strongholdgroup.dk

Records from scan: 2026-10-21 11:20:26 · 581ms total · last checked 2026-10-24 07:27 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

strongholdgroup.dk is a .dk domain served by 4 nameservers (ephemera.nmugroup.se, origo.nmugroup.com, unit.nmugroup.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.183.80.13 is hosted by Nordisk Media Utveckling AB (AS204074) in Sweden. Mail is handled by .. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

4 records 41ms

Nameserver	IP addresses	PTR	ASN / ISP
ephemera.nmugroup.se	2a02:80:3ffe::28 85.30.129.28	ephemera.nmugroup.se ephemera.nmugroup.se	AS34244 Teleservice Bredband Skane AB AS34244 Teleservice Bredband Skane AB
origo.nmugroup.com	193.183.80.4 2001:67c:1b2c::4	origo.nmugroup.com origo.nmugroup.com	AS204074 Nordisk Media Utveckling AB AS204074 Nordisk Media Utveckling AB
unit.nmugroup.com	2001:4db8:e004::2 217.10.116.210	unit.nmugroup.com unit.nmugroup.com	AS35706 Net at Once Sweden AB AS35706 Net at Once Sweden AB
vertex.nmugroup.se	195.246.120.244 2a02:752:0:18::18	vertex.nmugroup.se vertex.nmugroup.se	AS42708 Glesys AB AS42708 Glesys AB

🌍 A Records#

1 records 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.183.80.13	3600s	redirect.nmugroup.com	AS204074	Nordisk Media Utveckling AB	193.183.80.0/24	🇸🇪 Sweden	—

📧 MX Records#

1 records 26ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	. Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)#

1 records 29ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2001:67c:1b2c::4:1	3600s	redirect.nmugroup.com	AS204074	Nordisk Media Utveckling AB	2001:67c:1b2c:0:0:0:0:0/48	🇸🇪 Sweden	—

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 240ms

TXT Record
v=spf1 -all

✉️ SPF#

Policy	Record (strongholdgroup.dk)
-all (hard fail)	v=spf1 -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#

checked 2026-10-21 11:20:26

www CNAME	redirect.nmugroup.com (all on nmugroup.com) → 193.183.80.13 2001:67c:1b2c::4:1 (AS204074)
www vs bare domain	Same network strongholdgroup.dk: 193.183.80.13 2001:67c:1b2c::4:1 (AS204074) www.strongholdgroup.dk: 193.183.80.13 2001:67c:1b2c::4:1 (AS204074)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

100ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

47ms

Field	Value
Serial	2022080900
Primary NS (MNAME)	origo.nmugroup.com
Responsible (RNAME)	dns@nmugroup.com
Refresh	86400s
Retry	7200s
Expire	3600000s
Minimum (neg-cache TTL)	3600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

41ms

28ms

26ms

AAAA

29ms

TXT

240ms

CAA

38ms

HTTPS

41ms

TLSA

64ms

SOA

47ms

MTA-STS

45ms

DNSSEC

100ms

SRV

54ms

Total

581ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-21 11:20:26 shown	581ms	4 NS 1 A 1 MX	🔓 Insecure
2026-10-09 12:05:34	753ms	4 NS 1 A 1 MX	🔓 Insecure
2026-09-30 05:04:19	804ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-29 05:31:35	774ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-28 00:23:46	964ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-21 11:56:27	808ms	4 NS 1 A 1 MX	🔓 Insecure
2026-06-20 19:47:54	1125ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-18 04:20:44	1125ms	4 NS 1 A 0 MX	🔓 Insecure