`ethermtz.cz`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:2a87^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:ce1a^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.42.135^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.206.26^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`byron.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c43^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c343^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`byron.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2343^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`byron.ns.cloudflare.com`
		A	108.162.195.67^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	162.159.44.67^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	172.64.35.67^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
NS	`margaret.ns.cloudflare.com`
		A	2606:4700:50::a29f:266b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`margaret.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c26b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`margaret.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:226b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`margaret.ns.cloudflare.com`
		A	108.162.194.107^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`margaret.ns.cloudflare.com`
		A	162.159.38.107^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`margaret.ns.cloudflare.com`
		A	172.64.34.107^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`margaret.ns.cloudflare.com`
MX	`posta.ethermtz.cz` ⭐
		A	185.40.82.4^{🇨🇿 GRAPESC-ISP185.40.80.0/22}
			PTR	`posta.ethermtz.cz`
TXT	`MS=ms83040751`
TXT	`anthropic-domain-verification-x5m3az=bLBXZuwSJLgb4vgpH4AI2lwEf`
TXT	`autodesk-domain-verification=gO0kgXI5tuQqebnDcQ1N`
TXT	`google-site-verification=k2FIsMCFSDfYt04bbBQf5iqNW8Exq5p_DdkY(0x664150)Uu5c`
TXT	`openai-domain-verification=dv-3OxQiSyuZVmkvqL4jiqbvfGA`
TXT	`v=spf1 a:posta.ethermtz.cz ip4:185.40.82.4 ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.42.135, 172.67.206.26
		IPv6 hints	2606:4700:3031::6815:2a87, 2606:4700:3033::ac43:ce1a
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=77, name=cloudflare-ech.com
SOA	`byron.ns.cloudflare.com`dns@cloudflare.com serial=2402548155

`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=1777090635

WOT: SAFE (61/100)

Subdomains

posta.ethermtz.cz

Same first word

ethermtz.cz

DNS History

11 records (7 active, 4 former)

●NSbyron.ns.cloudflare.com2026-04-09 → 2026-04-25 · 3 obs

○ 2019-03-21 10:58:24
● 2026-04-09 08:12:52
● 2026-04-25 04:55:54

○NSktnet.airweb.cz2015-07-10 → 2019-03-21 · 4 obs

● 2015-07-10 02:49:04
● 2019-03-21 10:58:24
○ 2026-04-09 08:12:52
○ 2026-04-25 04:55:54

●NSmargaret.ns.cloudflare.com2026-04-09 → 2026-04-25 · 3 obs

○ 2019-03-21 10:58:24
● 2026-04-09 08:12:52
● 2026-04-25 04:55:54

○NSns2.airweb.cz2015-07-10 → 2019-03-21 · 4 obs

● 2015-07-10 02:49:04
● 2019-03-21 10:58:24
○ 2026-04-09 08:12:52
○ 2026-04-25 04:55:54

●MXposta.ethermtz.cz2015-07-10 → 2026-04-25 · 2 obs

● 2015-07-10 02:49:04
● 2026-04-25 04:55:54

●A104.21.42.1352026-04-09 → 2026-04-25 · 3 obs

○ 2019-03-21 10:58:24
● 2026-04-09 08:12:52
● 2026-04-25 04:55:54

○A151.80.91.1112019-03-21 → 2019-03-21 · 4 obs

○ 2017-02-16 11:12:22
● 2019-03-21 10:58:24
○ 2026-04-09 08:12:52
○ 2026-04-25 04:55:54

●A172.67.206.262026-04-09 → 2026-04-25 · 3 obs

○ 2019-03-21 10:58:24
● 2026-04-09 08:12:52
● 2026-04-25 04:55:54

●A2606:4700:3031::6815:2a872026-04-09 → 2026-04-25 · 3 obs

○ 2019-03-21 10:58:24
● 2026-04-09 08:12:52
● 2026-04-25 04:55:54

●A2606:4700:3033::ac43:ce1a2026-04-09 → 2026-04-25 · 3 obs

○ 2019-03-21 10:58:24
● 2026-04-09 08:12:52
● 2026-04-25 04:55:54

○A81.0.238.1052015-07-10 → 2017-02-16 · 4 obs

● 2015-07-10 02:49:04
● 2017-02-16 11:12:22
○ 2019-03-21 10:58:24
○ 2026-04-25 04:55:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	d.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz	-
ethermtz.cz	margaret.ns.cloudflare.com, byron.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.67

NS records: margaret.ns.cloudflare.com, byron.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ethermtz.cz (unsigned zone)

⏱️ Timing

Total: 579ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.206.26, 104.21.42.135`
AAAA	2	`2606:4700:3033::ac43:ce1a, 2606:4700:3031::6815:2a87`
NS	2	`byron.ns.cloudflare.com, margaret.ns.cloudflare.com`
MX	1	`posta.ethermtz.cz (pri: 10)`
TXT	6	`MS=ms83040751, anthropic-domain-verification-x5m3az=bLB...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`byron.ns.cloudflare.com dns.cloudflare.c`

Analysis

Hierarchy

ethermtz.cz is the parent of posta.ethermtz.cz.

IP Addresses

ethermtz.cz points to four IP numbers: 2606:4700:3031::6815:2a87, 2606:4700:3033::ac43:ce1a, 104.21.42.135 and 172.67.206.26.

Other host names including remote.bauschweiz.ch, pokkisam.com, mockingbirdstation.com, throttleoctane.com and (0x787878)moviesforyou.com share IP numbers with ethermtz.cz.

Name Servers

ethermtz.cz's delegation uses two name servers, byron.ns.cloudflare.com and margaret.ns.cloudflare.com.

ethermtz.cz shares the same name server setup as other domains, for example yos777.net, necron.ch, biotrop.org, necron.com and ratupandan.click.

ethermtz.cz at least partially shares name servers with other domains, including saab.uk.com, powers-realty.com, emilysellsoc.com, andrewpaulshouse.com and gracehomes.com.

These name servers are commonly used with amy.ns.cloudflare.com and armfazh.ns.cloudflare.com.

Host names with six IP numbers:

byron.ns.cloudflare.com points to: 2606:4700:58::a29f:2c43, 2803:f800:50::6ca2:c343, 2a06:98c1:50::ac40:2343, 108.162.195.67, 162.159.44.67 and 172.64.35.67.

margaret.ns.cloudflare.com points to: 2606:4700:50::a29f:266b, 2803:f800:50::6ca2:c26b, 2a06:98c1:50::ac40:226b, 108.162.194.107, 162.159.38.107 and 172.64.34.107.

Mail Servers

ethermtz.cz is handled by a single mail server, posta.ethermtz.cz.

posta.ethermtz.cz points to a single IP: 185.40.82.4.

ethermtz.cz - robtex.com

ethermtz.cz

cz

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`ethermtz.cz`

`cz`