n2b.dk

📜 Historical scan 2026-09-29 22:17:23 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

n2b.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 20 October 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 89.23.236.21 is hosted by Fiberby ApS (AS42541) in Denmark. Mail is handled by mx09.posthuset.nu, mx11.posthuset.nu. 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#

2 records 28ms

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 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
89.23.236.21	600s	89-23-236-21.ip4.fiberby.net	AS42541	Fiberby ApS	89.23.224.0/19	🇩🇰 Denmark	Copenhagen

📧 MX Records#

2 records 31ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
9	43200s	mx09.posthuset.nu	185.21.40.130	vm1220.enterprisecloud.nu	AS48854 team.blue Denmark A/S
11	43200s	mx11.posthuset.nu	185.21.40.130	vm1220.enterprisecloud.nu	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	n2b.dk → 89.23.236.21
🔶 Autoconfig	n2b.dk → 89.23.236.21

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 148ms

TXT Record
Posthuset

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 2026-10-08 01:54:52

www CNAME	n2b.dk (all on n2b.dk) → 89.23.236.21 (AS42541)
www vs bare domain	Same network n2b.dk: 89.23.236.21 (AS42541) www.n2b.dk: 89.23.236.21 (AS42541)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.n2b.dk	n2b.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

54ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026092301
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-09 04:11:57

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2009-10-20
Expires	2026-10-31 (14d)

📋 WHOIS#

⏱️ Lookup Timing#

28ms

34ms

31ms

AAAA

27ms

TXT

148ms

CAA

34ms

HTTPS

33ms

TLSA

107ms

SOA

0ms

MTA-STS

52ms

DNSSEC

54ms

SRV

53ms

Total

610ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 22:37:11	4544ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-29 22:17:23 shown	610ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-28 02:19:20	1527ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-24 01:56:50	755ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-27 05:16:55	644ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-27 07:20:01	760ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-17 20:01:22	919ms	2 NS 1 A 2 MX	🔒 Secure