construct.cz - dns.ninja

construct.cz

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:94f🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3030::ac43:bd2e🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.9.79Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.189.46🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSkara.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3a7b🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkara.ns.cloudflare.com
A2803:f800:50::6ca2:c07b🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRkara.ns.cloudflare.com
A2a06:98c1:50::ac40:207b🇺🇸 Cloudflare2a06:98c1:50::/45
PTRkara.ns.cloudflare.com
A108.162.192.123🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkara.ns.cloudflare.com
A172.64.32.123🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkara.ns.cloudflare.com
A173.245.58.123🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkara.ns.cloudflare.com
NSlars.ns.cloudflare.com
A2606:4700:58::adf5:3bc3🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlars.ns.cloudflare.com
A2803:f800:50::6ca2:c1c3🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRlars.ns.cloudflare.com
A2a06:98c1:50::ac40:21c3🇺🇸 Cloudflare2a06:98c1:50::/45
PTRlars.ns.cloudflare.com
A108.162.193.195🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlars.ns.cloudflare.com
A172.64.33.195🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlars.ns.cloudflare.com
A173.245.59.195🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlars.ns.cloudflare.com
MXmx2.construct.cz ⭐
A81.0.254.169🇨🇿 CASABLANCA-AS81.0.254.0/23 Casablanca INT
PTRunassigned-81-0-254-169.casablanca.cz
MXmail.comacomp.cz(300)
A2a03:6e80:0:ff02::2🇨🇿 COMA2a03:6e80::/32 Aggregate for CZ-COMA
PTRmail.comacomp.cz
A84.16.96.6🇨🇿 COMA84.16.96.0/19 Aggregate for CZ-COMA-20040714
PTRmail.comacomp.cz
MXmx.construct.cz(500)
A84.21.115.50🇨🇿 COMA84.21.96.0/19 Aggregate for CZ-COMA-20040913
PTRcl084021115050.unet.cz
MXmail.construct.cz(10000)
A84.21.115.46🇨🇿 COMA84.21.96.0/19 Aggregate for CZ-COMA-20040913
PTRmail.construct.cz
TXTv=spf1 ip4:85.163.104.2 ip4:83.167.250.161 ip4:84.16.96.6 ip4:84.21.115.50 ip...
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.9.79, 172.67.189.46
IPv6 hints2606:4700:3030::6815:94f, 2606:4700:3030::ac43:bd2e
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=98, name=cloudflare-ech.com
SOAkara.ns.cloudflare.comdns@cloudflare.com serial=2407997766

cz

DNSSEC🔒 Signed (DS record present)
NSa.ns.nic.cz ⭐
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1783955838
WOT: SAFE (76/100)

Subdomains

mx2.construct.cz
mail.construct.cz
mx.construct.cz
www.construct.cz

Same first word

construct.be
construct.energy
construct.shop
construct.nl
construct.ch
construct.net
construct.eu
construct.company
construct.gr
construct.info
construct.cz
construct.tech
construct.us
construct.com.au
construct.fr
construct.hu
construct.agency
construct.sk
construct.in
construct.com.sg
construct.today
construct.ro
construct.ddns.net
construct.one
construct.io
construct.at
construct.bio
construct.com
construct.md
construct.app
construct.sg
construct.my
construct.media
construct.com.pk
construct.online
construct.life
construct.ai
construct.systems
construct.ca
construct.is
construct.studio
construct.pro
construct.readthedocs.io
construct.com.ua
construct.tools
construct.co
construct.tv
construct.me
construct.ie
construct.zone

Similar names

cscottrun.com
cntrustco.com
structcon.ca
structcon.org
tconstruc.com
structcon.net
structcon.in
trustconc.com
structcon.com

DNS History

20 records (10 active, 10 former)

