opt.dk - dns.ninja

opt.dk

DNSSEC⚠️ Not signed
A2606:4700:3034::6815:158a🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:c718🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.21.138Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.199.24🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSnico.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2c93🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnico.ns.cloudflare.com
A2803:f800:50::6ca2:c393🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRnico.ns.cloudflare.com
A2a06:98c1:50::ac40:2393🇺🇸 Cloudflare2a06:98c1:50::/45
PTRnico.ns.cloudflare.com
A108.162.195.147🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnico.ns.cloudflare.com
A162.159.44.147Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnico.ns.cloudflare.com
A172.64.35.147🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnico.ns.cloudflare.com
NSstephane.ns.cloudflare.com
A2606:4700:50::a29f:2670🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRstephane.ns.cloudflare.com
A2803:f800:50::6ca2:c270🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRstephane.ns.cloudflare.com
A2a06:98c1:50::ac40:2270🇺🇸 Cloudflare2a06:98c1:50::/45
PTRstephane.ns.cloudflare.com
A108.162.194.112🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRstephane.ns.cloudflare.com
A162.159.38.112Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRstephane.ns.cloudflare.com
A172.64.34.112🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRstephane.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.21.138, 172.67.199.24
IPv6 hints2606:4700:3034::6815:158a, 2606:4700:3034::ac43:c718
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=235, name=cloudflare-ech.com
SOAnico.ns.cloudflare.comdns@cloudflare.com serial=2406479204

dk

DNSSEC🔒 Signed (DS record present)
NSb.nic.dk ⭐
NSc.nic.dk
NSh.nic.dk
NSl.nic.dk
NSs.nic.dk
NSt.nic.dk
TXTDK zone updateEpoch 1781986681localtime Sat Jun 20 22:18:01 2026gmtime Sat Ju...
SOAb.nic.dktech@punktum.dk serial=1781986681

Subdomains

mail.opt.dk

Same first word

opt.to
opt.by
opt.services
opt.com.ru
opt.mobi
opt.pl
opt.hu
opt.moda
opt.nc
opt.co.il
opt.tv
opt.cc
opt.name
opt.la
opt.ca
opt.ro
opt.se
opt.gg
opt.be
opt.ru
opt.ac
opt.im
opt.kr
opt.net.au
opt.com.pl
opt.ee
opt.msk.ru
opt.cz
opt.pf
opt.sa
opt.hr
opt.kz
opt.ac.cn
opt.co
opt.com.mx
opt.mr
opt.it
opt.net
opt.io
opt.tips
opt.at
opt.tm
opt.ie
opt.de
opt.cn
opt.city
opt.su
opt.me
opt.pt
opt.no
opt.fr
opt.gr
opt.si
opt.life
opt.cv.ua
opt.st
opt.fyi
opt.zone
opt.ae
opt.hk
opt.expert
opt.co.jp
opt.pet
opt.com
opt.mx
opt.eu
opt.co.nz
opt.biz
opt.com.cn
opt.fi
opt.clinic
opt.solutions
opt.cat
opt.legal
opt.nl
opt.dk
opt.ne.jp
opt.uz
opt.sh
opt.network
opt.ch
opt.com.tw
opt.info
opt.vn.ua
opt.org
opt.center
opt.bio

Similar names

pto.com
top.st
pto.ch
top.com.br
pot.us
top.altervista.org
top.lu
top.at
tpo.org
top.tc
top.su
otp.ee
otp.li
tpo.ca
top.dp.ua
top.la
pot.chat
top.s3-website-us-east-1.amazonaws.com
pot.gr
top.tirol
pot.tv
pto.eu
top.construction
top.lk
pot.life
top.football
top.watch
otp.com.vn
pot.cz
top.black
pot.com
pto.se
pot.is
pot.gov.pl
tpo.fi
top.ba
pot.co
top.cl
pto.be
top.hk
top.soccer
top.kim
top.kz
pot.biz
otp.sh
top.world
top.je
pto.services
otp.cat
tpo.org.sg
top.vision
top.org
otp.ua
top.ie
top.cm
top.uk
top.ua
top.com.pl
top.com.qa
otp.nl
otp.lakas.hu
pot.recipes
top.shoes
top.management
pto.no
pot.ph
top.com
pot.bet
top.me
top.club
otp.fr
top.com.ph
pot.nu
pot.de
top.biz
tpo.or.jp
pto.tw
otp.com
top.id
top.org.ua
top.limited
top.in
top.partners
otp.be
top.digital
pto.wa.gov.au
tpo.om
tpo.org.uk
top.show
otp.blue
otp.fi
top.domains
pto.us
tpo.mx
otp.it
pto.ru
pot.live
top.supplies
tpo.fr
top.ag
top.co
top.sk
top.com.cn
tpo.com.cn
top.lv
top.run
top.wtf
top.az
top.blogspot.co.uk
tpo.com
top.global
top.eu
otp.chat
pot.in
otp.ca
top.directory
tpo.jp

