net4us.dk

📜 Historical scan 2026-10-09 09:58:46 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

net4us.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 9.205.16.211 is hosted by Microsoft Corporation (AS8075) in Denmark. Mail is handled by odie.holmnet.dk, mail.holmnet.dk. The zone is DNSSEC-signed and validates, publishes a 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#

2 records 42ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 38ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
9.205.16.211	600s	odie.holmnet.dk	AS8075	Microsoft Corporation	9.205.0.0/16	🇩🇰 Denmark	Copenhagen

📧 MX Records#

2 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	odie.holmnet.dk	9.205.16.211	odie.holmnet.dk	AS8075 Microsoft Corporation
20	600s	mail.holmnet.dk	9.205.16.211	odie.holmnet.dk	AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	net4us.dk → 9.205.16.211

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 160ms

TXT Record
google-site-verification=JwFwgj0J0h_buqOJ9pYizY0_3FPUJW2-yQqZpvgv5c0
v=spf1 mx include:holmnet.dk ~all

✉️ SPF#

Policy	Record (net4us.dk)
~all (soft fail)	v=spf1 mx include:holmnet.dk ~all

📨 DMARC#

Policy	Record (_dmarc.net4us.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:peter@net4us.dk;

📬 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 10:23:07

www CNAME	odie.holmnet.dk (all on holmnet.dk) → 9.205.16.211 (AS8075)
www vs bare domain	Same network net4us.dk: 9.205.16.211 (AS8075) www.net4us.dk: 9.205.16.211 (AS8075)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
mail	—	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: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

119ms

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

🏷️ SOA#

50ms

Field	Value
Serial	2026090801
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

42ms

38ms

39ms

AAAA

52ms

TXT

160ms

CAA

33ms

HTTPS

35ms

TLSA

119ms

SOA

50ms

MTA-STS

52ms

DNSSEC

119ms

SRV

54ms

Total

850ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-10 10:23:07	647ms	2 NS 1 A 2 MX	🔒 Secure
2026-10-09 09:58:46 shown	850ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-13 08:06:09	1105ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-10 22:47:55	719ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-07 08:19:07	1617ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-23 00:56:54	8645ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-20 22:36:54	791ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-19 07:35:53	16805ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-17 04:04:18	1049ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-12 09:07:13	972ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-22 18:35:19	1225ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-17 20:33:48	908ms	2 NS 1 A 2 MX	🔒 Secure