dotc.dk - dns.ninja

`dotc.dk`

DNSSEC	🔒 Signed (DS record present)
A	87.104.3.9^{🇩🇰 FIBIA-P-S87.104.0.0/18 Fibia IPv4 Network}
		PTR	`87.104.3.9.static.fibianet.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	`mail.itsup.dk` ⭐
		A	87.104.3.9^{🇩🇰 FIBIA-P-S87.104.0.0/18 Fibia IPv4 Network}
			PTR	`87.104.3.9.static.fibianet.dk`
TXT	`v=spf1 mx a:mail.itsup.dk ~all`
TXT	`v=spf1 include:_custspf.one.com ~all`
SOA	`ns01.one.com`hostmaster@one.com 2026-07-30 #1

`dk`

	DNSSEC	🔒 Signed (DS record present)
	NS	`b.nic.dk` ⭐
	NS	`c.nic.dk`
	NS	`h.nic.dk`
	NS	`l.nic.dk`
	NS	`s.nic.dk`
	NS	`t.nic.dk`
	TXT	`DK zone updateEpoch 1786105620localtime Fri Aug 7 14:27:00 2026gmtime Fri Au...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1786105621

Same first word

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doct.pro

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dcot.in

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tdco.co.kr

odct.ru

dcto.com

dcot.ru

tdoc.de

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tcdo.jp

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otdc.ir

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DNS History

14 records (4 active, 10 former)

○NSns-1240.awsdns-27.org2015-07-21 → 2017-07-24 · 4 obs

● 2015-07-21 17:58:26
● 2017-07-24 23:45:00
○ 2026-02-17 07:08:22
○ 2026-08-07 13:16:32

○NSns-1653.awsdns-14.co.uk2015-07-21 → 2017-07-24 · 4 obs

● 2015-07-21 17:58:26
● 2017-07-24 23:45:00
○ 2026-02-17 07:08:22
○ 2026-08-07 13:16:32

○NSns-417.awsdns-52.com2015-07-21 → 2017-07-24 · 4 obs

● 2015-07-21 17:58:26
● 2017-07-24 23:45:00
○ 2026-02-17 07:08:22
○ 2026-08-07 13:16:32

○NSns-861.awsdns-43.net2015-07-21 → 2017-07-24 · 4 obs

● 2015-07-21 17:58:26
● 2017-07-24 23:45:00
○ 2026-02-17 07:08:22
○ 2026-08-07 13:16:32

●NSns01.one.com2026-07-05 → 2026-08-07 · 3 obs

○ 2026-05-24 10:58:22
● 2026-07-05 09:01:06
● 2026-08-07 13:16:32

●NSns02.one.com2026-07-05 → 2026-08-07 · 3 obs

○ 2026-05-24 10:58:22
● 2026-07-05 09:01:06
● 2026-08-07 13:16:32

○NSns1.digitalocean.com2026-02-17 → 2026-05-24 · 5 obs

○ 2017-07-24 23:45:00
● 2026-02-17 07:08:22
● 2026-05-24 10:58:22
○ 2026-07-05 09:01:06
○ 2026-08-07 13:16:32

○NSns2.digitalocean.com2026-02-17 → 2026-05-24 · 5 obs

○ 2017-07-24 23:45:00
● 2026-02-17 07:08:22
● 2026-05-24 10:58:22
○ 2026-07-05 09:01:06
○ 2026-08-07 13:16:32

○NSns3.digitalocean.com2026-02-17 → 2026-05-24 · 5 obs

○ 2017-07-24 23:45:00
● 2026-02-17 07:08:22
● 2026-05-24 10:58:22
○ 2026-07-05 09:01:06
○ 2026-08-07 13:16:32

○MXinbound-smtp.eu-west-1.amazonaws.com2017-04-05 → 2017-07-24 · 5 obs

○ 2016-06-18 15:17:18
● 2017-04-05 16:05:20
● 2017-07-24 23:45:00
○ 2026-02-17 07:08:22
○ 2026-08-07 13:16:32

○MXmail.huzza.dk2015-07-21 → 2016-06-18 · 4 obs

● 2015-07-21 17:58:26
● 2016-06-18 15:17:18
○ 2017-04-05 16:05:20
○ 2026-08-07 13:16:32

●MXmail.itsup.dk2026-02-17 → 2026-08-07 · 3 obs

○ 2017-07-24 23:45:00
● 2026-02-17 07:08:22
● 2026-08-07 13:16:32

○A54.171.100.1272015-07-21 → 2017-07-24 · 4 obs

● 2015-07-21 17:58:26
● 2017-07-24 23:45:00
○ 2026-02-17 07:08:22
○ 2026-08-07 13:16:32

●A87.104.3.92026-02-17 → 2026-08-07 · 3 obs

○ 2017-07-24 23:45:00
● 2026-02-17 07:08:22
● 2026-08-07 13:16:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, s.nic.dk, c.nic.dk, l.nic.dk...	-
dotc.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: 980ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`87.104.3.9`
NS	2	`ns01.one.com, ns02.one.com`
MX	1	`mail.itsup.dk (pri: 0)`
TXT	2	`v=spf1 mx a:mail.itsup.dk ~all, v=spf1 include:_custspf.one.com ~all`
SOA	1	`ns01.one.com hostmaster.one.com`

Analysis

IP Addresses

dotc.dk has exactly one IP address — 87.104.3.9.

mail.itsup.dk, itsup.dk, 87.104.3.9.static.fibianet.dk and cxz.dk are examples of host names that share IP numbers with dotc.dk.

Name Servers

Two name servers handle the delegation for dotc.dk: ns01.one.com and ns02.one.com.

The name server configuration of dotc.dk is shared with other domains, for instance osis.dk, slowmail.dk, stylesnob.com and two others.

ns01.one.com and ns02.one.com both carry two IP addresses. The A records for ns01.one.com are 195.206.121.10 and 2001:67c:28cc::10; the A records for ns02.one.com are 185.10.11.10 and 2001:67c:3c0::10.

Mail Servers

dotc.dk uses one mail server — mail.itsup.dk.

The mail server configuration of dotc.dk is identical to that of other domains, for example cxz.dk and itsup.dk.

mail.itsup.dk carries a single IP number, which is 87.104.3.9.