nexfirewall.dk

📜 Historical scan 2026-09-27 08:00:28 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

nexfirewall.dk is a .dk domain served by 2 nameservers (ns.web4u.cz, ns2.web4u.cz). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.91.86.14 is hosted by Web4U s.r.o. (AS39790) in Czechia. Mail is handled by mx1.mailchannels.net, mx2.mailchannels.net. 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 52ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.web4u.cz	185.14.224.241 2001:1568:fd::241	ns.web4u.cz ns.web4u.cz	AS39790 Web4U s.r.o. AS39790 Web4U s.r.o.
ns2.web4u.cz	2a02:a40:100:28ff::12 85.207.53.12	ns2.web4u.cz ns2.web4u.cz	AS25248 RADIOKOMUNIKACE a.s. AS25248 RADIOKOMUNIKACE a.s.

🌍 A Records#

1 records 50ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
81.91.86.14	900s	php7.web4u.cz	AS39790	Web4U s.r.o.	81.91.80.0/20	🇨🇿 Czechia	—

📧 MX Records#

2 records 52ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	900s	mx1.mailchannels.net	54.187.177.89	ec2-54-187-177-89.us-west-2.compute.amazonaws.com	AS16509 Amazon.com, Inc.
10	900s	mx2.mailchannels.net	54.187.177.89	ec2-54-187-177-89.us-west-2.compute.amazonaws.com	AS16509 Amazon.com, Inc.

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	81.91.86.14
🔶 Autoconfig	81.91.86.14

🔷 AAAA Records (IPv6)#

1 records 51ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2001:1568::14	900s	php7.web4u.cz	AS39790	Web4U s.r.o.	2001:1568:0:0:0:0:0:0/32	🇨🇿 Czechia	—

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

📝

No TXT records found

✉️ 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 03:59:49

www	81.91.86.14 2001:1568::14 (AS39790) (address records, no CNAME)
www vs bare domain	Same network nexfirewall.dk: 81.91.86.14 2001:1568::14 (AS39790) www.nexfirewall.dk: 81.91.86.14 2001:1568::14 (AS39790)
Wildcard	Yes: any name under the zone resolves

🔗 TLSA / DANE#

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

🔐 DNSSEC#

2053ms

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	2026052701
Primary NS (MNAME)	ns.web4u.cz
Responsible (RNAME)	admin@web4u.cz
Refresh	10800s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	14400s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

52ms

50ms

52ms

AAAA

51ms

TXT

368ms

CAA

55ms

HTTPS

78ms

TLSA

318ms

SOA

0ms

MTA-STS

105ms

DNSSEC

2053ms

SRV

114ms

Total

2921ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 03:59:49	2161ms	2 NS 1 A 2 MX	🔓 Insecure
2026-10-01 04:50:21	1198ms	2 NS 1 A 2 MX	🔓 Insecure
2026-09-27 08:00:28 shown	2921ms	2 NS 1 A 2 MX	🔓 Insecure
2026-06-24 03:33:59	1466ms	2 NS 1 A 2 MX	🔓 Insecure
2026-06-19 04:36:11	1870ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 13:15:26	2619ms	0 NS 0 A 0 MX	❓ Unknown