usability.dk - dns.ninja

`usability.dk`

DNSSEC	⚠️ Not signed
A	178.20.216.204^{🇩🇰 ASN-ATEA-DK178.20.216.0/24}
		PTR	`sentido.dotserv.com`
NS	`ns1.dotserv.com` ⭐
		A	2a01:7cc0:101:ffff::51^{🇩🇰 ASN-ATEA-DK2a01:7cc0:100::/40}
			PTR	`ns1.dotserv.com`
		A	178.20.218.61^{🇩🇰 ASN-ATEA-DK178.20.218.0/24}
			PTR	`ns1.dotserv.com`
NS	`ns1.dotserv.net`
		A	2a01:7cc0:101:ffff::52^{🇩🇰 ASN-ATEA-DK2a01:7cc0:100::/40}
			PTR	`ns2.dotserv.com`
		A	178.20.217.29^{🇩🇰 ASN-ATEA-DK178.20.217.0/24}
			PTR	`ns1.dotserv.net`
NS	`ns2.dotserv.com`
		A	193.180.214.21^{🇸🇪 WEBDOCK-AS193.180.208.0/21 Webdock.io ApS}
			PTR	`ns2.dotserv.com`
NS	`ns2.dotserv.net`
		A	2001:41d0:701:1100::c89e^{🇩🇪 OVH2001:41d0::/32 IPv6}
			PTR	`ns2.dotserv.net`
		A	162.19.249.51^{🇫🇷 OVH162.19.128.0/17}
			PTR	`ns2.dotserv.net`
MX	`sentido.dotserv.com` ⭐
		A	178.20.216.204^{🇩🇰 ASN-ATEA-DK178.20.216.0/24}
			PTR	`sentido.dotserv.com`
TXT	`v=spf1 include:_spf.dotserv.com -all`
SOA	`ns1.dotserv.com`hostmaster@dotserv.com serial=1361648821

`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 1783167121localtime Sat Jul 4 14:12:01 2026gmtime Sat Ju...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1783167121

Subdomains

mail.usability.dk

www.usability.dk

Same first word

DNS History

8 records (6 active, 2 former)

●NSns1.dotserv.com2015-08-01 → 2026-07-04 · 2 obs

● 2015-08-01 22:43:54
● 2026-07-04 12:38:00

●NSns1.dotserv.net2015-08-01 → 2026-07-04 · 2 obs

● 2015-08-01 22:43:54
● 2026-07-04 12:38:00

●NSns2.dotserv.com2015-08-01 → 2026-07-04 · 2 obs

● 2015-08-01 22:43:54
● 2026-07-04 12:38:00

●NSns2.dotserv.net2015-08-01 → 2026-07-04 · 2 obs

● 2015-08-01 22:43:54
● 2026-07-04 12:38:00

○MXmail.usability.dk2015-08-01 → 2017-03-19 · 4 obs

● 2015-08-01 22:43:54
● 2017-03-19 12:44:56
○ 2026-03-05 05:22:54
○ 2026-07-04 12:38:00

●MXsentido.dotserv.com2026-03-05 → 2026-07-04 · 3 obs

○ 2017-03-19 12:44:56
● 2026-03-05 05:22:54
● 2026-07-04 12:38:00

●A178.20.216.2042026-03-05 → 2026-07-04 · 3 obs

○ 2017-03-19 12:44:56
● 2026-03-05 05:22:54
● 2026-07-04 12:38:00

○A194.126.234.912015-08-01 → 2017-03-19 · 4 obs

● 2015-08-01 22:43:54
● 2017-03-19 12:44:56
○ 2026-03-05 05:22:54
○ 2026-07-04 12:38:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk...	-
usability.dk	ns1.dotserv.com, ns1.dotserv.net, ns2.dotserv.com, ns2.dotserv.net	-

✅ Authoritative Response

Server:193.180.214.21

NS records: ns1.dotserv.com, ns1.dotserv.net, ns2.dotserv.com, ns2.dotserv.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for usability.dk (unsigned zone)

⏱️ Timing

Total: 956ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`178.20.216.204`
NS	4	`ns1.dotserv.net, ns2.dotserv.net...`
MX	1	`sentido.dotserv.com (pri: 10)`
TXT	1	`v=spf1 include:_spf.dotserv.com -all`
SOA	1	`ns1.dotserv.com hostmaster.dotserv.com`

Analysis

Hierarchy

usability.dk serves as the parent of mail.usability.dk and www.usability.dk.

IP Addresses

usability.dk has exactly one IP address — 178.20.216.204.

sentido.dotserv.com, mail.usability.dk, www.usability.dk plus two other host names have IP numbers in common with usability.dk.

Name Servers

Four name servers handle the delegation for usability.dk: ns1.dotserv.com, ns2.dotserv.com, ns1.dotserv.net and ns2.dotserv.net.

usability.dk has at least partial name server overlap with other domains, such as wandborg.dk, karimi.dk, frklarsen.dk and two others.

Host names pointing to two IP addresses:

ns1.dotserv.com resolves to two addresses: 178.20.218.61 and 2a01:7cc0:101:ffff::51.

ns1.dotserv.net resolves to two addresses: 178.20.217.29 and 2a01:7cc0:101:ffff::52.

ns2.dotserv.net resolves to two addresses: 162.19.249.51 and 2001:41d0:701:1100::c89e.

Host names resolving to a single IP address:

The hostname ns2.dotserv.com resolves to 193.180.214.21.

Mail Servers

usability.dk uses one mail server — sentido.dotserv.com.

The mail server setup of usability.dk matches that of other domains such as optuner.dk, oleg.dk, evagregersen.dk and two others.

sentido.dotserv.com carries a single IP number, which is 178.20.216.204.