`57.cz`

DNSSEC	⚠️ Not signed
A	46.149.113.153^{🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o.}
		PTR	`realityb.one.cz`
NS	`ns1.one.cz` ⭐
		A	2001:470:6f:864::1^{🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA}
			PTR	`ns1.one.cz`
		A	46.149.113.151^{🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o.}
			PTR	`ns1.one.cz`
NS	`ns2.one.cz`
		A	193.85.20.140^{🇨🇿 TMOBILE-CZ193.85.0.0/16 T-Mobile Czech Republic a.s.}
			PTR	`ns2.one.cz`
NS	`ns3.one.cz` ⚠️ Not in zone NS records
		A	2001:470:6f:30f::1:1^{🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA}
			PTR	`ns3.one.cz`
		A	46.149.113.187^{🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o.}
			PTR	`ns3.one.cz`
SOA	`ns1.one.cz`one@one.cz 2022-03-29 #12

`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=1783950440

Same first word

57.hu

57.be

57.cn

57.sb

57.com.tw

57.digital

57.gg

57.vc

57.hk

57.in-addr.arpa

57.chat

57.la

57.am

57.de

57.ph

57.pl

57.amsterdam

57.com

57.ro

57.vg

57.pe

57.ai

57.world

57.cz

57.com.cn

57.cx

57.se

57.biz

57.net.cn

57.cl

57.si

57.media

57.dk

57.fi

57.lt

57.org.cn

57.by

57.org

57.com.hk

57.net

57.game

57.eu

57.nl

57.no

57.cc

Similar names

75.de

75.la

75.org

75.se

75.plus

75.network

75.ru

75.org.uk

75.world

75.net.cn

75.cz

75.co

75.gold

75.cc

75.no

75.su

75.fr

75.ms

75.amsterdam

75.cn

75.lv

75.lt

75.biz

75.chat

75.dk

75.co.za

75.nl

75.be

75.ag

75.pe

75.hk

75.ph

75.com

75.team

75.tv

75.pl

75.net

75.tel

75.nu

75.to

75.in-addr.arpa

75.wf

75.al

DNS History

5 records (4 active, 1 former)

●NSns1.one.cz2015-08-17 → 2026-07-13 · 2 obs

● 2015-08-17 11:26:52
● 2026-07-13 14:24:18

●NSns2.one.cz2015-08-17 → 2026-07-13 · 2 obs

● 2015-08-17 11:26:52
● 2026-07-13 14:24:18

●NSns3.one.cz2026-06-18 → 2026-07-13 · 3 obs

○ 2015-08-17 11:26:52
● 2026-06-18 13:00:14
● 2026-07-13 14:24:18

●A46.149.113.1532026-06-18 → 2026-07-13 · 3 obs

○ 2021-10-23 22:52:30
● 2026-06-18 13:00:14
● 2026-07-13 14:24:18

○A46.149.113.1922015-08-17 → 2021-10-23 · 4 obs

● 2015-08-17 11:26:52
● 2021-10-23 22:52:30
○ 2026-06-18 13:00:14
○ 2026-07-13 14:24:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
57.cz	ns1.one.cz, ns2.one.cz, ns3.one.cz	5 records

✅ Authoritative Response

Server:46.149.113.187

NS records: ns1.one.cz, ns2.one.cz, ns3.one.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1643ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`46.149.113.153`
NS	2	`ns2.one.cz, ns1.one.cz`
SOA	1	`ns1.one.cz one.one.cz`

📌 Glue Records Collected

Total: 5

Out-of-bailiwick: 5 (ns1.one.cz, ns1.one.cz, ns2.one.cz...)

Analysis

IP Addresses

57.cz resolves to one IP address: 46.149.113.153.

zrale-zeny.cz, irena.cz, www.klara.cz and two other host names share IP numbers with 57.cz.

Name Servers

Three name servers are authoritative for 57.cz: ns1.one.cz, ns2.one.cz and ns3.one.cz.

The name servers of 57.cz overlap at least partially with those of other domains — among them spu.cz, sekr.cz, sinajbk.cz and two more.

Hostnames that resolve to two IP addresses:

ns1.one.cz maps to two IP addresses — 46.149.113.151 and 2001:470:6f:864::1.

ns3.one.cz maps to two IP addresses — 46.149.113.187 and 2001:470:6f:30f::1:1.

Hosts with just one IP address:

ns2.one.cz points to the IP address 193.85.20.140.

57.cz - robtex.com

57.cz

cz