f3j.cz - robtex.com

f3j.cz

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:5cf5🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:c8fb🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.92.245Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.200.251🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSaitana.ns.cloudflare.com ⭐
A2606:4700:50::a29f:26de🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaitana.ns.cloudflare.com
A2803:f800:50::6ca2:c2de🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRaitana.ns.cloudflare.com
A2a06:98c1:50::ac40:22de🇺🇸 Cloudflare2a06:98c1:50::/45
PTRaitana.ns.cloudflare.com
A108.162.194.222🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaitana.ns.cloudflare.com
A162.159.38.222Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaitana.ns.cloudflare.com
A172.64.34.222🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaitana.ns.cloudflare.com
NSignat.ns.cloudflare.com
A2606:4700:58::a29f:2c13🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRignat.ns.cloudflare.com
A2803:f800:50::6ca2:c313🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRignat.ns.cloudflare.com
A2a06:98c1:50::ac40:2313🇺🇸 Cloudflare2a06:98c1:50::/45
PTRignat.ns.cloudflare.com
A108.162.195.19🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRignat.ns.cloudflare.com
A162.159.44.19Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRignat.ns.cloudflare.com
A172.64.35.19🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRignat.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.92.245, 172.67.200.251
IPv6 hints2606:4700:3030::6815:5cf5, 2606:4700:3031::ac43:c8fb
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=9, name=cloudflare-ech.com
SOAaitana.ns.cloudflare.comdns@cloudflare.com serial=2399161821

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=1778563035
WOT: SAFE (74/100)

Same first word

f3j.net
f3j.ch
f3j.it
f3j.dk
f3j.ro
f3j.no
f3j.com
f3j.cz

Similar names

3fj.cn
jf3.info
fj3.ch
fj3.net
3fj.jp
3jf.net
3fj.info
j3f.com.cn
3jf.cn
3jf.com
jf3.top
j3f.de
j3f.net
jf3.net
jf3.de
jf3.com.br
j3f.com.br
3fj.com.cn
3jf.info
j3f.co
3jf.de

DNS History

14 records (6 active, 8 former)

20162017201820192020202120222023202420252026NSaitana.ns.cloudflare.comignat.ns.cloudflare.comalfa.ns.active24.czbeta.ns.active24.czgama.ns.active24.skns.servery.czMXin.smtp.czmx.smtp.czA104.21.92.245172.67.200.2512606:4700:3030::6815:5cf52606:4700:3031::ac43:c8fb2a02:4a8:ac24:102::96:12481.95.96.124
●NSaitana.ns.cloudflare.com2026-04-14 → 2026-05-12 · 3 obs
○ 2016-09-23 04:32:40
● 2026-04-14 06:58:46
● 2026-05-12 05:42:14
○NSalfa.ns.active24.cz2015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
○NSbeta.ns.active24.cz2015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
○NSgama.ns.active24.sk2015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
●NSignat.ns.cloudflare.com2026-04-14 → 2026-05-12 · 3 obs
○ 2016-09-23 04:32:40
● 2026-04-14 06:58:46
● 2026-05-12 05:42:14
○NSns.servery.cz2015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
○MXin.smtp.cz2015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
○MXmx.smtp.cz2015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
●A104.21.92.2452026-04-14 → 2026-05-12 · 3 obs
○ 2016-09-23 04:32:40
● 2026-04-14 06:58:46
● 2026-05-12 05:42:14
●A172.67.200.2512026-04-14 → 2026-05-12 · 3 obs
○ 2016-09-23 04:32:40
● 2026-04-14 06:58:46
● 2026-05-12 05:42:14
●A2606:4700:3030::6815:5cf52026-04-14 → 2026-05-12 · 3 obs
○ 2016-09-23 04:32:40
● 2026-04-14 06:58:46
● 2026-05-12 05:42:14
●A2606:4700:3031::ac43:c8fb2026-04-14 → 2026-05-12 · 3 obs
○ 2016-09-23 04:32:40
● 2026-04-14 06:58:46
● 2026-05-12 05:42:14
○A2a02:4a8:ac24:102::96:1242015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14
○A81.95.96.1242015-08-18 → 2016-09-23 · 4 obs
● 2015-08-18 02:31:24
● 2016-09-23 04:32:40
○ 2026-04-14 06:58:46
○ 2026-05-12 05:42:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz-
f3j.czignat.ns.cloudflare.com, aitana.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.38.222

NS records: ignat.ns.cloudflare.com, aitana.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for f3j.cz (unsigned zone)

⏱️ Timing

Total: 2089ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.92.245, 172.67.200.251
AAAA22606:4700:3030::6815:5cf5, 2606:4700:3031::ac43:c8fb
NS2aitana.ns.cloudflare.com, ignat.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1aitana.ns.cloudflare.com dns.cloudflare.

Analysis

IP Addresses

f3j.cz maps to four IP numbers: 2606:4700:3030::6815:5cf5, 2606:4700:3031::ac43:c8fb, 104.21.92.245 and 172.67.200.251.

Other host names such as dpd.sndgo.cfd, www.5678ou.com, fipo.org.uk, idibaritotimurpemkab.org and wizlife.jp share IPs with f3j.cz.

Name Servers

Two name servers aitana.ns.cloudflare.com and ignat.ns.cloudflare.com handle the delegation for f3j.cz.

f3j.cz shares the same name server setup as other domains, for example pearlworld.online, 10festival.at, entroplus.com, erc-claims-works.help and woodcredit.info.

f3j.cz at least partially shares name servers with other domains, for example ynsdb.com, asceo.cn, 0stud.io, cakhiatvsv2.cc and probology.com.

These name servers are commonly used with raphaela.ns.cloudflare.com and jaime.ns.cloudflare.com and nico.ns.cloudflare.com.

Host names with six IP numbers:

aitana.ns.cloudflare.com points to 2606:4700:50::a29f:26de, 2803:f800:50::6ca2:c2de, 2a06:98c1:50::ac40:22de, 108.162.194.222, 162.159.38.222 and 172.64.34.222.

ignat.ns.cloudflare.com points to 2606:4700:58::a29f:2c13, 2803:f800:50::6ca2:c313, 2a06:98c1:50::ac40:2313, 108.162.195.19, 162.159.44.19 and 172.64.35.19.