reference.cz - dns.ninja

`reference.cz`

DNSSEC	🔒 Signed (DS record present)
A	2a01:430:43::130^{🇨🇿 MASTER-AS2a01:430::/32 MASTER-IPV6-1-MAI-CZ}
		PTR	`charon.tele3.cz`
A	81.31.35.130^{🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1}
NS	`ns1.tele3.cz` ⭐
		A	2001:1528:123::d01^{🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network}
			PTR	`ns1.tele3.cz`
		A	81.0.217.111^{🇨🇿 CASABLANCA-AS81.0.217.0/24 Casablanca INT}
NS	`ns2.tele3.cz`
		A	2001:4de8:fa71:7e1e::d02^{🇨🇿 QUANTCOM-AS2001:4de8::/32 Dial Telecom, a.s.}
			PTR	`ns2.tele3.cz`
		A	95.80.251.222^{🇨🇿 QUANTCOM-AS95.80.192.0/18 Dial Telecom, a.s.}
			PTR	`ns2.tele3.cz`
NS	`ns3.tele3.eu`
		A	2a01:4f8:162:24c1::d03^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns3.tele3.eu`
		A	5.9.97.250^{🇩🇪 Hetzner5.9.0.0/16 HETZNER-RZ-FKS-BLK5}
			PTR	`ns3.tele3.eu`
MX	`redmail.cloudsystem.cz` ⭐
		A	88.146.242.176^{🇨🇿 VODAFONE-CZ-AS88.146.192.0/18 Vodafone Czech Republic a.s.}
SOA	`ns1.tele3.cz`root@tele3.cz serial=1778559264

`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=1782753437

Same first word

Similar names

refernece.com

refeernce.com

DNS History

12 records (6 active, 6 former)

●NSns1.tele3.cz2015-06-19 → 2026-06-29 · 2 obs

● 2015-06-19 11:51:18
● 2026-06-29 18:04:38

●NSns2.tele3.cz2015-06-19 → 2026-06-29 · 2 obs

● 2015-06-19 11:51:18
● 2026-06-29 18:04:38

○NSns3.tele3.cz2015-06-19 → 2017-03-16 · 4 obs

● 2015-06-19 11:51:18
● 2017-03-16 09:17:58
○ 2026-04-06 17:43:42
○ 2026-06-29 18:04:38

●NSns3.tele3.eu2026-04-06 → 2026-06-29 · 3 obs

○ 2017-03-16 09:17:58
● 2026-04-06 17:43:42
● 2026-06-29 18:04:38

○NSns4.tele3.eu2015-11-07 → 2017-03-16 · 5 obs

○ 2015-06-19 11:51:18
● 2015-11-07 07:51:00
● 2017-03-16 09:17:58
○ 2026-04-06 17:43:42
○ 2026-06-29 18:04:38

○NSns4.tele3.sk2015-06-19 → 2015-06-19 · 3 obs

● 2015-06-19 11:51:18
○ 2015-11-07 07:51:00
○ 2026-06-29 18:04:38

○MXmail.reference.cz2015-06-19 → 2017-03-16 · 4 obs

● 2015-06-19 11:51:18
● 2017-03-16 09:17:58
○ 2026-04-06 17:43:42
○ 2026-06-29 18:04:38

●MXredmail.cloudsystem.cz2026-04-06 → 2026-06-29 · 3 obs

○ 2017-03-16 09:17:58
● 2026-04-06 17:43:42
● 2026-06-29 18:04:38

○A2001:1528:123:1234:beef::feed2015-06-19 → 2017-03-16 · 4 obs

● 2015-06-19 11:51:18
● 2017-03-16 09:17:58
○ 2026-04-06 17:43:42
○ 2026-06-29 18:04:38

●A2a01:430:43::1302026-04-06 → 2026-06-29 · 3 obs

○ 2017-03-16 09:17:58
● 2026-04-06 17:43:42
● 2026-06-29 18:04:38

○A81.0.217.1072015-06-19 → 2017-03-16 · 4 obs

● 2015-06-19 11:51:18
● 2017-03-16 09:17:58
○ 2026-04-06 17:43:42
○ 2026-06-29 18:04:38

●A81.31.35.1302026-04-06 → 2026-06-29 · 3 obs

○ 2017-03-16 09:17:58
● 2026-04-06 17:43:42
● 2026-06-29 18:04:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
reference.cz	ns1.tele3.cz, ns2.tele3.cz, ns3.tele3.eu	4 records

✅ Authoritative Response

Server:81.0.217.111

NS records: ns1.tele3.cz, ns2.tele3.cz, ns3.tele3.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1223ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.31.35.130`
AAAA	1	`2a01:430:43::130`
NS	3	`ns2.tele3.cz, ns3.tele3.eu...`
MX	1	`redmail.cloudsystem.cz (pri: 10)`
SOA	1	`ns1.tele3.cz root.tele3.cz`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.tele3.cz, ns1.tele3.cz, ns2.tele3.cz...)

Analysis

IP Addresses

reference.cz directs to two IP numbers, 81.31.35.130 and 2a01:430:43::130

Two other host names, along with barman-show.cz, sfingaos.cz and jasa-sro.com, also share IP numbers with reference.cz.

Name Servers

reference.cz is delegated to three name servers: ns1.tele3.cz, ns2.tele3.cz and ns3.tele3.eu.

reference.cz shares at least some of its name servers with other domains, including cesky-trh.cz, xmax.cz, sunny.cz and two others.

These name servers are frequently seen alongside the name servers ns4.tele3.us.

ns1.tele3.cz, ns2.tele3.cz and ns3.tele3.eu each resolve to two IP addresses: ns1.tele3.cz resolves to 81.0.217.111 and 2001:1528:123::d01; ns2.tele3.cz resolves to 95.80.251.222 and 2001:4de8:fa71:7e1e::d02; ns3.tele3.eu resolves to 5.9.97.250 and 2a01:4f8:162:24c1::d03.

Mail Servers

The sole mail server for reference.cz is redmail.cloudsystem.cz.

Among the domains sharing a mail server setup with reference.cz are krasomila.cz, nastridacce.cz, walter.cz and two others.

redmail.cloudsystem.cz resolves to a single IP number: 88.146.242.176.