upgate.cz - robtex.com
upgate.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:1568::14🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php7.web4u.cz | ||||||
| A | 81.91.86.14🇨🇿 WEB4U81.91.80.0/21 | ||||||
| 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 | mx.web4u.cz ⭐ | ||||||
| A | 2001:1568::7012🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | mx.web4u.cz | ||||||
| A | 81.91.87.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | mx.web4u.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2021-05-21 #1 | ||||||
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=1777243635 | ||||||
Subdomains
mail.upgate.cz |
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
●NSns.web4u.cz2026-04-25 → 2026-04-26 · 3 obs
● 2026-04-25 10:08:54
● 2026-04-26 23:09:12
○NSns1.regzone.cz2015-08-14 → 2016-06-25 · 4 obs
● 2016-06-25 01:25:46
○ 2017-02-18 20:49:28
○ 2026-04-26 23:09:12
○NSns1.regzone.de2015-08-14 → 2016-06-25 · 4 obs
● 2016-06-25 01:25:46
○ 2017-02-18 20:49:28
○ 2026-04-26 23:09:12
○NSns1.regzone.info2015-08-14 → 2016-06-25 · 4 obs
● 2016-06-25 01:25:46
○ 2017-02-18 20:49:28
○ 2026-04-26 23:09:12
●NSns2.web4u.cz2026-04-25 → 2026-04-26 · 3 obs
● 2026-04-25 10:08:54
● 2026-04-26 23:09:12
●A2001:1568::142026-04-25 → 2026-04-26 · 3 obs
● 2026-04-25 10:08:54
● 2026-04-26 23:09:12
●A81.91.86.142026-04-25 → 2026-04-26 · 3 obs
● 2026-04-25 10:08:54
● 2026-04-26 23:09:12
○A82.196.13.282015-08-14 → 2016-06-25 · 4 obs
● 2016-06-25 01:25:46
○ 2017-02-18 20:49:28
○ 2026-04-26 23:09:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| upgate.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: 1852ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.14 |
| AAAA | 1 | 2001:1568::14 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| 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
Hierarchy
mail.upgate.cz is a child of upgate.cz.
IP Addresses
upgate.cz has two IP numbers: 2001:1568::14 and 81.91.86.14.
Other host names, for instance mail.roxanastodolni.cz, www.sidus.cz, huvero.com, webmatix.com and komerce.cz share IP numbers with upgate.cz.
Name Servers
upgate.cz's delegation uses two name servers: ns2.web4u.cz and ns.web4u.cz.
upgate.cz uses the same name server setup as other domains, such as beharovice.eu, praguesports.cz, uvalasku.eu, solio.sk and redexim.cz.
Host names with two IPs:
ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12
ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241
Mail Servers
A single mail server handles upgate.cz, mx.web4u.cz.
upgate.cz shares the same mail server setup as other domains, for instance kapo-tabor.cz, nasepraha4.cz, e-alibaba.cz, opareal.cz and tvfit.sk.
upgate.cz shares some mail servers with other domains, at least in part; for example jp1.cz and lascort.cz.
The host name mx.web4u.cz resolves to two IP numbers: 2001:1568::7012 and 81.91.87.12.