nfsshift.cz - robtex.com
nfsshift.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.86.11🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | php5.web4u.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 | 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 2009-02-12 #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=1777169834 | ||||||
Same first word
nfsshift.cz |
DNS History
5 records (4 active, 1 former)
○MXmail.nfsshift.cz2015-07-06 → 2017-03-25 · 4 obs
● 2017-03-25 17:13:32
○ 2026-04-08 22:06:54
○ 2026-04-26 02:29:56
●MXmx.web4u.cz2026-04-08 → 2026-04-26 · 3 obs
● 2026-04-08 22:06:54
● 2026-04-26 02:29:56
●A81.91.86.112015-07-06 → 2026-04-26 · 2 obs
● 2026-04-26 02:29:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| nfsshift.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
⚠️ Insecure (no DNSSEC)
No DS record for nfsshift.cz (unsigned zone)
⏱️ Timing
Total: 982ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.11 |
| 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
IP Addresses
nfsshift.cz resolves to a single IP address: 81.91.86.11.
Other host names including sportfinal.com, hasena.cz, stach-stavby.cz, italkontakt.cz and unassigned-195-39-95-254.web4u.cz share IP numbers with nfsshift.cz.
Name Servers
nfsshift.cz's delegation uses two name servers, ns2.web4u.cz and ns.web4u.cz.
nfsshift.cz shares the same name server setup as other domains, for example budai.cz, mixa.es, veterinarytranslations.cz, photoexpedition.cz and zbozizababku.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
nfsshift.cz is handled by a single mail server, mx.web4u.cz.
nfsshift.cz shares its mail server setup with other domains, including katlov.com, antiky.cz, csadplzen.eu, alfaclinic.eu and topedit.eu.
nfsshift.cz shares some mail servers with other domains, at least partially, for instance pujcovna-lodi.cz.
mx.web4u.cz points to two IPs: 2001:1568::7012 and 81.91.87.12.