`antonintucapsky.com`

DNSSEC	⚠️ Not signed
A	3.65.102.101^{🇩🇪 Amazon3.64.0.0/12 EC2 FRA Prefix}
		PTR	`ec2-3-65-102-101.eu-central-1.compute.amazonaws.com`
A	3.71.253.221^{🇩🇪 Amazon3.64.0.0/12 EC2 FRA Prefix}
A	81.91.86.11^{🇨🇿 WEB4U81.91.80.0/21}
NS	`ns2.web4u.cz` ⭐
		A	2a02:a40:100:28ff::12^{🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U185.14.224.0/23}
			PTR	`ns.web4u.cz`
MX	`mx.web4u.cz` ⭐
		A	2001:1568::7012^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`mx.web4u.cz`
		A	81.91.87.12^{🇨🇿 WEB4U81.91.80.0/21}
			PTR	`mx.web4u.cz`
SOA	`ns.web4u.cz`admin@web4u.cz 2024-02-14 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1776060412

Same first word

antonintucapsky.com

DNS History

7 records (6 active, 1 former)

●NSns.web4u.cz2015-07-26 → 2026-04-13 · 2 obs

● 2015-07-26 00:25:34
● 2026-04-13 06:18:40

●NSns2.web4u.cz2015-07-26 → 2026-04-13 · 2 obs

● 2015-07-26 00:25:34
● 2026-04-13 06:18:40

○MXmail.antonintucapsky.com2015-07-26 → 2017-06-21 · 3 obs

● 2015-07-26 00:25:34
● 2017-06-21 01:25:14
○ 2026-04-13 06:18:40

●MXmx.web4u.cz2026-04-13 → 2026-04-13 · 2 obs

○ 2017-06-21 01:25:14
● 2026-04-13 06:18:40

●A3.65.102.1012026-04-13 → 2026-04-13 · 2 obs

○ 2015-07-26 00:25:34
● 2026-04-13 06:18:40

●A3.71.253.2212026-04-13 → 2026-04-13 · 2 obs

○ 2015-07-26 00:25:34
● 2026-04-13 06:18:40

●A81.91.86.112015-07-26 → 2026-04-13 · 2 obs

● 2015-07-26 00:25:34
● 2026-04-13 06:18:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
antonintucapsky.com	ns.web4u.cz, ns2.web4u.cz	-

✅ Authoritative Response

Server:85.207.53.12

NS records: ns.web4u.cz, ns2.web4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for antonintucapsky.com (unsigned zone)

⏱️ Timing

Total: 963ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`3.65.102.101, 3.71.253.221...`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	1	`mx.web4u.cz (pri: 10)`
SOA	1	`ns.web4u.cz admin.web4u.cz`

Analysis

IP Addresses

antonintucapsky.com points to three IPs: 3.65.102.101, 3.71.253.221 and 81.91.86.11.

other host names including derweinscout.de, marsat.cz, erecom.sk, lotta-fra-brakmakergata.com and chapel.cz share IP numbers with antonintucapsky.com.

Name Servers

antonintucapsky.com is delegated to two name servers ns2.web4u.cz and ns.web4u.cz.

antonintucapsky.com shares the same name server setup as other domains, for instance idbios.com, autokalny.cz, kaczi.cz, syncros.cz and kulturasusice.cz.

Host names with two IP numbers:

The host name ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12; the host name ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.

Mail Servers

antonintucapsky.com is handled by a single mail server, mx.web4u.cz.

antonintucapsky.com shares the same mail server setup as other domains, for instance metv.cz, chren.cz, inwebio.net, 1-(0x706f726e)o.eu and pyroexpert.cz.

antonintucapsky.com shares at least some mail servers with other domains, including elubra.cz, ssrkunice.cz, biza.info and upgates.sk.

these mail servers are often used alongside aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.

mx.web4u.cz resolves to two IP numbers: 2001:1568::7012 and 81.91.87.12.

antonintucapsky.com - robtex.com