mail.knightsofrizal.cz - robtex.com

mail.knightsofrizal.cz

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:12a6🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:b6c0🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.18.166Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.182.192🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.18.166, 172.67.182.192
IPv6 hints2606:4700:3032::6815:12a6, 2606:4700:3035::ac43:b6c0
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=135, name=cloudflare-ech.com

knightsofrizal.cz

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:12a6🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:b6c0🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.18.166Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.182.192🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSclarissa.ns.cloudflare.com ⭐
NSdamian.ns.cloudflare.com
MX5aac0bdac75ff2d4.mx2.emailprofi.seznam.cz ⭐
MX5aac0bdac75ff2d4.mx1.emailprofi.seznam.cz(20)
TXTv=spf1 include:spf.seznam.cz ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.18.166, 172.67.182.192
IPv6 hints2606:4700:3032::6815:12a6, 2606:4700:3035::ac43:b6c0
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=135, name=cloudflare-ech.com
SOAclarissa.ns.cloudflare.comdns@cloudflare.com serial=2403587065

Previously MX for

knightsofrizal.cz

Same first word

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DNS History

6 records (4 active, 2 former)

20162017201820192020202120222023202420252026A104.21.18.166172.67.182.1922606:4700:3032::6815:12a62606:4700:3035::ac43:b6c05.10.94.462.171.134.62
●A104.21.18.1662026-04-10 → 2026-05-08 · 3 obs
○ 2021-10-11 02:13:34
● 2026-04-10 19:51:16
● 2026-05-08 07:55:38
●A172.67.182.1922026-04-10 → 2026-05-08 · 3 obs
○ 2021-10-11 02:13:34
● 2026-04-10 19:51:16
● 2026-05-08 07:55:38
●A2606:4700:3032::6815:12a62026-04-10 → 2026-05-08 · 3 obs
○ 2021-10-11 02:13:34
● 2026-04-10 19:51:16
● 2026-05-08 07:55:38
●A2606:4700:3035::ac43:b6c02026-04-10 → 2026-05-08 · 3 obs
○ 2021-10-11 02:13:34
● 2026-04-10 19:51:16
● 2026-05-08 07:55:38
○A5.10.94.42015-07-02 → 2016-05-04 · 4 obs
● 2015-07-02 20:16:06
● 2016-05-04 12:54:00
○ 2021-10-11 02:13:34
○ 2026-05-08 07:55:38
○A62.171.134.622021-10-11 → 2021-10-11 · 4 obs
○ 2016-05-04 12:54:00
● 2021-10-11 02:13:34
○ 2026-04-10 19:51:16
○ 2026-05-08 07:55:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
knightsofrizal.czclarissa.ns.cloudflare.com, damian.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.44.50

NS records: clarissa.ns.cloudflare.com, damian.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knightsofrizal.cz (unsigned zone)

⏱️ Timing

Total: 768ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.182.192, 104.21.18.166
AAAA22606:4700:3032::6815:12a6, 2606:4700:3035::ac43:b6c0
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.knightsofrizal.cz points to four IP numbers: 2606:4700:3032::6815:12a6, 2606:4700:3035::ac43:b6c0, 104.21.18.166 and 172.67.182.192.

Other host names, for instance koperateur.com, mail.waeib.biz, enterpriseenrollment.ulinktech.com, ns3.growingmail.com and ns.baidariuagentura.lt share IP numbers with mail.knightsofrizal.cz.