`mx.flexdanmark.dk`

DNSSEC	⚠️ Not signed
A	91.221.143.35^{🇩🇰 NJTS91.221.142.0/23 Nordjylands Trafikselskab A/S}
		PTR	`mx.flexdanmark.dk`
		PTR	`smtp.flexdanmark.dk`

`flexdanmark.dk`

	DNSSEC	⚠️ Not signed
	A	91.221.143.80^{🇩🇰 NJTS91.221.142.0/23 Nordjylands Trafikselskab A/S}
	NS	`ns1.simply.com` ⭐
	NS	`ns2.simply.com`
	NS	`ns3.simply.com`
	NS	`ns4.simply.com`
	MX	`frontmta.hostedsepo.dk` ⭐
	TXT	`MS=ms42642006`
	TXT	`v=spf1 mx a include:o._spf.hostedsepo.dk ip4:91.221.142.0/23 include:stspg-cu...`
	TXT	`openai-domain-verification=dv-hRBpynfT0TaFjZzdnytc4SvW`
	TXT	`google-site-verification=Tg2J_ujSt-lm5d2Alb80p--NmY5SYve3-ZEeQfGIp8s`
	TXT	`f77wzslf96l6dnyqs5k9hrgk2wdkv0wq`
	TXT	`status-page-domain-verification=snp3w957wv90`
	SOA	`ns1.simply.com`hostmaster@simply.com 2026-07-20 #29

🔒 HSTS Preload (+subdomains)

PTR for

35.143.221.91.in-addr.arpa

Previously MX for

flexdanmark.dk

Same first word

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DNS History

2 records (1 active, 1 former)

○A91.221.143.2432015-08-05 → 2015-08-05 · 3 obs

● 2015-08-05 14:48:40
○ 2015-11-27 12:27:38
○ 2026-07-31 12:38:16

●A91.221.143.352015-11-27 → 2026-07-31 · 3 obs

○ 2015-08-05 14:48:40
● 2015-11-27 12:27:38
● 2026-07-31 12:38:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...	-
flexdanmark.dk	ns1.simply.com, ns2.simply.com, ns3.simply.com, ns4.simply.com	-

✅ Authoritative Response

Server:91.197.248.79

NS records: ns1.simply.com, ns2.simply.com, ns3.simply.com, ns4.simply.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flexdanmark.dk (unsigned zone)

⏱️ Timing

Total: 3666ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.221.143.35`

Analysis

IP Addresses

mx.flexdanmark.dk points to a single IP number: 91.221.143.35.

mail.(0x74697473)am.dk, mx.flexdrift.dk and smtp.flexdanmark.dk are examples of other host names that share IP numbers with mx.flexdanmark.dk.

mx.flexdanmark.dk - dns.ninja