`o2extrapark.cz`

DNSSEC	⚠️ Not signed
A	160.218.161.157^{🇨🇿 O2-CZECH-REPUBLIC160.218.0.0/16 Route object of Eurotel Praha}
		PTR	`160-218-161-157.rea.o2.cz`
NS	`dns.iol.cz` ⭐
		A	2a00:1028:100:102::61^{🇨🇿 O2-CZECH-REPUBLIC2a00:1028::/32 O2 CZ}
			PTR	`dns.iol.cz`
		A	194.228.2.61^{🇨🇿 O2-CZECH-REPUBLIC194.228.0.0/17 CZ.CZNET}
			PTR	`dns.iol.cz`
NS	`ns2.tel.cz`
		A	2a00:1028:1:205::2^{🇨🇿 O2-CZECH-REPUBLIC2a00:1028::/32 O2 CZ}
			PTR	`ns2.tel.cz`
		A	194.228.2.1^{🇨🇿 O2-CZECH-REPUBLIC194.228.0.0/17 CZ.CZNET}
			PTR	`ns2.tel.cz`
SOA	`dns.iol.cz`hostmaster@iol.cz 2017-11-27 #1

`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=1776138457

Same first word

o2extrapark.com

o2extrapark.cz

DNS History

4 records (3 active, 1 former)

●NSdns.iol.cz2015-08-12 → 2026-04-14 · 2 obs

● 2015-08-12 17:46:32
● 2026-04-14 04:08:18

●NSns2.tel.cz2015-08-12 → 2026-04-14 · 2 obs

● 2015-08-12 17:46:32
● 2026-04-14 04:08:18

●A160.218.161.1572026-04-10 → 2026-04-14 · 3 obs

○ 2017-04-06 12:21:46
● 2026-04-10 04:43:02
● 2026-04-14 04:08:18

○A160.218.161.372015-08-12 → 2017-04-06 · 4 obs

● 2015-08-12 17:46:32
● 2017-04-06 12:21:46
○ 2026-04-10 04:43:02
○ 2026-04-14 04:08:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
o2extrapark.cz	dns.iol.cz, ns2.tel.cz	4 records

✅ Authoritative Response

Server:194.228.2.61

NS records: dns.iol.cz, ns2.tel.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for o2extrapark.cz (unsigned zone)

⏱️ Timing

Total: 955ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`160.218.161.157`
NS	2	`ns2.tel.cz, dns.iol.cz`
SOA	1	`dns.iol.cz hostmaster.iol.cz`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (dns.iol.cz, dns.iol.cz, ns2.tel.cz...)

Analysis

IP Addresses

o2extrapark.cz points to a single IP number: 160.218.161.157.

other host names for instance o2extrapark.com, o2extra.cz, o2extravyhody.com, o2extra.com and o2extra.eu share IP numbers with o2extrapark.cz.

Name Servers

o2extrapark.cz is delegated to two name servers: dns.iol.cz and ns2.tel.cz.

o2extrapark.cz shares the same name server setup as other domains, for example 27.71.85.in-addr.arpa, 207.100.88.in-addr.arpa, 64.241.94.in-addr.arpa, 143.182.90.in-addr.arpa and 248.177.90.in-addr.arpa.

Host names with two IP numbers:

dns.iol.cz points to 2a00:1028:100:102::61 and 194.228.2.61

ns2.tel.cz points to 2a00:1028:1:205::2 and 194.228.2.1

o2extrapark.cz - robtex.com

o2extrapark.cz

cz