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o2.cz checked at 2025-12-29T17:53:24.841Z 251ms 81/81/81 100% R:10 allDone:true timedOut:false cfaller:9df2b778/12:03c0ab2c:20655:undefined

`o2.cz`

NS	`dns.iol.cz`
		A	2a00:1028:100:102::61^{🇨🇿 O2-CZECH-REPUBLIC}
			PTR	`dns.iol.cz`
		A	194.228.2.61^{🇨🇿 O2-CZECH-REPUBLIC}
			PTR	`dns.iol.cz`
MX	`smtp-in.o2.cz`
		A	2a00:1028:d:2963::106^{🇨🇿 O2-CZECH-REPUBLIC}
			PTR	`smtp-in.o2.cz`
		A	90.176.151.98^{🇨🇿 O2-CZECH-REPUBLIC}
			PTR	`smtp-in.o2.cz`
NS	`ns2.tel.cz`
		A	2a00:1028:1:205::2^{🇨🇿 O2-CZECH-REPUBLIC}
			PTR	`ns2.tel.cz`
		A	194.228.2.1^{🇨🇿 O2-CZECH-REPUBLIC}
			PTR	`ns2.tel.cz`
A	2001:41d8:1:742:2::2^{🇨🇿 O2-CZECH-REPUBLIC}
A	160.218.161.162^{🇨🇿 O2-CZECH-REPUBLIC}
		PTR	`www.o2.cz`

`cz`

	NS	`a.ns.nic.cz`
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`

rank #38886 globally
rank #98 in the tld
This domain "o2.cz" appears to be owned by O2, which is a telecommunications company. The ".cz" indicates that the website is based in or has connections to the Czech Republic. The company provides services such as mobile communications, fixed-line communications, and internet services.

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AI analysis

o2.cz is the parent of api-a-moje.o2.cz, bc01.o2.cz, rcc.o2.cz, cloud.o2.cz, rcr.o2.cz and a few other host names.

o2.cz resolves to two IP numbers: 2001:41d8:1:742:2::2 and 160.218.161.162.

other host names including posm.eurotel.cz, o2da.cz, images.o2.cz, o2internet.cz and o2-shop.cz share IP numbers with o2.cz.

o2.cz is delegated to two name servers dns.iol.cz and ns2.tel.cz.

o2.cz shares the same name server setup as other domains, for instance 4.81.109.in-addr.arpa, 144.80.109.in-addr.arpa, 167.182.90.in-addr.arpa, 19.183.90.in-addr.arpa and 198.161.85.in-addr.arpa.

Host names with two IP numbers:

The host name dns.iol.cz points to 2a00:1028:100:102::61 and 194.228.2.61; the host name ns2.tel.cz points to 2a00:1028:1:205::2 and 194.228.2.1.

o2.cz is handled by a single mail server, smtp-in.o2.cz.

o2.cz shares the same mail server setup as other domains, for instance opencall.cz, o2chytraskola.cz, radost.sk, o2.sk and smartcity.cz.

smtp-in.o2.cz resolves to two IP numbers: 2a00:1028:d:2963::106 and 90.176.151.98.