certn.com - dns.ninja

certn.com

DNSSEC⚠️ Not signed
A2606:4700::6812:e4f🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700::6812:f4f🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.18.14.79Cloudflare104.18.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.18.15.79Cloudflare104.18.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbob.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b68🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbob.ns.cloudflare.com
A2803:f800:50::6ca2:c168🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRbob.ns.cloudflare.com
A2a06:98c1:50::ac40:2168🇺🇸 Cloudflare2a06:98c1:50::/45
PTRbob.ns.cloudflare.com
A108.162.193.104🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbob.ns.cloudflare.com
A172.64.33.104🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbob.ns.cloudflare.com
A173.245.59.104🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbob.ns.cloudflare.com
NSreza.ns.cloudflare.com
A2606:4700:50::adf5:3ad9🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRreza.ns.cloudflare.com
A2803:f800:50::6ca2:c0d9🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRreza.ns.cloudflare.com
A2a06:98c1:50::ac40:20d9🇺🇸 Cloudflare2a06:98c1:50::/45
PTRreza.ns.cloudflare.com
A108.162.192.217🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRreza.ns.cloudflare.com
A172.64.32.217🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRreza.ns.cloudflare.com
A173.245.58.217🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRreza.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.18.14.79, 104.18.15.79
IPv6 hints2606:4700::6812:e4f, 2606:4700::6812:f4f
SOAbob.ns.cloudflare.comdns@cloudflare.com serial=2409698454

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1786351654

Subdomains

www.certn.com

Same first word

certn.global
certn.co
certn.org
certn.co.uk
certn.com
certn.net
certn.ru
certn.cn

Similar names

rcnet.com.br
centr.org.ua
centr.in.ua
centr.su
centr.services
ncert.net
crnet.com.hk
centr.tv
rtecn.com
nertc.com
rcnet.net.br
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crent.ir
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rcent.us
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centr.org
crent.net
centr.kg
ncert.com
centr.it
crent.eu
rcent.hu
centr.zp.ua
ntrec.com
nrtec.co.kr
crent.in
centr.ua
centr.com.tw
rcnet.ru
trenc.sk
crnet.co.jp
rentc.ru
crnet.ws
crnet.fi
cnert.com
crnet.cr
centr.pro
rcnet.ro
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erctn.com
encrt.com
rcnet.de
netrc.org
centr.spb.ru
ncter.com
ntrec.org
ncert.org.in
rcnet.cl
tcren.cn
centr.es
crent.ru
crnet.dk
rcnet.org
ncert.org
rntce.co.uk
crnet.dev
centr.od.ua
nectr.com
crnet.cn
cnter.net
centr.be
ctren.com
centr.info
crnet.it
rcnet.cn
nrtec.de
crnet.com.ar
centr.top
cetrn.com
centr.kz
rcnet.ne.jp
rntec.com
enctr.gg
trenc.net
tnerc.gov.in
crnet.com.br
tcren.cc
crent.com
rcnet.com
crnet.in
netrc.com
nectr.au
rcnet.net
ncert.gov.ph
trnce.com
rcent.com
crnet.com.cn
netrc.org.cn
centr.ing
trenc.org
centr.one
ternc.com
crnet.com
crnet.de
ntcer.com
nectr.net.au
centr.ru
centr.com
centr.online
centr.sk
nrtec.com.mx
crnet.eu
ncert.gov.in
cetrn.cn
centr.me
centr.expert
centr.cz
cnetr.com
netrc.xyz
crent.de
crnet.cz
centr.de
nrtec.ru
centr.by
renct.com
crent.info
nertc.org
rcent.ru
crnet.net
centr.news
crnet.org
tncre.net
rcten.com
nctre.com
centr.lviv.ua
centr.al
centr.com.ua
crent.sk
nectr.energy
nectr.com.au
ncert.nic.in
ncret.com
crent.ca

DNS History

14 records (6 active, 8 former)