DNS History

26 records (6 active, 20 former)

20162017201820192020202120222023202420252026NSnico.ns.cloudflare.comstephane.ns.cloudflare.comns.talkactive.netns01.one.comns02.one.comns1.gratisdns.dkns2.gratisdns.dkns2.talkactive.netns3.gratisdns.dkns3.talkactive.netns4.gratisdns.dkns5.gratisdns.dkMXmail.opt.dkmx1.pub.mailpod7-cph3.one.commx2.pub.mailpod7-cph3.one.commx3.pub.mailpod7-cph3.one.comA104.21.21.138172.67.199.242606:4700:3034::6815:158a2606:4700:3034::ac43:c718172.64.80.1195.128.174.1252606:4700:130:436c:6f75:6466:6c61:72652a02:2350:5:103:7080:0:530a:d17646.30.213.19495.217.219.6
●NSnico.ns.cloudflare.com2026-02-26 → 2026-06-20 · 3 obs
○ 2021-04-19 21:40:36
● 2026-02-26 06:35:34
● 2026-06-20 20:58:48
○NSns.talkactive.net2015-08-01 → 2017-01-10 · 4 obs
● 2015-08-01 04:16:52
● 2017-01-10 08:04:26
○ 2018-09-10 08:56:24
○ 2026-06-20 20:58:48
○NSns01.one.com2018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
○NSns02.one.com2018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
○NSns1.gratisdns.dk2021-04-19 → 2021-04-19 · 4 obs
○ 2018-09-10 08:56:24
● 2021-04-19 21:40:36
○ 2026-02-26 06:35:34
○ 2026-06-20 20:58:48
○NSns2.gratisdns.dk2021-04-19 → 2021-04-19 · 4 obs
○ 2018-09-10 08:56:24
● 2021-04-19 21:40:36
○ 2026-02-26 06:35:34
○ 2026-06-20 20:58:48
○NSns2.talkactive.net2015-08-01 → 2017-01-10 · 4 obs
● 2015-08-01 04:16:52
● 2017-01-10 08:04:26
○ 2018-09-10 08:56:24
○ 2026-06-20 20:58:48
○NSns3.gratisdns.dk2021-04-19 → 2021-04-19 · 4 obs
○ 2018-09-10 08:56:24
● 2021-04-19 21:40:36
○ 2026-02-26 06:35:34
○ 2026-06-20 20:58:48
○NSns3.talkactive.net2015-08-01 → 2017-01-10 · 4 obs
● 2015-08-01 04:16:52
● 2017-01-10 08:04:26
○ 2018-09-10 08:56:24
○ 2026-06-20 20:58:48
○NSns4.gratisdns.dk2021-04-19 → 2021-04-19 · 4 obs
○ 2018-09-10 08:56:24
● 2021-04-19 21:40:36
○ 2026-02-26 06:35:34
○ 2026-06-20 20:58:48
○NSns5.gratisdns.dk2021-04-19 → 2021-04-19 · 4 obs
○ 2018-09-10 08:56:24
● 2021-04-19 21:40:36
○ 2026-02-26 06:35:34
○ 2026-06-20 20:58:48
●NSstephane.ns.cloudflare.com2026-02-26 → 2026-06-20 · 3 obs
○ 2021-04-19 21:40:36
● 2026-02-26 06:35:34
● 2026-06-20 20:58:48
○MXmail.opt.dk2015-08-01 → 2017-01-10 · 4 obs
● 2015-08-01 04:16:52
● 2017-01-10 08:04:26
○ 2018-09-10 08:56:24
○ 2026-06-20 20:58:48
○MXmx1.pub.mailpod7-cph3.one.com2018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
○MXmx2.pub.mailpod7-cph3.one.com2018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
○MXmx3.pub.mailpod7-cph3.one.com2018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
●A104.21.21.1382026-02-26 → 2026-06-20 · 5 obs
○ 2021-04-19 21:40:36
● 2026-02-26 06:35:34
○ 2026-03-03 11:36:34
● 2026-03-05 20:20:06
● 2026-06-20 20:58:48
○A172.64.80.12026-03-03 → 2026-03-03 · 4 obs
○ 2026-02-26 06:35:34
● 2026-03-03 11:36:34
○ 2026-03-05 20:20:06
○ 2026-06-20 20:58:48
●A172.67.199.242026-02-26 → 2026-06-20 · 5 obs
○ 2021-04-19 21:40:36
● 2026-02-26 06:35:34
○ 2026-03-03 11:36:34
● 2026-03-05 20:20:06
● 2026-06-20 20:58:48
○A195.128.174.1252015-08-01 → 2017-01-10 · 4 obs
● 2015-08-01 04:16:52
● 2017-01-10 08:04:26
○ 2018-09-10 08:56:24
○ 2026-06-20 20:58:48
○A2606:4700:130:436c:6f75:6466:6c61:72652026-03-03 → 2026-03-03 · 4 obs
○ 2026-02-26 06:35:34
● 2026-03-03 11:36:34
○ 2026-03-05 20:20:06
○ 2026-06-20 20:58:48
●A2606:4700:3034::6815:158a2026-02-26 → 2026-06-20 · 5 obs
○ 2021-04-19 21:40:36
● 2026-02-26 06:35:34
○ 2026-03-03 11:36:34
● 2026-03-05 20:20:06
● 2026-06-20 20:58:48
●A2606:4700:3034::ac43:c7182026-02-26 → 2026-06-20 · 5 obs
○ 2021-04-19 21:40:36
● 2026-02-26 06:35:34
○ 2026-03-03 11:36:34
● 2026-03-05 20:20:06
● 2026-06-20 20:58:48
○A2a02:2350:5:103:7080:0:530a:d1762018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
○A46.30.213.1942018-09-10 → 2018-09-10 · 4 obs
○ 2017-01-10 08:04:26
● 2018-09-10 08:56:24
○ 2021-04-19 21:40:36
○ 2026-06-20 20:58:48
○A95.217.219.62021-04-19 → 2021-04-19 · 4 obs
○ 2018-09-10 08:56:24
● 2021-04-19 21:40:36
○ 2026-02-26 06:35:34
○ 2026-06-20 20:58:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dkc.nic.dk, b.nic.dk, t.nic.dk, s.nic.dk...-
opt.dknico.ns.cloudflare.com, stephane.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.194.112

