denycomputers.cz - robtex.com
denycomputers.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| 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 | 3db872bae0d20821.mx2.emailprofi.seznam.cz ⭐ | ||||||
| A | 2a02:598:2::1146🇨🇿 SEZNAM-CZ2a02:598:2::/48 | ||||||
| PTR | wildcard.mx2.emailprofi.seznam.cz | ||||||
| A | 77.75.77.146🇨🇿 SEZNAM-CZ77.75.76.0/23 SEZNAM - III | ||||||
| PTR | wildcard.mx2.emailprofi.seznam.cz | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2024-02-07 #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=1775965634 | ||||||
Subdomains
mail.denycomputers.cz |
Same first word
denycomputers.cz |
denycomputers.com |
Similar names
DNS History
5 records (5 active, 0 former)
●MX3db872bae0d20821.mx2.emailprofi.seznam.cz2026-03-12 → 2026-04-12 · 2 obs
● 2026-04-12 04:20:06
●A2001:1568::142026-03-12 → 2026-04-12 · 2 obs
● 2026-04-12 04:20:06
●A81.91.86.142026-03-12 → 2026-04-12 · 2 obs
● 2026-04-12 04:20:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | c.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz | - |
| denycomputers.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: 627ms | 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 | 2 | 3db872bae0d20821.mx2.emailprofi.seznam.c, 3db872bae0d20821.mx2.emailprofi.seznam.c |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.web4u.cz, ns2.web4u.cz, ns.web4u.cz...)
Analysis
Hierarchy
mail.denycomputers.cz is a child of denycomputers.cz.
IP Addresses
denycomputers.cz has two IP numbers: 2001:1568::14 and 81.91.86.14.
Other host names, for instance wwa.cz, cejlon.eu, mail.jancik.cz, advantech-vpn.com and hledampovolani.cz share IP numbers with denycomputers.cz.
Name Servers
denycomputers.cz's delegation uses two name servers: ns2.web4u.cz and ns.web4u.cz.
denycomputers.cz uses the same name server setup as other domains, such as strangeday.cz, sparepartsgas.com, rajrealit.cz, ewm.cz and resal.cz.
denycomputers.cz at least partially shares name servers with other domains, for example varicad.ca.
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 denycomputers.cz, 3db872bae0d20821.mx2.emailprofi.seznam.cz.
The host name 3db872bae0d20821.mx2.emailprofi.seznam.cz resolves to two IP numbers: 2a02:598:2::1146 and 77.75.77.146.