mcu.dk

📜 Historical scan 2026-08-22 15:15:11 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

mcu.dk is a .dk domain served by 2 nameservers (jean.ns.cloudflare.com, tony.ns.cloudflare.com). It was registered on 24 February 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.79.159 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mcu-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 275ms

Nameserver	IP addresses	PTR	ASN / ISP
jean.ns.cloudflare.com	108.162.192.121 172.64.32.121 173.245.58.121 2606:4700:50::adf5:3a79 2803:f800:50::6ca2:c079 2a06:98c1:50::ac40:2079	jean.ns.cloudflare.com jean.ns.cloudflare.com jean.ns.cloudflare.com jean.ns.cloudflare.com jean.ns.cloudflare.com jean.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
tony.ns.cloudflare.com	108.162.193.240 172.64.33.240 173.245.59.240 2606:4700:58::adf5:3bf0 2803:f800:50::6ca2:c1f0 2a06:98c1:50::ac40:21f0	tony.ns.cloudflare.com tony.ns.cloudflare.com tony.ns.cloudflare.com tony.ns.cloudflare.com tony.ns.cloudflare.com tony.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 284ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.79.159	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.146.121	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 318ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	mcu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::10 2a01:111:f403:ca04::4 2a01:111:f403:ca04::d 52.101.68.12 52.101.68.39 52.101.73.1 52.101.73.16	mail-db7pr03cu00401.inbound.protection.outlook.com mail-dbapr03cu00100.inbound.protection.outlook.com mail-db4pr02cu00204.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-as2pr05cu00100.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)#

2 records 300ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:4f9f	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:9279	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 299ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.79.159,172.67.146.121 ech=AEX+DQBBCgAgACBjXV+bFnJQpvAhnLIm5w8VW9g7wJVqcpHCqBYjHBj1DQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:4f9f,2606:4700:3037::ac43:9279

🔌 SRV Records#

1 records 320ms

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

📝 TXT Records#

2 records 728ms

TXT Record
_globalsign-domain-verification=t9ducB9AB9SXTvSxn9SgW7K6OH_fwRyXTCjjiC5C0C
v=spf1 include:spf.comendosystems.com include:spf.protection.outlook.com include:uxmail.io ip4:2.109.66.250 ip4:52.166.129.0 a mx -all

✉️ SPF#

Policy	Record (mcu.dk)
-all (hard fail)	v=spf1 include:spf.comendosystems.com include:spf.protection.outlook.com include:uxmail.io ip4:2.109.66.250 ip4:52.166.129.0 a mx -all

📨 DMARC#

Policy	Record (_dmarc.mcu.dk)
p=none (monitor only)	v=DMARC1; p=none; pct=100; rua=mailto:re+g357wgyu0wt@dmarc.postmarkapp.com; sp=none; aspf=r;

📬 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 2026-10-09 13:48:25

www	104.21.79.159 172.67.146.121 2606:4700:3031::6815:4f9f 2606:4700:3037::ac43:9279 (AS13335) (address records, no CNAME)
www vs bare domain	Same network mcu.dk: 104.21.79.159 172.67.146.121 2606:4700:3031::6815:4f9f 2606:4700:3037::ac43:9279 (AS13335) www.mcu.dk: 104.21.79.159 172.67.146.121 2606:4700:3031::6815:4f9f 2606:4700:3037::ac43:9279 (AS13335)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-mcu-dk._domainkey.mmvisiondk.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: 7/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.mcu.dk	6XwwmTEOEC7UkPrg4Oijx_ghaYhdxcXbCJNPci9eJtk
TXT	_acme-challenge.mcu.dk	B4uqqJQqCRlSVXpN5IylZC6Miv7SjVA9RRvQAIyvHGs

🔗 TLSA / DANE#

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

🔐 DNSSEC#

500ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2412832354
Primary NS (MNAME)	jean.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-05 03:48:12

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2006-02-24
Expires	2027-02-28 (126d)

📋 WHOIS#

⏱️ Lookup Timing#

275ms

284ms

318ms

AAAA

300ms

TXT

728ms

CAA

281ms

HTTPS

299ms

TLSA

1247ms

SOA

0ms

MTA-STS

344ms

DNSSEC

500ms

SRV

320ms

Total

11186ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 03:36:28	1280ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-27 02:17:03	2258ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 02:07:09	1492ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-24 01:10:01	1341ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-18 07:56:18	2405ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-11 06:20:44	2205ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-04 06:11:42	1473ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-26 18:31:37	1344ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-24 17:53:36	2373ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-22 15:15:11 shown	11186ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-20 15:07:26	8698ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-09 17:07:13	4111ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-06 10:09:44	3786ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-26 16:13:32	1678ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-26 03:18:36	1006ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-24 01:33:49	968ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-20 17:47:57	2888ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 11:43:45	2321ms	2 NS 2 A 1 MX	🔓 Insecure