rc1.cz - robtex.com
rc1.cz
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.tele3.cz ⚠️ Not in zone NS records | ||||||
| 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 ⚠️ Not in zone NS records | ||||||
| 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 ⚠️ Not in zone NS records | ||||||
| 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 | ||||||
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.czhostmaster@nic.cz serial=1784458042 | ||||||
Same first word
rc1.pl |
rc1.ca |
rc1.net |
rc1.dk |
rc1.org |
rc1.ru |
rc1.fr |
rc1.com.br |
rc1.cn |
rc1.cz |
rc1.com |
rc1.it |
rc1.nl |
rc1.co |
rc1.de |
rc1.ch |
rc1.eu |
rc1.no |
rc1.me |
Similar names
DNS History
12 records (3 active, 9 former)
○NSns3.tele3.cz2015-07-12 → 2017-01-22 · 4 obs
● 2017-01-22 18:16:58
○ 2026-06-14 07:24:36
○ 2026-07-19 11:17:12
●NSns3.tele3.eu2026-06-14 → 2026-07-19 · 3 obs
● 2026-06-14 07:24:36
● 2026-07-19 11:17:12
○NSns4.tele3.eu2015-11-17 → 2017-01-22 · 5 obs
● 2015-11-17 17:28:44
● 2017-01-22 18:16:58
○ 2026-06-14 07:24:36
○ 2026-07-19 11:17:12
○NSns4.tele3.sk2015-07-12 → 2015-07-12 · 3 obs
○ 2015-11-17 17:28:44
○ 2026-07-19 11:17:12
○A138.201.5.1292016-04-01 → 2016-04-01 · 4 obs
● 2016-04-01 11:32:00
○ 2016-10-05 19:43:58
○ 2026-07-19 11:17:12
○A2a01:4f8:171:10d1::1292016-04-01 → 2016-04-01 · 4 obs
● 2016-04-01 11:32:00
○ 2016-10-05 19:43:58
○ 2026-07-19 11:17:12
○A2a01:5e0:26::1762015-07-12 → 2016-01-16 · 4 obs
● 2016-01-16 02:41:52
○ 2016-04-01 11:32:00
○ 2026-07-19 11:17:12
○A2a01:5f0:c001:124:2::1672016-10-05 → 2017-01-22 · 5 obs
● 2016-10-05 19:43:58
● 2017-01-22 18:16:58
○ 2026-06-14 07:24:36
○ 2026-07-19 11:17:12
○A88.146.242.1762015-07-12 → 2016-01-16 · 4 obs
● 2016-01-16 02:41:52
○ 2016-04-01 11:32:00
○ 2026-07-19 11:17:12
○A89.187.149.1672016-10-05 → 2017-01-22 · 5 obs
● 2016-10-05 19:43:58
● 2017-01-22 18:16:58
○ 2026-06-14 07:24:36
○ 2026-07-19 11:17:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | b.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz | - |
| rc1.cz | ns3.tele3.eu, ns2.tele3.cz, ns1.tele3.cz | 4 records |
✅ Authoritative Response
Server:81.0.217.111
NS records: ns3.tele3.eu, ns2.tele3.cz, ns1.tele3.cz
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
No DNSKEY for rc1.cz
⏱️ Timing
Total: 2412ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns2.tele3.cz, ns1.tele3.cz, ns2.tele3.cz...)
Analysis
Name Servers
DNS for rc1.cz is handled by three authoritative name servers: ns1.tele3.cz, ns2.tele3.cz and ns3.tele3.eu.
rc1.cz has at least partial name server overlap with other domains, such as 130-156.35.31.81.in-addr.arpa, vydry.cz, nooby.sk and two others.
Three hostnames — ns1.tele3.cz, ns2.tele3.cz and ns3.tele3.eu — each have two IP addresses: ns1.tele3.cz has 81.0.217.111 and 2001:1528:123::d01, ns2.tele3.cz has 95.80.251.222 and 2001:4de8:fa71:7e1e::d02, and ns3.tele3.eu has 5.9.97.250 and 2a01:4f8:162:24c1::d03.