rackserver.cz - robtex.com
rackserver.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.31.45.146🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1 | ||||||
| PTR | 81-31-45-146.static.masterinter.net | ||||||
| NS | ns1.master.cz ⭐ | ||||||
| A | 2a01:430:100:16::2🇨🇿 MASTER-AS2a01:430::/32 MASTER-IPV6-1-MAI-CZ | ||||||
| PTR | ns1.master.cz | ||||||
| A | 81.31.33.23🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1 | ||||||
| PTR | ns1.master.cz | ||||||
| NS | ns2.master.cz | ||||||
| A | 2a01:430:200:b::2🇨🇿 MASTER-AS2a01:430::/32 MASTER-IPV6-1-MAI-CZ | ||||||
| PTR | ns2.master.cz | ||||||
| A | 81.31.33.6🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1 | ||||||
| PTR | ns2.master.cz | ||||||
| NS | ns3.master.cz ⚠️ Not in parent delegation | ||||||
| A | 2a00:ca8:8000::c0de🇨🇿 PODA-AS2a00:ca8::/32 PODA a.s. | ||||||
| PTR | ns3.master.cz | ||||||
| A | 82.209.3.134🇨🇿 PODA-AS82.209.0.0/18 PODA-NET | ||||||
| PTR | ns3.master.cz | ||||||
| SOA | ns1.master.cznoc@master.cz 2023-04-04 #3 | ||||||
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=1784816241 | ||||||
Same first word
rackserver.at |
rackserver.eu |
rackserver.hu |
rackserver.ca |
rackserver.nl |
rackserver.cz |
rackserver.be |
rackserver.it |
rackserver.org |
rackserver.com |
rackserver.de |
rackserver.dk |
rackserver.ru |
Similar names
serverrack.info |
serverrack.nl |
serverrack.co.uk |
serverrack.de |
serverrack.net |
serverrack.se |
serverrack.io |
serverrack.com |
serverrack.at |
serverrack.ca |
serverrack.no |
DNS History
5 records (4 active, 1 former)
○A81.31.33.202015-08-21 → 2017-05-13 · 4 obs
● 2017-05-13 05:46:28
○ 2026-06-13 10:07:28
○ 2026-07-23 14:44:52
●A81.31.45.1462026-06-13 → 2026-07-23 · 3 obs
● 2026-06-13 10:07:28
● 2026-07-23 14:44:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| rackserver.cz | ns1.master.cz, ns2.master.cz | 4 records |
✅ Authoritative Response
Server:81.31.33.6
NS records: ns1.master.cz, ns2.master.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rackserver.cz (unsigned zone)
⏱️ Timing
Total: 1372ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.31.45.146 |
| NS | 3 | ns2.master.cz, ns1.master.cz... |
| SOA | 1 | ns1.master.cz noc.master.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.master.cz, ns1.master.cz, ns2.master.cz...)
Analysis
IP Addresses
rackserver.cz resolves to just one IP address, 81.31.45.146.
Two other host names, along with westmaster.net, ns2.servernow.cz and www.mastercloud.sk, also share IP numbers with rackserver.cz.
Name Servers
rackserver.cz is served by three name servers: ns1.master.cz, ns2.master.cz and ns3.master.cz.
rackserver.cz shares at least some of its name servers with other domains, including 224.185.89.in-addr.arpa, gigahousing.eu, 255.167.83.in-addr.arpa and two others.
The name servers ns1.westmaster.com, ns2.westmaster.com, ns1.cloud4data.com and two others are commonly seen in use alongside these name servers.
The hostnames ns1.master.cz, ns2.master.cz and ns3.master.cz each direct to two IP addresses — ns1.master.cz to 81.31.33.23 and 2a01:430:100:16::2, ns2.master.cz to 81.31.33.6 and 2a01:430:200:b::2, and ns3.master.cz to 82.209.3.134 and 2a00:ca8:8000::c0de.