🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`techstack.cz`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:a5db^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:42ec^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.66.236^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.165.219^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`lila.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3aba^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0ba^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lila.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20ba^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lila.ns.cloudflare.com`
		A	108.162.192.186^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
		A	172.64.32.186^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
		A	173.245.58.186^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lila.ns.cloudflare.com`
NS	`newt.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bd4^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`newt.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1d4^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`newt.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21d4^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`newt.ns.cloudflare.com`
		A	108.162.193.212^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`newt.ns.cloudflare.com`
		A	172.64.33.212^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`newt.ns.cloudflare.com`
		A	173.245.59.212^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`newt.ns.cloudflare.com`
MX	`9f60c5fb6a2aca2c.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	`9f60c5fb6a2aca2c.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	`atlassian-domain-verification=vWMJU1IH5PaIP0i3L7mM9AbPfCnBLIhLIRLaopMVY62y2KF...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.66.236, 172.67.165.219
		IPv6 hints	2606:4700:3031::ac43:a5db, 2606:4700:3034::6815:42ec
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=233, name=cloudflare-ech.com
SOA	`lila.ns.cloudflare.com`dns@cloudflare.com serial=2413027682

`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=1788396443

Same first word

Similar names

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DNS History

12 records (8 active, 4 former)

●NSlila.ns.cloudflare.com2026-09-02 → 2026-09-03 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-03 00:55:22

●NSnewt.ns.cloudflare.com2026-09-02 → 2026-09-03 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-03 00:55:22

●MX9f60c5fb6a2aca2c.mx1.emailprofi.seznam.cz2026-09-02 → 2026-09-03 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-03 00:55:22

●MX9f60c5fb6a2aca2c.mx2.emailprofi.seznam.cz2026-09-02 → 2026-09-03 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-03 00:55:22

●A104.21.66.2362026-09-02 → 2026-09-03 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-03 00:55:22

●A172.67.165.2192026-09-02 → 2026-09-03 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-03 00:55:22

○A188.114.96.02026-09-02 → 2026-09-02 · 3 obs

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-03 00:55:22

○A188.114.97.02026-09-02 → 2026-09-02 · 3 obs

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-03 00:55:22

●A2606:4700:3031::ac43:a5db2026-09-02 → 2026-09-03 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-03 00:55:22

●A2606:4700:3034::6815:42ec2026-09-02 → 2026-09-03 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-03 00:55:22

○A2a06:98c1:3120::2026-09-02 → 2026-09-02 · 3 obs

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-03 00:55:22

○A2a06:98c1:3121::2026-09-02 → 2026-09-02 · 3 obs

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-03 00:55:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
techstack.cz	newt.ns.cloudflare.com, lila.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.212

NS records: newt.ns.cloudflare.com, lila.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for techstack.cz (unsigned zone)

⏱️ Timing

Total: 973ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.66.236, 172.67.165.219`
AAAA	2	`2606:4700:3031::ac43:a5db, 2606:4700:3034::6815:42ec`
NS	2	`lila.ns.cloudflare.com, newt.ns.cloudflare.com`
MX	2	`9f60c5fb6a2aca2c.mx2.emailprofi.seznam.c, 9f60c5fb6a2aca2c.mx1.emailprofi.seznam.c`
TXT	1	`atlassian-domain-verification=vWMJU1IH5P`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`lila.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

techstack.cz directs to four IP numbers, which are 104.21.66.236, 172.67.165.219, 2606:4700:3031::ac43:a5db and 2606:4700:3034::6815:42ec.

blshouse.com, nanhonghj.com, stellar-transition.music and two other host names share IP numbers with techstack.cz.

Name Servers

The NS records for techstack.cz delegate to lila.ns.cloudflare.com and newt.ns.cloudflare.com.

techstack.cz uses the same name servers as several other domains — among them 1928591863.workers.dev, uscf.org, blackant.io and two more.

There is at least partial name server overlap between techstack.cz and other domains — doivesotrung.com, guoneiban.pages.dev, eaebooking.pages.dev and two more among them.

These name servers frequently co-occur with the name servers alina.ns.cloudflare.com and sam.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

lila.ns.cloudflare.com maps to 108.162.192.186, 172.64.32.186, 173.245.58.186 and 3 additional IP addresses.

newt.ns.cloudflare.com maps to 108.162.193.212, 172.64.33.212, 173.245.59.212 and 3 additional IP addresses.

Mail Servers

Mail for techstack.cz is handled by two mail servers — 9f60c5fb6a2aca2c.mx1.emailprofi.seznam.cz and 9f60c5fb6a2aca2c.mx2.emailprofi.seznam.cz.

9f60c5fb6a2aca2c.mx1.emailprofi.seznam.cz resolves to 77.75.77.56 and 2a02:598:2::1056. Likewise, 9f60c5fb6a2aca2c.mx2.emailprofi.seznam.cz resolves to 77.75.77.146 and 2a02:598:2::1146 — two IP addresses apiece.

techstack.cz - robtex.com

techstack.cz

cz

Same first word

Similar names

Previous names

Next names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`techstack.cz`

`cz`