AD7778796D20BCA65C889A26550211…
SMTP _25._tcp.cmu-dk0c.k-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	54883CC5F1849331E6BF5002C3129D20…
SMTP _25._tcp.cmu-dk0c.k-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	EA7A25255D111FC3CE4CB8FABE3ADF9C…
SMTP _25._tcp.cmu-dk0c.k-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	803F7447CC75B208DBCA042346F5D8DF…

🔐 DNSSEC#

104ms

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

🏷️ SOA#

44ms

Field	Value
Serial	2025022109
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-16 00:19:12

Field	Value
Registrar	DANDOMAIN A/S
Registered	2012-02-21
Expires	2027-02-28 (132d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

84ms

47ms

71ms

AAAA

68ms

TXT

179ms

CAA

35ms

HTTPS

72ms

TLSA

107ms

SOA

44ms

MTA-STS

95ms

DNSSEC

104ms

SRV

96ms

Total

1001ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 03:08:26 shown	1001ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-02 00:23:31	819ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 18:49:00	559ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 18:40:28	936ms	2 NS 1 A 1 MX	🔒 Secure