systemguide.dk

📜 Historical scan 2026-06-25 14:10:57 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

systemguide.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 15 April 2026 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.198.79.1 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by mx1.improvmx.com, mx2.improvmx.com. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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#

3 records 276ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 271ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
216.198.79.1	3600s	—	AS16509	Amazon.com, Inc.	216.198.79.0/24	🇺🇸 United States	—

📧 MX Records#

2 records 282ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1.improvmx.com	13.37.195.136 15.236.236.160 2a05:d012:412:e201:88aa:e7b9:7a43:12d7 2a05:d012:412:e202:f36:2c1f:1a49:d38a 2a05:d012:412:e203:373a:f51a:4a85:1d25 35.181.18.45	ec2-13-37-195-136.eu-west-3.compute.amazonaws.com ec2-15-236-236-160.eu-west-3.compute.amazonaws.com — — — ec2-35-181-18-45.eu-west-3.compute.amazonaws.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
20	3600s	mx2.improvmx.com	13.36.107.63 13.36.222.39 15.236.61.92 2a05:d012:412:e201:1f6e:f6e4:8fd7:4678 2a05:d012:412:e202:e81e:cc44:3b53:8a3d 2a05:d012:412:e203:7e33:3d9c:28d7:ee20	ec2-13-36-107-63.eu-west-3.compute.amazonaws.com ec2-13-36-222-39.eu-west-3.compute.amazonaws.com ec2-15-236-61-92.eu-west-3.compute.amazonaws.com — — —	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 835ms

TXT Record
google-site-verification=BxozoiZVcL2tdPoGl_8awcFsxWLgyDNWY2Gbxv9AGt8
v=spf1 include:spf.improvmx.com ~all

✉️ SPF#

Policy	Record (systemguide.dk)
~all (soft fail)	v=spf1 include:spf.improvmx.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 2026-10-12 23:06:58

www CNAME	0f95ce362d5dfe6f.vercel-dns-017.com (all on vercel-dns-017.com) → 216.150.1.1 216.150.16.1 (AS16509)
www vs bare domain	Same network systemguide.dk: 216.198.79.1 (AS16509) www.systemguide.dk: 216.150.1.1 216.150.16.1 (AS16509)
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 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#

658ms

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

🏷️ SOA#

250ms

Field	Value
Serial	2026050100
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-04 02:17:22

Field	Value
Registrar	Simply.com A/S
Registered	2026-04-15
Expires	2027-04-14 (168d)

📋 WHOIS#

⏱️ Lookup Timing#

276ms

271ms

282ms

AAAA

276ms

TXT

835ms

CAA

257ms

HTTPS

233ms

TLSA

133ms

SOA

250ms

MTA-STS

276ms

DNSSEC

658ms

SRV

259ms

Total

2608ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 23:06:58	2949ms	3 NS 1 A 2 MX	🔒 Secure
2026-10-07 19:19:59	427ms	3 NS 1 A 2 MX	🔒 Secure
2026-10-04 01:38:41	447ms	3 NS 1 A 2 MX	🔒 Secure
2026-10-03 01:37:49	1234ms	3 NS 1 A 2 MX	🔒 Secure
2026-09-30 01:11:56	501ms	3 NS 1 A 2 MX	🔒 Secure
2026-07-22 01:24:40	17460ms	3 NS 1 A 2 MX	🔒 Secure
2026-06-29 17:06:14	978ms	3 NS 1 A 2 MX	🔒 Secure
2026-06-25 14:10:57 shown	2608ms	3 NS 1 A 2 MX	🔒 Secure
2026-06-18 09:21:27	1218ms	3 NS 1 A 2 MX	🔒 Secure