centerasecurity.dk

📜 Historical scan 2026-07-09 21:58:22 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

centerasecurity.dk is a .dk domain served by 2 nameservers (curt.ns.cloudflare.com, hera.ns.cloudflare.com). It was registered on 7 February 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.85.246 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by centerasecurity-dk.mail.protection.outlook.com. 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 67ms

Nameserver	IP addresses	PTR	ASN / ISP
curt.ns.cloudflare.com	108.162.193.94 172.64.33.94 173.245.59.94 2606:4700:58::adf5:3b5e 2803:f800:50::6ca2:c15e 2a06:98c1:50::ac40:215e	curt.ns.cloudflare.com curt.ns.cloudflare.com curt.ns.cloudflare.com curt.ns.cloudflare.com curt.ns.cloudflare.com curt.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
hera.ns.cloudflare.com	108.162.192.162 172.64.32.162 173.245.58.162 2606:4700:50::adf5:3aa2 2803:f800:50::6ca2:c0a2 2a06:98c1:50::ac40:20a2	hera.ns.cloudflare.com hera.ns.cloudflare.com hera.ns.cloudflare.com hera.ns.cloudflare.com hera.ns.cloudflare.com hera.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 60ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.85.246	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.212.250	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 63ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	centerasecurity-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::4 2a01:111:f403:ca09::2 2a01:111:f403:ca09::d 52.101.68.15 52.101.68.8 52.101.73.12 52.101.73.26	mail-du2pr03cu00102.inbound.protection.outlook.com mail-db4pr02cu00204.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-du0pr03cu00100.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as9pr05cu01302.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 → 40.98.16.63

🔷 AAAA Records (IPv6)#

2 records 58ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:d4fa	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:55f6	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 65ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.85.246,172.67.212.250 ech=AEX+DQBBfQAgACCCyRU/I8Cz8dI5qHkXv7Fdl63UWQltp8VwJPCScQfwMwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:d4fa,2606:4700:3036::6815:55f6

🔌 SRV Records#

1 records 110ms

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

📝 TXT Records#

2 records 250ms

TXT Record
MS=ms65998022
v=spf1 a:outbound.centerasecurity.dk include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (centerasecurity.dk)
-all (hard fail)	v=spf1 a:outbound.centerasecurity.dk include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.centerasecurity.dk)
p=reject	v=DMARC1; p=reject;

📬 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 2026-10-17 14:24:47

www	104.21.85.246 172.67.212.250 2606:4700:3030::ac43:d4fa 2606:4700:3036::6815:55f6 (AS13335) (address records, no CNAME)
www vs bare domain	Same network centerasecurity.dk: 104.21.85.246 172.67.212.250 2606:4700:3030::ac43:d4fa 2606:4700:3036::6815:55f6 (AS13335) www.centerasecurity.dk: 104.21.85.246 172.67.212.250 2606:4700:3030::ac43:d4fa 2606:4700:3036::6815:55f6 (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-centerasecurity-dk._domainkey.cetacyberdefense.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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

167ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2409092662
Primary NS (MNAME)	curt.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-12 07:14:10

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2020-02-07
Expires	2029-02-28 (864d)

🔗 Same registrant#

4 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).

Domain	Registrar
centera.dk	Punktum dk A/S (direct)
cetacyberdefence.dk	Punktum dk A/S (direct)
cetacyberdefense.dk	Punktum dk A/S (direct)
spf-protect.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

67ms

60ms

63ms

AAAA

58ms

TXT

250ms

CAA

44ms

HTTPS

65ms

TLSA

16034ms

SOA

0ms

MTA-STS

45ms

DNSSEC

167ms

SRV

110ms

Total

17231ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-17 14:24:47	1269ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-14 11:29:58	3699ms	2 NS 2 A 1 MX	🔒 Secure
2026-10-12 06:59:28	1507ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-26 23:00:27	1499ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-26 20:58:08	1073ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-25 20:22:18	1050ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-20 21:54:54	1497ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-27 13:25:13	1167ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-26 13:04:26	10223ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-18 15:35:19	2576ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-14 06:12:25	4670ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-06 07:58:06	2304ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-01 05:43:57	1584ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-09 21:58:22 shown	17231ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-21 05:18:47	1927ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-16 20:05:33	752ms	2 NS 2 A 1 MX	🔒 Secure