mail.rtf.dk - dns.ninja

`mail.rtf.dk`

CNAME	`rtf.dk`
DNSSEC	🔒 Signed (DS record present)
A	185.31.76.135^{🇩🇰 DLX-AS185.31.76.0/22}
		PTR	`prod35.magentohotel.dk`
NS	`ns01.one.com` ⭐
		A	2001:67c:28cc::10^{ONECOM-INFRA2001:67c:28cc::/48}
			PTR	`ns01.one.com`
		A	195.206.121.10^{ONECOM-INFRA195.206.121.0/24}
			PTR	`ns01.one.com`
NS	`ns02.one.com`
		A	2001:67c:3c0::10^{🇩🇰 ONECOM2001:67c:3c0::/48}
			PTR	`ns02.one.com`
		A	185.10.11.10^{ONECOM185.10.11.0/24}
			PTR	`ns02.one.com`
MX	`rtf-dk.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::1^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::6^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00406.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::5^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am1pr04cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::c^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as8pr05cu00304.inbound.protection.outlook.com`
		A	52.101.68.8^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-du0pr03cu00100.inbound.protection.outlook.com`
		A	52.101.68.12^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	52.101.68.15^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db6pr03cu00107.inbound.protection.outlook.com`
		A	52.101.73.2^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr07cu00302.inbound.protection.outlook.com`
TXT	`MS=ms38741212`
TXT	`v=spf1 mx a ip4:2.109.51.166 include:spf-westeu.emailsignatures365.com includ...`
SOA	`ns01.one.com`hostmaster@one.com 2026-06-30 #1

`rtf.dk`

	DNSSEC	🔒 Signed (DS record present)
	A	185.31.76.135^{🇩🇰 DLX-AS185.31.76.0/22}
	NS	`ns01.one.com` ⭐
	NS	`ns02.one.com`
	MX	`rtf-dk.mail.protection.outlook.com` ⭐
	TXT	`MS=ms38741212`
	TXT	`v=spf1 mx a ip4:2.109.51.166 include:spf-westeu.emailsignatures365.com includ...`
	SOA	`ns01.one.com`hostmaster@one.com 2026-06-30 #1

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DNS History

2 records (1 active, 1 former)

○A31.193.235.942015-08-17 → 2016-07-27 · 4 obs

● 2015-08-17 17:23:44
● 2016-07-27 04:40:34
○ 2026-06-19 02:18:04
○ 2026-07-11 03:56:26

●CNAMErtf.dk2026-06-19 → 2026-07-11 · 2 obs

● 2026-06-19 02:18:04
● 2026-07-11 03:56:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...	-
rtf.dk	ns01.one.com, ns02.one.com	-

✅ Authoritative Response

Server:185.10.11.10

NS records: ns01.one.com, ns02.one.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 994ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`rtf.dk`

Analysis

IP Addresses

mail.rtf.dk directs to one IP number, which is 185.31.76.135.

There are other host names — rtf.dk among them — that share IP numbers with mail.rtf.dk.

Name Servers

DNS delegation for mail.rtf.dk points to two name servers: ns01.one.com and ns02.one.com.

mail.rtf.dk has the same name server delegation as a number of other domains, such as casualpriest.com, countryinfo.org, skoleskib.dk and two more.

ns01.one.com directs to 195.206.121.10 and 2001:67c:28cc::10. ns02.one.com directs to 185.10.11.10 and 2001:67c:3c0::10. Each host name carries two IP addresses.

Mail Servers

mail.rtf.dk routes its mail through a single mail server, rtf-dk.mail.protection.outlook.com.

mail.rtf.dk and domains like rtf.dk share an identical mail server configuration.

rtf-dk.mail.protection.outlook.com directs to 8 IP numbers, including 52.101.68.8, 52.101.68.12 and 52.101.68.15, along with 5 other.