NS records: nico.ns.cloudflare.com, stephane.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opt.dk (unsigned zone)

⏱️ Timing

Total: 545ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.199.24, 104.21.21.138
AAAA22606:4700:3034::ac43:c718, 2606:4700:3034::6815:158a
NS2nico.ns.cloudflare.com, stephane.ns.cloudflare.com
MX1. (pri: 0)
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1nico.ns.cloudflare.com dns.cloudflare.co

Analysis

Hierarchy

The domain mail.opt.dk falls under the parent opt.dk.

IP Addresses

opt.dk points to the four IP addresses 104.21.21.138, 172.67.199.24, 2606:4700:3034::6815:158a and 2606:4700:3034::ac43:c718.

Among the host names that share IP numbers with opt.dk are www.artpulsion.com, finalescope.co.uk, genamiveisanalytics.click and two others.

Name Servers

opt.dk is served by two delegated name servers, nico.ns.cloudflare.com and stephane.ns.cloudflare.com.

opt.dk has the same name server delegation as a number of other domains, such as google-io-ai-agent-2026-media.pages.dev, cleanmylink.com, scnr.com and two more.

At least some of opt.dk's name servers are shared with other domains, for example vion.bz.it, 6222js.com, capitalmarketspecialist.com and two more.

These name servers tend to be used in conjunction with the name servers julissa.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

nico.ns.cloudflare.com carries IP addresses 108.162.195.147, 162.159.44.147 and 172.64.35.147, with 3 other addresses beyond those.

stephane.ns.cloudflare.com carries IP addresses 108.162.194.112, 162.159.38.112 and 172.64.34.112, with 3 other addresses beyond those.