bytes.cz - dns.ninja
bytes.cz
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=1785872842 | ||||||
Same first word
Similar names
DNS History
13 records (8 active, 5 former)
●NSns1.poda.cz2026-03-16 → 2026-08-04 · 3 obs
● 2026-03-16 20:40:04
● 2026-08-04 19:59:18
○NSns1.skynet.cz2015-06-04 → 2019-01-27 · 4 obs
● 2019-01-27 21:42:20
○ 2026-03-16 20:40:04
○ 2026-08-04 19:59:18
●NSns2.poda.cz2026-03-16 → 2026-08-04 · 3 obs
● 2026-03-16 20:40:04
● 2026-08-04 19:59:18
○NSns2.skynet.cz2015-06-04 → 2019-01-27 · 4 obs
● 2019-01-27 21:42:20
○ 2026-03-16 20:40:04
○ 2026-08-04 19:59:18
●NSns3.poda.cz2026-03-16 → 2026-08-04 · 3 obs
● 2026-03-16 20:40:04
● 2026-08-04 19:59:18
●MXax.virusfree.cz2019-01-27 → 2026-08-04 · 3 obs
● 2019-01-27 21:42:20
● 2026-08-04 19:59:18
●MXbx.virusfree.cz2019-01-27 → 2026-08-04 · 3 obs
● 2019-01-27 21:42:20
● 2026-08-04 19:59:18
○MXbytesta-gw.bytes.cz2015-06-04 → 2017-02-05 · 4 obs
● 2017-02-05 16:16:08
○ 2019-01-27 21:42:20
○ 2026-08-04 19:59:18
●MXcx.spamfree.cz2019-01-27 → 2026-08-04 · 3 obs
● 2019-01-27 21:42:20
● 2026-08-04 19:59:18
●MXdx.spamfree.cz2019-01-27 → 2026-08-04 · 3 obs
● 2019-01-27 21:42:20
● 2026-08-04 19:59:18
○MXrelay.skynet.cz2015-06-04 → 2015-12-19 · 4 obs
● 2015-12-19 14:00:26
○ 2016-05-08 10:01:34
○ 2026-08-04 19:59:18
○MXxrelay.skynet.cz2015-06-04 → 2015-12-19 · 4 obs
● 2015-12-19 14:00:26
○ 2016-05-08 10:01:34
○ 2026-08-04 19:59:18
●A31.15.10.472019-01-27 → 2026-08-04 · 2 obs
● 2026-08-04 19:59:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| bytes.cz | ns1.poda.cz, ns2.poda.cz, ns3.poda.cz | - |
✅ Authoritative Response
Server:81.31.42.139
NS records: ns1.poda.cz, ns2.poda.cz, ns3.poda.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for bytes.cz (unsigned zone)
⏱️ Timing
Total: 1164ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 31.15.10.47 |
| NS | 3 | ns1.poda.cz, ns3.poda.cz... |
| MX | 4 | cx.spamfree.cz (pri: 12833), bx.virusfree.cz (pri: 12817)... |
| TXT | 1 | v=spf1 ip4:193.165.137.32/29 ~all |
| SOA | 1 | ns1.poda.cz hostmaster.poda.cz |
Analysis
IP Addresses
bytes.cz directs to one IP number, which is 31.15.10.47.
Among the host names that share IP numbers with bytes.cz are ecoledsol.cz, techniservit.cz, dobrygeodet.sk and two others.
Name Servers
DNS for bytes.cz is handled by three authoritative name servers: ns1.poda.cz, ns2.poda.cz and ns3.poda.cz.
bytes.cz shares at least some of its name servers with other domains, including 145.165.193.in-addr.arpa, 116.215.164.in-addr.arpa, 102.242.94.in-addr.arpa and two others.
These name servers are frequently paired with the name servers ns1.k2datovecentrum.cz, ns2.k2datovecentrum.cz and ns3.k2datovecentrum.cz.
Hosts with two IP numbers each:
ns1.poda.cz has two IP addresses: 89.29.29.230 and 2a00:ca8:591d:1de0::591d:1de6.
ns3.poda.cz has two IP addresses: 81.31.42.139 and 2a01:430:111::139.
Hosts that resolve to one IP address:
ns2.poda.cz directs to 178.248.9.14.
Mail Servers
Four mail servers handle email for bytes.cz: cx.spamfree.cz, dx.spamfree.cz, ax.virusfree.cz and bx.virusfree.cz.
bytes.cz shares at least some of its mail servers with other domains — for example karatsoftware.com, amenit.cz, cymedica.cz and two more.
cx.spamfree.cz, dx.spamfree.cz, ax.virusfree.cz and bx.virusfree.cz each resolve to two IP addresses. cx.spamfree.cz points to 195.24.76.170 and 2001:67c:15a3::d1. dx.spamfree.cz points to 195.24.76.170 and 2001:67c:15a3::d1. ax.virusfree.cz points to 31.7.241.24 and 2001:67c:15a1::a1. bx.virusfree.cz points to 89.187.156.46 and 2001:67c:15a2::b1.
Host names pointing to 2001:67c:15a3::d1 IP addresses: cx.spamfree.cz and dx.spamfree.cz.
Host names pointing to 195.24.76.170 IP addresses: cx.spamfree.cz and dx.spamfree.cz.