basicblock.cz - robtex.com

basicblock.cz

DNSSEC🔒 Signed (DS record present)
A2606:4700:3035::ac43:9267🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:295f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.41.95Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.146.103🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSfrida.ns.cloudflare.com ⭐
A2606:4700:50::a29f:2689🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRfrida.ns.cloudflare.com
A2803:f800:50::6ca2:c289🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRfrida.ns.cloudflare.com
A2a06:98c1:50::ac40:2289🇺🇸 Cloudflare2a06:98c1:50::/45
PTRfrida.ns.cloudflare.com
A108.162.194.137🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRfrida.ns.cloudflare.com
A162.159.38.137Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRfrida.ns.cloudflare.com
A172.64.34.137🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRfrida.ns.cloudflare.com
NSporter.ns.cloudflare.com
A2606:4700:58::a29f:2cf3🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRporter.ns.cloudflare.com
A2803:f800:50::6ca2:c3f3🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRporter.ns.cloudflare.com
A2a06:98c1:50::ac40:23f3🇺🇸 Cloudflare2a06:98c1:50::/45
PTRporter.ns.cloudflare.com
A108.162.195.243🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRporter.ns.cloudflare.com
A162.159.44.243Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRporter.ns.cloudflare.com
A172.64.35.243🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRporter.ns.cloudflare.com
MX13cd5b20a511037e.mx2.emailprofi.seznam.cz ⭐
A2a02:598:2::1146🇨🇿 SEZNAM-CZ2a02:598:2::/48
PTRwildcard.mx2.emailprofi.seznam.cz
A77.75.77.146🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III
PTRwildcard.mx2.emailprofi.seznam.cz
MX13cd5b20a511037e.mx1.emailprofi.seznam.cz(20)
A2a02:598:2::1056🇨🇿 SEZNAM-CZ2a02:598:2::/48
PTRwildcard.mx1.emailprofi.seznam.cz
A77.75.77.56🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III
PTRwildcard.mx1.emailprofi.seznam.cz
TXTv=spf1 include:spf.seznam.cz -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.41.95, 172.67.146.103
IPv62606:4700:3035::ac43:9267, 2606:4700:3037::6815:295f
SOAfrida.ns.cloudflare.comdns@cloudflare.com serial=2399598523

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=1774540035
🔒 HSTS Preload (+subdomains)

Same first word

basicblock.cz
basicblock.com

DNS History

8 records (8 active, 0 former)

NSfrida.ns.cloudflare.comporter.ns.cloudflare.comMX13cd5b20a511037e.mx1.emailprofi.seznam.cz13cd5b20a511037e.mx2.emailprofi.seznam.czA104.21.41.95172.67.146.1032606:4700:3035::ac43:92672606:4700:3037::6815:295f
●NSfrida.ns.cloudflare.com2026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●NSporter.ns.cloudflare.com2026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●MX13cd5b20a511037e.mx1.emailprofi.seznam.cz2026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●MX13cd5b20a511037e.mx2.emailprofi.seznam.cz2026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●A104.21.41.952026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●A172.67.146.1032026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●A2606:4700:3035::ac43:92672026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32
●A2606:4700:3037::6815:295f2026-03-16 → 2026-03-26 · 2 obs
● 2026-03-16 07:28:20
● 2026-03-26 16:12:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
basicblock.czfrida.ns.cloudflare.com, porter.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.35.243

NS records: frida.ns.cloudflare.com, porter.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 999ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.146.103, 104.21.41.95
AAAA22606:4700:3035::ac43:9267, 2606:4700:3037::6815:295f
NS2frida.ns.cloudflare.com, porter.ns.cloudflare.com
MX213cd5b20a511037e.mx2.emailprofi.seznam.c, 13cd5b20a511037e.mx1.emailprofi.seznam.c
TXT1v=spf1 include:spf.seznam.cz -all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1frida.ns.cloudflare.com dns.cloudflare.c

Analysis

IP Addresses

basicblock.cz refers to four IP numbers: 2606:4700:3035::ac43:9267, 2606:4700:3037::6815:295f, 104.21.41.95 and 172.67.146.103.

Other host names, for instance andrewmallett.net, autousabing.com, www.ahtarirtv.ru, scutece.md and omp-adguard.pro share IP numbers with basicblock.cz.

Name Servers

basicblock.cz's delegation uses two name servers: frida.ns.cloudflare.com and porter.ns.cloudflare.com.

basicblock.cz uses the same name server setup as other domains, such as bliznovice.cz, alconit.gr, cconsulting.gr, ryanbitcoin.com and michaelkupietz.com.

basicblock.cz at least partially shares name servers with other domains, including mxfwdredir.com, playariagame.com, williamwordantiques.com, monad-mon.exchange and myreviewsite.net.

These name servers are commonly used with anton.ns.cloudflare.com.

Host names with six IP numbers:

frida.ns.cloudflare.com points to 2606:4700:50::a29f:2689, 2803:f800:50::6ca2:c289, 2a06:98c1:50::ac40:2289, 108.162.194.137, 162.159.38.137 and 172.64.34.137.

porter.ns.cloudflare.com points to 2606:4700:58::a29f:2cf3, 2803:f800:50::6ca2:c3f3, 2a06:98c1:50::ac40:23f3, 108.162.195.243, 162.159.44.243 and 172.64.35.243.

Mail Servers

basicblock.cz is served by two mail servers 13cd5b20a511037e.mx1.emailprofi.seznam.cz and 13cd5b20a511037e.mx2.emailprofi.seznam.cz.

Host names with two IPs:

13cd5b20a511037e.mx1.emailprofi.seznam.cz points to 2a02:598:2::1056 and 77.75.77.56

13cd5b20a511037e.mx2.emailprofi.seznam.cz points to 2a02:598:2::1146 and 77.75.77.146