`mail.rtgonline.dk`

DNSSEC	⚠️ Not signed
A	185.21.41.217^{🇩🇰 team-blue-denmark185.21.40.0/22 ZITCOM A/S}
		PTR	`director1.mf.curanet.dk`

`rtgonline.dk`

	DNSSEC	🔒 Signed (DS record present)
	A	93.191.155.240^{🇩🇰 team-blue-denmark93.191.152.0/21 ZITCOM A/S}
	NS	`ns1.curanet.dk` ⭐
	NS	`ns2.curanet.dk`
	MX	`mx1.onlinemail.io` ⭐
	MX	`mx2.onlinemail.io`⁽²⁰⁾
	TXT	`v=spf1 include:spf.onlinemail.io ?all`
	SOA	`ns1.curanet.dk`hostmaster@curanet.dk 2024-03-04 #1

Previously MX for

rtgonline.dk

Same first word

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DNS History

1 record (1 active, 0 former)

●A185.21.41.2172017-02-12 → 2026-04-22 · 2 obs

● 2017-02-12 10:40:48
● 2026-04-22 12:33:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	l.nic.dk, h.nic.dk, b.nic.dk, c.nic.dk...	-
rtgonline.dk	ns1.curanet.dk, ns2.curanet.dk	-

✅ Authoritative Response

Server:91.197.248.75

NS records: ns1.curanet.dk, ns2.curanet.dk

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1009ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.21.41.217`

Analysis

IP Addresses

mail.rtgonline.dk points to a single IP address: 185.21.41.217.

Other host names such as mail.podeplast.dk, mail.mekanet.dk, mail.sundhedens-hus.dk, mail.viessmann-garanti.dk and mail.sandberg.dk share IPs with mail.rtgonline.dk.

mail.rtgonline.dk - robtex.com