grcs.cz - robtex.com

grcs.cz

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:b170🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::6815:5390🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.83.144Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.177.112🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSivan.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b78🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRivan.ns.cloudflare.com
A2803:f800:50::6ca2:c178🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRivan.ns.cloudflare.com
A2a06:98c1:50::ac40:2178🇺🇸 Cloudflare2a06:98c1:50::/45
PTRivan.ns.cloudflare.com
A108.162.193.120🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRivan.ns.cloudflare.com
A172.64.33.120🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRivan.ns.cloudflare.com
A173.245.59.120🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRivan.ns.cloudflare.com
NSkay.ns.cloudflare.com
A2606:4700:50::adf5:3a7d🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkay.ns.cloudflare.com
A2803:f800:50::6ca2:c07d🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRkay.ns.cloudflare.com
A2a06:98c1:50::ac40:207d🇺🇸 Cloudflare2a06:98c1:50::/45
PTRkay.ns.cloudflare.com
A108.162.192.125🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkay.ns.cloudflare.com
A172.64.32.125🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkay.ns.cloudflare.com
A173.245.58.125🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkay.ns.cloudflare.com
MXmail2.orcan.uk ⭐
TXTv=spf1 a:pmg2.orcan.uk a:pmg3.orcan.uk -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.83.144, 172.67.177.112
IPv62606:4700:3032::ac43:b170, 2606:4700:3033::6815:5390
SOAivan.ns.cloudflare.comdns@cloudflare.com serial=2399062774

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=1774378036

Same first word

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DNS History

11 records (7 active, 4 former)

NSivan.ns.cloudflare.comkay.ns.cloudflare.comMXmail2.orcan.ukA104.21.83.144172.67.177.1122606:4700:3032::ac43:b1702606:4700:3033::6815:5390188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NSivan.ns.cloudflare.com2026-02-21 → 2026-03-24 · 2 obs
● 2026-02-21 20:30:46
● 2026-03-24 19:08:46
●NSkay.ns.cloudflare.com2026-02-21 → 2026-03-24 · 2 obs
● 2026-02-21 20:30:46
● 2026-03-24 19:08:46
●MXmail2.orcan.uk2026-02-21 → 2026-03-24 · 2 obs
● 2026-02-21 20:30:46
● 2026-03-24 19:08:46
●A104.21.83.1442026-03-24 → 2026-03-24 · 3 obs
○ 2026-02-21 20:30:46
● 2026-03-24 19:08:44
● 2026-03-24 19:08:46
●A172.67.177.1122026-03-24 → 2026-03-24 · 3 obs
○ 2026-02-21 20:30:46
● 2026-03-24 19:08:44
● 2026-03-24 19:08:46
○A188.114.96.02026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 20:30:46
○ 2026-03-24 19:08:44
○ 2026-03-24 19:08:46
○A188.114.97.02026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 20:30:46
○ 2026-03-24 19:08:44
○ 2026-03-24 19:08:46
●A2606:4700:3032::ac43:b1702026-03-24 → 2026-03-24 · 3 obs
○ 2026-02-21 20:30:46
● 2026-03-24 19:08:44
● 2026-03-24 19:08:46
●A2606:4700:3033::6815:53902026-03-24 → 2026-03-24 · 3 obs
○ 2026-02-21 20:30:46
● 2026-03-24 19:08:44
● 2026-03-24 19:08:46
○A2a06:98c1:3120::2026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 20:30:46
○ 2026-03-24 19:08:44
○ 2026-03-24 19:08:46
○A2a06:98c1:3121::2026-02-21 → 2026-02-21 · 3 obs
● 2026-02-21 20:30:46
○ 2026-03-24 19:08:44
○ 2026-03-24 19:08:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz-
grcs.czkay.ns.cloudflare.com, ivan.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.120

NS records: kay.ns.cloudflare.com, ivan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for grcs.cz (unsigned zone)

⏱️ Timing

Total: 1146ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.83.144, 172.67.177.112
AAAA22606:4700:3033::6815:5390, 2606:4700:3032::ac43:b170
NS2ivan.ns.cloudflare.com, kay.ns.cloudflare.com
MX1mail2.orcan.uk (pri: 10)
TXT1v=spf1 a:pmg2.orcan.uk a:pmg3.orcan.uk -
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1ivan.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

Four IP numbers are pointed to by grcs.cz: 2606:4700:3032::ac43:b170, 2606:4700:3033::6815:5390, 104.21.83.144 and 172.67.177.112.

other host names including girolstein.de, archicool.com, sora2.com, furryteaparty.com and gennitries-larissas.gr share IP numbers with grcs.cz.

Name Servers

grcs.cz is delegated to two name servers ivan.ns.cloudflare.com and kay.ns.cloudflare.com.

grcs.cz shares the same name server setup as other domains, for instance jiccharleston.com, lorcanfawks.de, airbnbinthetropics.com.au, aenergy.ca and bittickdesigns.com.

grcs.cz at least partially shares name servers with other domains, for instance utexas-edu.pp.ua, blokesundies.co.uk, merrychristmasholly.com, popprinter.com and veinitalia.com.

These name servers are commonly used alongside eric.ns.cloudflare.com and celine.ns.cloudflare.com.

Host names with six IP numbers:

Host name ivan.ns.cloudflare.com points to: 2606:4700:58::adf5:3b78, 2803:f800:50::6ca2:c178, 2a06:98c1:50::ac40:2178, 108.162.193.120, 172.64.33.120 and 173.245.59.120.

Host name kay.ns.cloudflare.com points to: 2606:4700:50::adf5:3a7d, 2803:f800:50::6ca2:c07d, 2a06:98c1:50::ac40:207d, 108.162.192.125, 172.64.32.125 and 173.245.58.125.

Mail Servers

grcs.cz is handled by a single mail server, mail2.orcan.uk.

grcs.cz shares its mail server setup with other domains, including orcan.net and orcan.uk.