techstack.cz - dns.ninja

🛡️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=15, 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=1788589045

Same first word

Similar names

Previous names

Next names

DNS History

12 records (8 active, 4 former)

●NSlila.ns.cloudflare.com2026-09-02 → 2026-09-05 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-05 07:02:04

●NSnewt.ns.cloudflare.com2026-09-02 → 2026-09-05 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-05 07:02:04

●MX9f60c5fb6a2aca2c.mx1.emailprofi.seznam.cz2026-09-02 → 2026-09-05 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-05 07:02:04

●MX9f60c5fb6a2aca2c.mx2.emailprofi.seznam.cz2026-09-02 → 2026-09-05 · 2 obs

● 2026-09-02 05:53:24
● 2026-09-05 07:02:04

●A104.21.66.2362026-09-02 → 2026-09-05 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-05 07:02:04

●A172.67.165.2192026-09-02 → 2026-09-05 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-05 07:02:04

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

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-05 07:02:04

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

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-05 07:02:04

●A2606:4700:3031::ac43:a5db2026-09-02 → 2026-09-05 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-05 07:02:04

●A2606:4700:3034::6815:42ec2026-09-02 → 2026-09-05 · 3 obs

○ 2026-09-02 05:53:24
● 2026-09-02 13:26:46
● 2026-09-05 07:02:04

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

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-05 07:02:04

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

● 2026-09-02 05:53:24
○ 2026-09-02 13:26:46
○ 2026-09-05 07:02:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	8 records
techstack.cz	lila.ns.cloudflare.com, newt.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.186

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for techstack.cz (unsigned zone)

⏱️ Timing

Total: 1649ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.165.219, 104.21.66.236`
AAAA	2	`2606:4700:3034::6815:42ec, 2606:4700:3031::ac43:a5db`
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`

📌 Glue Records Collected

Total: 8

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

Analysis

IP Addresses

techstack.cz has four IP addresses: 104.21.66.236, 172.67.165.219, 2606:4700:3031::ac43:a5db and 2606:4700:3034::6815:42ec.

blshouse.com, nanhonghj.com, lojaafya.com.br and two other host names share IP numbers with techstack.cz.

Name Servers

techstack.cz is delegated to two name servers: 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, minhanhhere.workers.dev, uscf.org and two more.

techstack.cz partially shares its NS delegation with several other domains, including doivesotrung.com, 1446a.com, guoneiban.pages.dev and two others.

These name servers are regularly seen alongside alina.ns.cloudflare.com and sam.ns.cloudflare.com as name servers.

Hostnames that resolve to 6 IP addresses:

lila.ns.cloudflare.com resolves to 108.162.192.186, 172.64.32.186, 173.245.58.186 and 3 other IP addresses.

newt.ns.cloudflare.com resolves to 108.162.193.212, 172.64.33.212, 173.245.59.212 and 3 other 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 and 9f60c5fb6a2aca2c.mx2.emailprofi.seznam.cz each resolve to two IP addresses: 9f60c5fb6a2aca2c.mx1.emailprofi.seznam.cz points to 77.75.77.56 and 2a02:598:2::1056, while 9f60c5fb6a2aca2c.mx2.emailprofi.seznam.cz points to 77.75.77.146 and 2a02:598:2::1146.