`hasici-elearning.cz`

DNSSEC	🔒 Signed (DS record present)
A	213.195.202.163^{🇨🇿 HA-VEL-LOCAL-AS213.195.192.0/18 ha-vel internet s.r.o.}
		PTR	`oldsospofm.ha-vel.cz`
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	`hasicielearning-cz01e.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::8^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db5pr02cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::f^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00507.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am3pr04cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::c^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as8pr05cu00304.inbound.protection.outlook.com`
		A	52.101.68.10^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dbbpr03cu00102.inbound.protection.outlook.com`
		A	52.101.68.36^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db5pr02cu00104.inbound.protection.outlook.com`
		A	52.101.73.12^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am4pr0401cu00104.inbound.protection.outlook.com`
		A	52.101.73.15^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
MX	`mail.hasici-elearning.cz`⁽¹⁰⁾
		A	213.195.202.163^{🇨🇿 HA-VEL-LOCAL-AS213.195.192.0/18 ha-vel internet s.r.o.}
			PTR	`oldsospofm.ha-vel.cz`
TXT	`MS=ms98906327`
TXT	`jn66gf4f63kgfhd280z5hq806cy2cy2q`
TXT	`v=spf1 a mx ip4:81.30.225.246 include:spf.protection.outlook.com -all include...`
SOA	`ns.web4u.cz`admin@web4u.cz 2026-02-02 #5

`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=1781367435

Subdomains

mail.hasici-elearning.cz

lms.hasici-elearning.cz

Same first word

hasici-elearning.cz

DNS History

5 records (5 active, 0 former)

●NSns.web4u.cz2026-05-09 → 2026-06-13 · 2 obs

● 2026-05-09 17:10:20
● 2026-06-13 16:58:28

●NSns2.web4u.cz2026-05-09 → 2026-06-13 · 2 obs

● 2026-05-09 17:10:20
● 2026-06-13 16:58:28

●MXhasicielearning-cz01e.mail.protection.outlook.com2026-05-09 → 2026-06-13 · 2 obs

● 2026-05-09 17:10:20
● 2026-06-13 16:58:28

●MXmail.hasici-elearning.cz2026-05-09 → 2026-06-13 · 2 obs

● 2026-05-09 17:10:20
● 2026-06-13 16:58:28

●A213.195.202.1632026-05-09 → 2026-06-13 · 2 obs

● 2026-05-09 17:10:20
● 2026-06-13 16:58:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
hasici-elearning.cz	ns.web4u.cz, ns2.web4u.cz	4 records

✅ Authoritative Response

Server:185.14.224.241

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1026ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`213.195.202.163`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	2	`hasicielearning-cz01e.mail.protection.ou, mail.hasici-elearning.cz (pri: 10)`
TXT	3	`MS=ms98906327, jn66gf4f63kgfhd280z5hq806cy2cy2q...`
SOA	1	`ns.web4u.cz admin.web4u.cz`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns.web4u.cz, ns2.web4u.cz, ns.web4u.cz...)

Analysis

Hierarchy

hasici-elearning.cz is the parent domain of mail.hasici-elearning.cz and lms.hasici-elearning.cz.

IP Addresses

hasici-elearning.cz points to a single IP number: 213.195.202.163.

Host names such as oldsospofm.ha-vel.cz and mail.hasici-elearning.cz share IP numbers with hasici-elearning.cz.

Name Servers

hasici-elearning.cz is delegated to two name servers: ns2.web4u.cz and ns.web4u.cz.

hasici-elearning.cz shares its name server setup with other domains, including amhk.cz, prokysek.cz, tc101.cz and two others.

ns2.web4u.cz and ns.web4u.cz each resolve to two IP addresses: ns2.web4u.cz points to 85.207.53.12 and 2a02:a40:100:28ff::12, while ns.web4u.cz points to 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

hasici-elearning.cz has two mail servers: mail.hasici-elearning.cz and hasicielearning-cz01e.mail.protection.outlook.com.

Host names with 8 IP numbers:

hasicielearning-cz01e.mail.protection.outlook.com resolves to 52.101.68.10, 52.101.68.36, 52.101.73.12 and 5 other IP addresses.

Host names with one IP number:

mail.hasici-elearning.cz points to 213.195.202.163.

hasici-elearning.cz - robtex.com