jestednet.cz - dns.ninja
jestednet.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 84.244.104.6🇨🇿 BlueTone-AS84.244.64.0/18 BlueTone-CRa-CZ Third address block | ||||||
| NS | ns.4com.cz ⭐ | ||||||
| A | 84.244.104.12🇨🇿 BlueTone-AS84.244.64.0/18 BlueTone-CRa-CZ Third address block | ||||||
| PTR | ns.4com.cz | ||||||
| NS | ns.4com.name | ||||||
| A | 64.52.162.199 | ||||||
| PTR | 64.52.162.199.static.skysilk.com | ||||||
| NS | ns.4com.us | ||||||
| A | 46.36.37.76🇨🇿 SECURITYNET-AS46.36.37.0/24 GTT-NET prefix | ||||||
| PTR | ns.4com.us | ||||||
| MX | posta.zone ⭐ | ||||||
| A | 84.244.104.10🇨🇿 BlueTone-AS84.244.64.0/18 BlueTone-CRa-CZ Third address block | ||||||
| PTR | posta.zone | ||||||
| TXT | google-site-verification=UnLBAPobGxhcUtuCqldjEdzWQXZ4ZAZ9fVN_LomC66U | ||||||
| TXT | v=spf1 ip4:84.244.104.0/24 -all | ||||||
| SOA | ns.4com.czdomain@4com.cz 2025-12-26 #0 | ||||||
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=1786112240 | ||||||
Subdomains
mail.jestednet.cz |
Same first word
jestednet.cz |
DNS History
9 records (5 active, 4 former)
●NSns.4com.cz2026-03-09 → 2026-08-07 · 3 obs
● 2026-03-09 18:33:14
● 2026-08-07 14:40:40
●NSns.4com.name2026-03-09 → 2026-08-07 · 3 obs
● 2026-03-09 18:33:14
● 2026-08-07 14:40:40
●NSns.4com.us2026-03-09 → 2026-08-07 · 3 obs
● 2026-03-09 18:33:14
● 2026-08-07 14:40:40
○NSns1.makrodata.cz2015-08-16 → 2016-09-17 · 4 obs
● 2016-09-17 09:07:36
○ 2026-03-09 18:33:14
○ 2026-08-07 14:40:40
○NSns2.makrodata.cz2015-08-16 → 2016-09-17 · 4 obs
● 2016-09-17 09:07:36
○ 2026-03-09 18:33:14
○ 2026-08-07 14:40:40
○MXmail.jestednet.cz2015-08-16 → 2016-09-17 · 4 obs
● 2016-09-17 09:07:36
○ 2026-03-09 18:33:14
○ 2026-08-07 14:40:40
●MXposta.zone2026-03-09 → 2026-08-07 · 6 obs
● 2026-03-09 18:33:14
● 2026-06-05 22:13:50
○ 2026-06-13 20:35:16
● 2026-06-30 03:13:24
● 2026-08-07 14:40:40
○A84.244.104.142015-08-16 → 2016-09-17 · 4 obs
● 2016-09-17 09:07:36
○ 2026-03-09 18:33:14
○ 2026-08-07 14:40:40
●A84.244.104.62026-03-09 → 2026-08-07 · 6 obs
● 2026-03-09 18:33:14
● 2026-06-05 22:13:50
○ 2026-06-13 20:35:16
● 2026-06-30 03:13:24
● 2026-08-07 14:40:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| jestednet.cz | ns.4com.cz, ns.4com.us, ns.4com.name | - |
✅ Authoritative Response
Server:84.244.104.12
NS records: ns.4com.cz, ns.4com.us, ns.4com.name
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for jestednet.cz (unsigned zone)
⏱️ Timing
Total: 4368ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 84.244.104.6 |
| NS | 3 | ns.4com.cz, ns.4com.us... |
| MX | 1 | posta.zone (pri: 10) |
| TXT | 2 | google-site-verification=UnLBAPobGxhcUtu, v=spf1 ip4:84.244.104.0/24 -all |
| SOA | 1 | ns.4com.cz domain.4com.cz |
Analysis
Hierarchy
jestednet.cz is the parent zone for mail.jestednet.cz.
IP Addresses
jestednet.cz points to a single IP number: 84.244.104.6.
steels-liberec.cz, 4com.cz, jested.net and 4com.page are examples of host names that share IP numbers with jestednet.cz.
Name Servers
jestednet.cz carries NS records delegating to ns.4com.cz, ns.4com.name and ns.4com.us.
jestednet.cz partially shares its NS delegation with several other domains, including makrodata.cz, jested.net, inpos-projekt.cz and two others.
These name servers often co-occur with the name servers 64.52.108.177.
ns.4com.cz points to 84.244.104.12; ns.4com.name points to 64.52.162.199; ns.4com.us points to 46.36.37.76 — each hostname maps to exactly one IP address.
Mail Servers
jestednet.cz has one mail server: posta.zone.
jestednet.cz shares the same mail server setup as other domains, including vselibice.cz, lus.cz, medsix.cz and two others.
posta.zone carries a single IP number, which is 84.244.104.10.