20162017201820192020202120222023202420252026NSkara.ns.cloudflare.comlars.ns.cloudflare.comdns.alm.czjs.alm.czMXmail.comacomp.czmail.construct.czmx.construct.czmx2.construct.czA104.21.9.79172.67.189.462606:4700:3030::6815:94f2606:4700:3030::ac43:bd2e109.123.208.43109.123.209.191188.114.96.0188.114.97.02606:4700:3035::ac43:bd2e2a06:98c1:3120::2a06:98c1:3121::88.86.113.161
○NSdns.alm.cz2015-07-03 → 2017-01-02 · 4 obs
● 2015-07-03 19:16:06
● 2017-01-02 17:51:14
○ 2026-02-20 13:41:32
○ 2026-07-13 16:13:10
○NSjs.alm.cz2015-07-03 → 2017-01-02 · 4 obs
● 2015-07-03 19:16:06
● 2017-01-02 17:51:14
○ 2026-02-20 13:41:32
○ 2026-07-13 16:13:10
●NSkara.ns.cloudflare.com2026-02-20 → 2026-07-13 · 3 obs
○ 2017-01-02 17:51:14
● 2026-02-20 13:41:32
● 2026-07-13 16:13:10
●NSlars.ns.cloudflare.com2026-02-20 → 2026-07-13 · 3 obs
○ 2017-01-02 17:51:14
● 2026-02-20 13:41:32
● 2026-07-13 16:13:10
●MXmail.comacomp.cz2015-07-03 → 2026-07-13 · 2 obs
● 2015-07-03 19:16:06
● 2026-07-13 16:13:10
●MXmail.construct.cz2015-07-03 → 2026-07-13 · 2 obs
● 2015-07-03 19:16:06
● 2026-07-13 16:13:10
●MXmx.construct.cz2015-07-03 → 2026-07-13 · 2 obs
● 2015-07-03 19:16:06
● 2026-07-13 16:13:10
●MXmx2.construct.cz2015-07-03 → 2026-07-13 · 2 obs
● 2015-07-03 19:16:06
● 2026-07-13 16:13:10
●A104.21.9.792026-02-20 → 2026-07-13 · 14 obs
○ 2017-01-02 17:51:14
● 2026-02-20 13:41:32
● 2026-02-24 16:35:34
○ 2026-03-07 02:10:04
● 2026-03-11 04:53:44
● 2026-03-14 09:30:10
○ 2026-03-24 00:35:26
● 2026-03-29 11:43:38
● 2026-04-01 22:35:38
○ 2026-04-04 11:42:50
● 2026-04-07 04:33:42
○ 2026-06-24 16:29:02
● 2026-07-13 16:13:08
● 2026-07-13 16:13:10
○A109.123.208.432015-11-09 → 2016-04-30 · 5 obs
○ 2015-07-03 19:16:06
● 2015-11-09 19:16:40
● 2016-04-30 03:27:46
○ 2017-01-02 17:51:14
○ 2026-07-13 16:13:10
○A109.123.209.1912015-07-03 → 2015-07-03 · 3 obs
● 2015-07-03 19:16:06
○ 2015-11-09 19:16:40
○ 2026-07-13 16:13:10
●A172.67.189.462026-02-20 → 2026-07-13 · 14 obs
○ 2017-01-02 17:51:14
● 2026-02-20 13:41:32
● 2026-02-24 16:35:34
○ 2026-03-07 02:10:04
● 2026-03-11 04:53:44
● 2026-03-14 09:30:10
○ 2026-03-24 00:35:26
● 2026-03-29 11:43:38
● 2026-04-01 22:35:38
○ 2026-04-04 11:42:50
● 2026-04-07 04:33:42
○ 2026-06-24 16:29:02
● 2026-07-13 16:13:08
● 2026-07-13 16:13:10
○A188.114.96.02026-03-07 → 2026-06-24 · 12 obs
○ 2026-02-24 16:35:34
● 2026-03-07 02:10:04
○ 2026-03-11 04:53:44
○ 2026-03-14 09:30:10
● 2026-03-24 00:35:26
○ 2026-03-29 11:43:38
○ 2026-04-01 22:35:38
● 2026-04-04 11:42:50
○ 2026-04-07 04:33:42
● 2026-06-24 16:29:02
○ 2026-07-13 16:13:08
○ 2026-07-13 16:13:10
○A188.114.97.02026-03-07 → 2026-06-24 · 12 obs
○ 2026-02-24 16:35:34
● 2026-03-07 02:10:04
○ 2026-03-11 04:53:44
○ 2026-03-14 09:30:10
● 2026-03-24 00:35:26
○ 2026-03-29 11:43:38
○ 2026-04-01 22:35:38
● 2026-04-04 11:42:50
○ 2026-04-07 04:33:42
● 2026-06-24 16:29:02
○ 2026-07-13 16:13:08
○ 2026-07-13 16:13:10
●A2606:4700:3030::6815:94f2026-02-20 → 2026-07-13 · 14 obs
○ 2017-01-02 17:51:14
● 2026-02-20 13:41:32
● 2026-02-24 16:35:34
○ 2026-03-07 02:10:04
● 2026-03-11 04:53:44
● 2026-03-14 09:30:10
○ 2026-03-24 00:35:26
● 2026-03-29 11:43:38
● 2026-04-01 22:35:38
○ 2026-04-04 11:42:50
● 2026-04-07 04:33:42
○ 2026-06-24 16:29:02
● 2026-07-13 16:13:08
● 2026-07-13 16:13:10
●A2606:4700:3030::ac43:bd2e2026-07-13 → 2026-07-13 · 3 obs
○ 2026-06-24 16:29:02
● 2026-07-13 16:13:08
● 2026-07-13 16:13:10
○A2606:4700:3035::ac43:bd2e2026-02-20 → 2026-04-07 · 13 obs
○ 2017-01-02 17:51:14
● 2026-02-20 13:41:32
● 2026-02-24 16:35:34
○ 2026-03-07 02:10:04
● 2026-03-11 04:53:44
● 2026-03-14 09:30:10
○ 2026-03-24 00:35:26
● 2026-03-29 11:43:38
● 2026-04-01 22:35:38
○ 2026-04-04 11:42:50
● 2026-04-07 04:33:42
○ 2026-06-24 16:29:02
○ 2026-07-13 16:13:10
○A2a06:98c1:3120::2026-03-07 → 2026-06-24 · 12 obs
○ 2026-02-24 16:35:34
● 2026-03-07 02:10:04
○ 2026-03-11 04:53:44
○ 2026-03-14 09:30:10
● 2026-03-24 00:35:26
○ 2026-03-29 11:43:38
○ 2026-04-01 22:35:38
● 2026-04-04 11:42:50
○ 2026-04-07 04:33:42
● 2026-06-24 16:29:02
○ 2026-07-13 16:13:08
○ 2026-07-13 16:13:10
○A2a06:98c1:3121::2026-03-07 → 2026-06-24 · 12 obs
○ 2026-02-24 16:35:34
● 2026-03-07 02:10:04
○ 2026-03-11 04:53:44
○ 2026-03-14 09:30:10
● 2026-03-24 00:35:26
○ 2026-03-29 11:43:38
○ 2026-04-01 22:35:38
● 2026-04-04 11:42:50
○ 2026-04-07 04:33:42
● 2026-06-24 16:29:02
○ 2026-07-13 16:13:08
○ 2026-07-13 16:13:10
○A88.86.113.1612017-01-02 → 2017-01-02 · 4 obs
○ 2016-04-30 03:27:46
● 2017-01-02 17:51:14
○ 2026-02-20 13:41:32
○ 2026-07-13 16:13:10

