cd-k.dk

📜 Historical scan 2026-09-26 21:52:55 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

cd-k.dk is a .dk domain served by 2 nameservers (fonzie.ns.cloudflare.com, linda.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.20.14 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by cdk-dk0e.mail.protection.outlook.com, ms19352414.msv1.invalid. The zone is DNSSEC-signed and validates, 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 40ms

Nameserver	IP addresses	PTR	ASN / ISP
fonzie.ns.cloudflare.com	108.162.195.70 162.159.44.70 172.64.35.70 2606:4700:58::a29f:2c46 2803:f800:50::6ca2:c346 2a06:98c1:50::ac40:2346	fonzie.ns.cloudflare.com fonzie.ns.cloudflare.com fonzie.ns.cloudflare.com fonzie.ns.cloudflare.com fonzie.ns.cloudflare.com fonzie.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
linda.ns.cloudflare.com	108.162.192.250 172.64.32.250 173.245.58.250 2606:4700:50::adf5:3afa 2803:f800:50::6ca2:c0fa 2a06:98c1:50::ac40:20fa	linda.ns.cloudflare.com linda.ns.cloudflare.com linda.ns.cloudflare.com linda.ns.cloudflare.com linda.ns.cloudflare.com linda.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 41ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.20.14	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.190.205	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

2 records 37ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	cdk-dk0e.mail.protection.outlook.com	2a01:111:f403:ca04::a 2a01:111:f403:ca21::10 2a01:111:f403:ca21::c 2a01:111:f403:ca38::a 52.101.103.143 52.101.181.153 52.101.68.21 52.101.68.27	mail-du0pr03cu00102.inbound.protection.outlook.com mail-matpr05cu00100.inbound.protection.outlook.com mail-matpr04cu00204.inbound.protection.outlook.com mail-wa4pr05cu00102.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-wa4pr04cu00101.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-db7pr03cu00503.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
32767	3600s	ms19352414.msv1.invalid	—	—	—

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)#

2 records 40ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::ac43:becd	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3033::6815:140e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 39ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.20.14,172.67.190.205 ech=AEX+DQBBGQAgACBrJ96InNwWTYSATlTsB1MQFF1GV214wknOgnJRMG9JLgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:becd,2606:4700:3033::6815:140e

🔌 SRV Records#

1 records 62ms

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

📝 TXT Records#

5 records 165ms

TXT Record
google-site-verification=6IUD2Z1lh50EB6hbOuM9h5Rn0yawbLZM193mLZYG6qU
google-site-verification=XCD3cVdBmR9FcnvcSJAkcCV1G9yXcRhr3V8NKZow614
MS=ms19352414
MS=ms30782987
v=spf1 ipv4:65.108.205.18 ipv6:2a01:4f9:1a:a108:abcd::1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (cd-k.dk)
-all (hard fail)	v=spf1 ipv4:65.108.205.18 ipv6:2a01:4f9:1a:a108:abcd::1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.cd-k.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:e3b66cfc72b142d88af5486a3e2daa47@dmarc-reports.cloudflare.net;

📬 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 2026-10-10 11:56:40

www	104.21.20.14 172.67.190.205 2606:4700:3031::ac43:becd 2606:4700:3033::6815:140e (AS13335) (address records, no CNAME)
www vs bare domain	Same network cd-k.dk: 104.21.20.14 172.67.190.205 2606:4700:3031::ac43:becd 2606:4700:3033::6815:140e (AS13335) www.cd-k.dk: 104.21.20.14 172.67.190.205 2606:4700:3031::ac43:becd 2606:4700:3033::6815:140e (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-cdk-dk0e._domainkey.christianskoreskole.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: 1/10 · policy: -all

error Unknown mechanism "ipv4:65.108.205.18": receivers treat the record as a permanent error
error Unknown mechanism "ipv6:2a01:4f9:1a:a108:abcd::1": receivers treat the record as a permanent error

🔗 TLSA / DANE#

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

🔐 DNSSEC#

113ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415928267
Primary NS (MNAME)	fonzie.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

40ms

41ms

37ms

AAAA

40ms

TXT

165ms

CAA

33ms

HTTPS

39ms

TLSA

601ms

SOA

0ms

MTA-STS

66ms

DNSSEC

113ms

SRV

62ms

Total

1327ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 00:56:34	936ms	2 NS 2 A 2 MX	🔒 Secure
2026-09-26 21:52:55 shown	1327ms	2 NS 2 A 2 MX	🔒 Secure
2026-09-21 10:51:45	1736ms	2 NS 2 A 2 MX	🔒 Secure
2026-09-07 08:48:43	1777ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-26 02:34:41	9868ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-23 06:42:11	1465ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-22 06:34:37	10918ms	2 NS 2 A 2 MX	🔒 Secure
2026-08-10 21:46:45	2501ms	2 NS 2 A 2 MX	🔒 Secure
2026-07-17 08:08:48	9201ms	2 NS 2 A 2 MX	🔒 Secure
2026-07-15 20:43:44	1774ms	2 NS 2 A 2 MX	🔒 Secure
2026-06-24 04:43:41	2290ms	2 NS 2 A 2 MX	🔒 Secure
2026-06-21 07:48:26	1701ms	2 NS 2 A 2 MX	🔒 Secure
2026-06-21 04:34:19	1012ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 19:55:25	856ms	2 NS 2 A 2 MX	🔒 Secure