crsystem.dk

📜 Historical scan 2026-08-26 23:27:15 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

crsystem.dk is a .dk domain served by 2 nameservers (alex.ns.cloudflare.com, ingrid.ns.cloudflare.com). It was registered on 19 August 2026 (WHOIS) and first appeared in the .dk zone on 20 August 2026. Its website address 104.21.51.141 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by crsystem-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no 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 34ms

Nameserver	IP addresses	PTR	ASN / ISP
alex.ns.cloudflare.com	108.162.193.100 172.64.33.100 173.245.59.100 2606:4700:58::adf5:3b64 2803:f800:50::6ca2:c164 2a06:98c1:50::ac40:2164	alex.ns.cloudflare.com alex.ns.cloudflare.com alex.ns.cloudflare.com alex.ns.cloudflare.com alex.ns.cloudflare.com alex.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
ingrid.ns.cloudflare.com	108.162.192.165 172.64.32.165 173.245.58.165 2606:4700:50::adf5:3aa5 2803:f800:50::6ca2:c0a5 2a06:98c1:50::ac40:20a5	ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.ns.cloudflare.com ingrid.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 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.51.141	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.181.42	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 26ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	crsystem-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca09::b 2a01:111:f403:ca09::c 2a01:111:f403:ca09::f 52.101.103.140 52.101.68.12 52.101.73.15 52.101.73.28	mail-db7pr03cu00401.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-as8pr05cu00304.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am7pr05cu00204.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 → 40.104.116.56
🔶 Autoconfig	172.67.181.42

🔷 AAAA Records (IPv6)#

2 records 26ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::6815:338d	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:b52a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 33ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.51.141,172.67.181.42 ech=AEX+DQBBHQAgACCVKH0tapWKW1aDmmItLE41khRkYqidlTUBnmJguY6hAgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:338d,2606:4700:3037::ac43:b52a

📝 TXT Records#

2 records 164ms

TXT Record
MS=ms51825961
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-09-29 19:52:55

www	Address record (no CNAME)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-crsystem-dk._domainkey.crelectricdk.d-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-crsystem-dk._domainkey.crelectricdk.d-v1.dkim.mail.microsoft	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

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

103ms

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	2413222703
Primary NS (MNAME)	alex.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-08 01:42:37

Field	Value
Registrar	DANDOMAIN A/S
Registered	2026-08-19
Expires	2027-08-18 (304d)

📋 WHOIS#

⏱️ Lookup Timing#

34ms

30ms

26ms

AAAA

26ms

TXT

164ms

CAA

28ms

HTTPS

33ms

TLSA

181ms

SOA

0ms

MTA-STS

48ms

DNSSEC

103ms

SRV

82ms

Total

778ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-29 19:52:55	1085ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 22:59:01	905ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-12 10:57:17	1371ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-29 02:01:23	2918ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-26 23:27:15 shown	778ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-22 09:51:50	1266ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-21 09:40:20	3703ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-20 08:50:36	721ms	2 NS 1 A 0 MX	🔓 Insecure