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czb.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz-
construct.czkara.ns.cloudflare.com, lars.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.123

NS records: kara.ns.cloudflare.com, lars.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for construct.cz (unsigned zone)

⏱️ Timing

Total: 825ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.189.46, 104.21.9.79
AAAA22606:4700:3030::6815:94f, 2606:4700:3030::ac43:bd2e
NS2kara.ns.cloudflare.com, lars.ns.cloudflare.com
MX4mx.construct.cz (pri: 100), mail.construct.cz (pri: 10000)...
TXT1v=spf1 ip4:85.163.104.2 ip4:83.167.250.1
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1kara.ns.cloudflare.com dns.cloudflare.co

Analysis

Hierarchy

mx2.construct.cz, mail.construct.cz, mx.construct.cz and www.construct.cz each fall under the parent domain construct.cz.

IP Addresses

construct.cz has four IP addresses: 104.21.9.79, 172.67.189.46, 2606:4700:3030::6815:94f and 2606:4700:3030::ac43:bd2e.

Additional host names — jmcomic18.com, primewire.digital, afuking.com and two others — share IP numbers with construct.cz.

Name Servers

construct.cz uses two name servers for its delegation: kara.ns.cloudflare.com and lars.ns.cloudflare.com.

construct.cz shares its name server setup with other domains, including azhuge233.com, inf.org, froize.co.uk and two others.

construct.cz partially shares its NS delegation with several other domains, including veterandefenders.org, sig-m.co.il, hendrey.com.au and two others.

These name servers often co-occur with the name servers bonnie.ns.cloudflare.com.

Host names with 6 IP numbers:

Hostname kara.ns.cloudflare.com directs to 108.162.192.123, 172.64.32.123 and 173.245.58.123 along with 3 other IP addresses.

Hostname lars.ns.cloudflare.com directs to 108.162.193.195, 172.64.33.195 and 173.245.59.195 along with 3 other IP addresses.

Mail Servers

Four mail servers handle email for construct.cz: mail.comacomp.cz, mail.construct.cz, mx2.construct.cz and mx.construct.cz.

construct.cz shares mail servers — at least in part — with other domains, including rajcha.cz, tdnet.cz, drevotvarbystre.cz and two others.

The mail servers smtpb-in-2.worldonline.cz and mail.drevotvarbystre.cz regularly co-occur with these mail servers.

Host names with two IP numbers:

mail.comacomp.cz directs traffic to 84.16.96.6 and 2a03:6e80:0:ff02::2.

Host names pointing to a single IP address:

mail.construct.cz has the IP address 84.21.115.46.

mx2.construct.cz has the IP address 81.0.254.169.

mx.construct.cz has the IP address 84.21.115.50.