basicblock.cz - dns.ninja

`basicblock.cz`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3031::ac43:9267^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::6815:295f^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.41.95^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.103^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`frida.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2689^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`frida.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c289^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`frida.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2289^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`frida.ns.cloudflare.com`
		A	108.162.194.137^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`frida.ns.cloudflare.com`
		A	162.159.38.137^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`frida.ns.cloudflare.com`
		A	172.64.34.137^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`frida.ns.cloudflare.com`
NS	`porter.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cf3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`porter.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3f3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`porter.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23f3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`porter.ns.cloudflare.com`
		A	108.162.195.243^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`porter.ns.cloudflare.com`
		A	162.159.44.243^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`porter.ns.cloudflare.com`
		A	172.64.35.243^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`porter.ns.cloudflare.com`
MX	`13cd5b20a511037e.mx2.emailprofi.seznam.cz` ⭐
		A	2a02:598:2::1146^{🇨🇿 SEZNAM-CZ2a02:598:2::/48}
			PTR	`wildcard.mx2.emailprofi.seznam.cz`
		A	77.75.77.146^{🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III}
			PTR	`wildcard.mx2.emailprofi.seznam.cz`
MX	`13cd5b20a511037e.mx1.emailprofi.seznam.cz`⁽²⁰⁾
		A	2a02:598:2::1056^{🇨🇿 SEZNAM-CZ2a02:598:2::/48}
			PTR	`wildcard.mx1.emailprofi.seznam.cz`
		A	77.75.77.56^{🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III}
			PTR	`wildcard.mx1.emailprofi.seznam.cz`
TXT	`google-site-verification=yOn9daueXDycsHKA0OiKEHtdMUsSVoYovTMhd7kFwDQ`
TXT	`v=spf1 include:spf.seznam.cz -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.41.95, 172.67.146.103
		IPv6 hints	2606:4700:3031::ac43:9267, 2606:4700:3032::6815:295f
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=251, name=cloudflare-ech.com
SOA	`frida.ns.cloudflare.com`dns@cloudflare.com serial=2412040137

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1786681039

🔒 HSTS Preload (+subdomains)

Same first word

basicblock.ai

basicblock.cz

basicblock.com

DNS History

14 records (8 active, 6 former)

●NSfrida.ns.cloudflare.com2026-03-16 → 2026-08-14 · 2 obs

● 2026-03-16 07:28:20
● 2026-08-14 05:34:38

●NSporter.ns.cloudflare.com2026-03-16 → 2026-08-14 · 2 obs

● 2026-03-16 07:28:20
● 2026-08-14 05:34:38

●MX13cd5b20a511037e.mx1.emailprofi.seznam.cz2026-03-16 → 2026-08-14 · 2 obs

● 2026-03-16 07:28:20
● 2026-08-14 05:34:38

●MX13cd5b20a511037e.mx2.emailprofi.seznam.cz2026-03-16 → 2026-08-14 · 2 obs

● 2026-03-16 07:28:20
● 2026-08-14 05:34:38

●A104.21.41.952026-03-16 → 2026-08-14 · 3 obs

● 2026-03-16 07:28:20
○ 2026-08-08 06:58:58
● 2026-08-14 05:34:38

●A172.67.146.1032026-03-16 → 2026-08-14 · 3 obs

● 2026-03-16 07:28:20
○ 2026-08-08 06:58:58
● 2026-08-14 05:34:38

○A188.114.96.02026-08-08 → 2026-08-08 · 3 obs

○ 2026-07-19 14:46:20
● 2026-08-08 06:58:58
○ 2026-08-14 05:34:38

○A188.114.97.02026-08-08 → 2026-08-08 · 3 obs

○ 2026-07-19 14:46:20
● 2026-08-08 06:58:58
○ 2026-08-14 05:34:38

●A2606:4700:3031::ac43:92672026-07-19 → 2026-08-14 · 4 obs

○ 2026-05-19 09:43:56
● 2026-07-19 14:46:20
○ 2026-08-08 06:58:58
● 2026-08-14 05:34:38

●A2606:4700:3032::6815:295f2026-07-19 → 2026-08-14 · 4 obs

○ 2026-05-19 09:43:56
● 2026-07-19 14:46:20
○ 2026-08-08 06:58:58
● 2026-08-14 05:34:38

○A2606:4700:3035::ac43:92672026-03-16 → 2026-05-19 · 4 obs

● 2026-03-16 07:28:20
● 2026-05-19 09:43:56
○ 2026-07-19 14:46:20
○ 2026-08-14 05:34:38

○A2606:4700:3037::6815:295f2026-03-16 → 2026-05-19 · 4 obs

● 2026-03-16 07:28:20
● 2026-05-19 09:43:56
○ 2026-07-19 14:46:20
○ 2026-08-14 05:34:38

○A2a06:98c1:3120::2026-08-08 → 2026-08-08 · 3 obs

○ 2026-07-19 14:46:20
● 2026-08-08 06:58:58
○ 2026-08-14 05:34:38

○A2a06:98c1:3121::2026-08-08 → 2026-08-08 · 3 obs

○ 2026-07-19 14:46:20
● 2026-08-08 06:58:58
○ 2026-08-14 05:34:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	8 records
basicblock.cz	frida.ns.cloudflare.com, porter.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.243

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: 1392ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.41.95, 172.67.146.103`
AAAA	2	`2606:4700:3032::6815:295f, 2606:4700:3031::ac43:9267`
NS	2	`frida.ns.cloudflare.com, porter.ns.cloudflare.com`
MX	2	`13cd5b20a511037e.mx2.emailprofi.seznam.c, 13cd5b20a511037e.mx1.emailprofi.seznam.c`
TXT	2	`google-site-verification=yOn9daueXDycsHK, v=spf1 include:spf.seznam.cz -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`frida.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz...)

Analysis

IP Addresses

basicblock.cz points to the four IP addresses 104.21.41.95, 172.67.146.103, 2606:4700:3031::ac43:9267 and 2606:4700:3032::6815:295f.

Two other host names, along with www.kolumbclub.ru, www.ahtarirtv.ru and scutece.md, also share IP numbers with basicblock.cz.

Name Servers

basicblock.cz is delegated to two name servers: frida.ns.cloudflare.com and porter.ns.cloudflare.com.

basicblock.cz shares its NS records with other domains, for example bliznovice.cz, alconit.gr, cconsulting.gr and two others.

At least some of basicblock.cz's name servers are shared with other domains, for example roofersgladstonemo.com, ebonyhottube.com, mxfwdredir.com and two more.

It is common for these name servers to be used in conjunction with the name servers anton.ns.cloudflare.com, miki.ns.cloudflare.com and julio.ns.cloudflare.com.

DNS names with 6 IP addresses:

frida.ns.cloudflare.com resolves to 108.162.194.137, 162.159.38.137, 172.64.34.137 and 3 other IP addresses.

porter.ns.cloudflare.com resolves to 108.162.195.243, 162.159.44.243, 172.64.35.243 and 3 other IP addresses.

Mail Servers

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

13cd5b20a511037e.mx1.emailprofi.seznam.cz and 13cd5b20a511037e.mx2.emailprofi.seznam.cz each resolve to two IP addresses: 13cd5b20a511037e.mx1.emailprofi.seznam.cz points to 77.75.77.56 and 2a02:598:2::1056, while 13cd5b20a511037e.mx2.emailprofi.seznam.cz points to 77.75.77.146 and 2a02:598:2::1146.