jech.cz - robtex.com
jech.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 212.4.142.116🇨🇿 SATT-AS212.4.142.0/23 | ||||||
| PTR | uidzr142116.sattnet.cz | ||||||
| NS | ns2.web4u.cz ⭐ | ||||||
| A | 2a02:a40:100:28ff::12🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s. | ||||||
| PTR | ns2.web4u.cz | ||||||
| A | 85.207.53.12🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block | ||||||
| PTR | ns2.web4u.cz | ||||||
| NS | ns.web4u.cz | ||||||
| A | 2001:1568:fd::241🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | ns.web4u.cz | ||||||
| A | 185.14.224.241🇨🇿 WEB4U185.14.224.0/23 | ||||||
| PTR | ns.web4u.cz | ||||||
| MX | mail.uloziste.org ⭐ | ||||||
| A | 2a01:4f8:c0c:1da7::2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | mail.uloziste.org | ||||||
| A | 78.47.198.140🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5 | ||||||
| PTR | mail.uloziste.org | ||||||
| TXT | google-site-verification=5i7Rm62JC_WgfxvQNEgXDcC1KpJ_OTfg0S1KCI4JKxw | ||||||
| TXT | google-site-verification=px-ikn8fiagihq_n7lhvuujb3jaazfzpgrid2ywayrs | ||||||
| TXT | v=spf1 mx ip4:188.75.176.34/32 ip4:78.47.198.140/32 ip4:116.202.176.90 ip4:85... | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2024-10-11 #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=1774664502 | ||||||
Same first word
Similar names
DNS History
7 records (4 active, 3 former)
○MXmail.jech.cz2015-06-29 → 2017-09-28 · 4 obs
● 2017-09-28 00:56:36
○ 2026-03-25 01:32:24
○ 2026-03-28 03:14:30
●MXmail.uloziste.org2026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 01:32:24
● 2026-03-28 03:14:30
○A212.4.142.1142017-05-30 → 2017-09-28 · 5 obs
● 2017-05-30 04:47:32
● 2017-09-28 00:56:36
○ 2026-03-25 01:32:24
○ 2026-03-28 03:14:30
●A212.4.142.1162026-03-25 → 2026-03-28 · 3 obs
● 2026-03-25 01:32:24
● 2026-03-28 03:14:30
○A46.28.105.1282015-06-29 → 2016-12-25 · 4 obs
● 2016-12-25 12:40:06
○ 2017-05-30 04:47:32
○ 2026-03-28 03:14:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| jech.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1864ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 212.4.142.116 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mail.uloziste.org (pri: 10) |
| TXT | 3 | google-site-verification=5i7Rm62JC_Wgfxv, google-site-verification=px-ikn8fiagihq_... |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
jech.cz resolves to one IP number: 212.4.142.116.
Other host names, for instance www.jech.eu, jech.eu and uidzr142116.sattnet.cz share IP numbers with jech.cz.
Name Servers
jech.cz is delegated to two name servers ns2.web4u.cz and ns.web4u.cz.
jech.cz shares the same name server setup as other domains, for instance enii-nails.sk, tcg.cz, fotbalzasada.cz, k(0x616e616c)izace-kozacek.cz and no-by.cz.
Host names with two IP numbers:
The host name ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12; the host name ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
jech.cz is handled by a single mail server, mail.uloziste.org.
jech.cz shares its mail server setup with other domains, including nursen.com and uloziste.org.
mail.uloziste.org resolves to two IP numbers: 2a01:4f8:c0c:1da7::2 and 78.47.198.140.