`o2extra.com`

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 2017-11-20 #3

`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=1776130282

Same first word

o2extra.eu

o2extra.sk

o2extra.cz

o2extra.com

DNS History

6 records (3 active, 3 former)

●NSdns.iol.cz2008-03-10 → 2026-04-14 · 2 obs

● 2008-03-10 19:35:12
● 2026-04-14 01:41:50

●NSns2.tel.cz2008-03-10 → 2026-04-14 · 2 obs

● 2008-03-10 19:35:12
● 2026-04-14 01:41:50

○MXrelay.iol.cz2008-03-10 → 2008-03-10 · 3 obs

● 2008-03-10 19:35:12
○ 2015-05-12 03:49:22
○ 2026-04-14 01:41:50

○MXsmtp-in.iol.cz2008-03-10 → 2008-03-10 · 3 obs

● 2008-03-10 19:35:12
○ 2015-05-12 03:49:22
○ 2026-04-14 01:41:50

●A160.218.161.1572026-03-27 → 2026-04-14 · 3 obs

○ 2017-08-31 04:57:38
● 2026-03-27 12:15:42
● 2026-04-14 01:41:50

○A160.218.161.372015-05-12 → 2017-08-31 · 5 obs

○ 2008-03-10 19:35:12
● 2015-05-12 03:49:22
● 2017-08-31 04:57:38
○ 2026-03-27 12:15:42
○ 2026-04-14 01:41:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
o2extra.com	dns.iol.cz, ns2.tel.cz	-

✅ Authoritative Response

Server:194.228.2.61

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for o2extra.com (unsigned zone)

⏱️ Timing

Total: 806ms | Queries: -

📄 Records

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

Analysis

IP Addresses

o2extra.com points to an IP address: 160.218.161.157.

other host names include o2extrapark.com, o2extra.cz, o2extrapark.cz, o2extravyhody.com and o2extra.eu; they share IP numbers with o2extra.com.

Name Servers

Two name servers dns.iol.cz and ns2.tel.cz handle the delegation for o2extra.com.

o2extra.com shares the same name server setup as other domains, for instance 208.177.90.in-addr.arpa, 151.197.217.in-addr.arpa, 80.208.83.in-addr.arpa, 177.102.88.in-addr.arpa and 236.70.85.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.

o2extra.com - robtex.com

o2extra.com

com