20162017201820192020202120222023202420252026NSbob.ns.cloudflare.comreza.ns.cloudflare.comns-1463.awsdns-54.orgns-1558.awsdns-02.co.ukns-175.awsdns-21.comns-983.awsdns-58.netns05.domaincontrol.comns06.domaincontrol.comMXmail.certn.comA104.18.14.79104.18.15.792606:4700::6812:e4f2606:4700::6812:f4f50.28.60.28
●NSbob.ns.cloudflare.com2026-02-19 → 2026-08-10 · 3 obs
○ 2021-05-23 17:58:28
● 2026-02-19 14:36:26
● 2026-08-10 09:11:02
○NSns-1463.awsdns-54.org2021-05-23 → 2021-05-23 · 4 obs
○ 2017-02-12 16:51:56
● 2021-05-23 17:58:28
○ 2026-02-19 14:36:26
○ 2026-08-10 09:11:02
○NSns-1558.awsdns-02.co.uk2021-05-23 → 2021-05-23 · 4 obs
○ 2017-02-12 16:51:56
● 2021-05-23 17:58:28
○ 2026-02-19 14:36:26
○ 2026-08-10 09:11:02
○NSns-175.awsdns-21.com2021-05-23 → 2021-05-23 · 4 obs
○ 2017-02-12 16:51:56
● 2021-05-23 17:58:28
○ 2026-02-19 14:36:26
○ 2026-08-10 09:11:02
○NSns-983.awsdns-58.net2021-05-23 → 2021-05-23 · 4 obs
○ 2017-02-12 16:51:56
● 2021-05-23 17:58:28
○ 2026-02-19 14:36:26
○ 2026-08-10 09:11:02
○NSns05.domaincontrol.com2015-07-03 → 2017-02-12 · 4 obs
● 2015-07-03 07:54:02
● 2017-02-12 16:51:56
○ 2021-05-23 17:58:28
○ 2026-08-10 09:11:02
○NSns06.domaincontrol.com2015-07-03 → 2017-02-12 · 4 obs
● 2015-07-03 07:54:02
● 2017-02-12 16:51:56
○ 2021-05-23 17:58:28
○ 2026-08-10 09:11:02
●NSreza.ns.cloudflare.com2026-02-19 → 2026-08-10 · 3 obs
○ 2021-05-23 17:58:28
● 2026-02-19 14:36:26
● 2026-08-10 09:11:02
○MXmail.certn.com2015-07-03 → 2017-02-12 · 4 obs
● 2015-07-03 07:54:02
● 2017-02-12 16:51:56
○ 2021-05-23 17:58:28
○ 2026-08-10 09:11:02
●A104.18.14.792026-02-19 → 2026-08-10 · 3 obs
○ 2021-05-23 17:58:28
● 2026-02-19 14:36:26
● 2026-08-10 09:11:02
●A104.18.15.792026-02-19 → 2026-08-10 · 3 obs
○ 2021-05-23 17:58:28
● 2026-02-19 14:36:26
● 2026-08-10 09:11:02
●A2606:4700::6812:e4f2026-02-19 → 2026-08-10 · 3 obs
○ 2021-05-23 17:58:28
● 2026-02-19 14:36:26
● 2026-08-10 09:11:02
●A2606:4700::6812:f4f2026-02-19 → 2026-08-10 · 3 obs
○ 2021-05-23 17:58:28
● 2026-02-19 14:36:26
● 2026-08-10 09:11:02
○A50.28.60.282015-07-03 → 2017-02-12 · 4 obs
● 2015-07-03 07:54:02
● 2017-02-12 16:51:56
○ 2021-05-23 17:58:28
○ 2026-08-10 09:11:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, g.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net...-
certn.combob.ns.cloudflare.com, reza.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.217

NS records: bob.ns.cloudflare.com, reza.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for certn.com (unsigned zone)

⏱️ Timing

Total: 124ms | Queries: -

📄 Records

TypeCountSample Data
A2104.18.15.79, 104.18.14.79
AAAA22606:4700::6812:f4f, 2606:4700::6812:e4f
NS2bob.ns.cloudflare.com, reza.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1bob.ns.cloudflare.com dns.cloudflare.com

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (bob.ns.cloudflare.com, bob.ns.cloudflare.com, bob.ns.cloudflare.com...)

Analysis

Hierarchy

www.certn.com is delegated beneath certn.com.

IP Addresses

certn.com directs to four IP numbers, which are 104.18.14.79, 104.18.15.79, 2606:4700::6812:e4f and 2606:4700::6812:f4f.

Among the host names that share IP numbers with certn.com are casamentosdesantoantonio.cm-lisboa.pt, f45challenge.com, ukmerge.lt and two others.

Name Servers

certn.com has two authoritative name servers — bob.ns.cloudflare.com and reza.ns.cloudflare.com.

certn.com has the same name server delegation as a number of other domains, such as koreamarket.cl, barbearia.org, viajanteemserie.com.br and two more.

There is at least partial name server overlap between certn.com and other domains — wcblbaseball.com, kube.events, dnepredu.com and two more among them.

Host names resolving to 6 IP numbers:

bob.ns.cloudflare.com points to 108.162.193.104, 172.64.33.104, 173.245.59.104 and 3 other IP addresses.

reza.ns.cloudflare.com points to 108.162.192.217, 172.64.32.217, 173.245.58.217 and 3 other IP addresses.