zebriny.com - robtex.com
zebriny.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.91.86.12🇨🇿 WEB4U81.91.80.0/21 | ||||||
| PTR | php53.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 2012-09-24 #1 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774676982 | ||||||
Subdomains
mail.zebriny.com |
Same first word
DNS History
5 records (4 active, 1 former)
○MXmail.zebriny.com2015-05-14 → 2017-05-30 · 4 obs
● 2017-05-30 13:58:18
○ 2026-03-28 05:18:46
○ 2026-03-28 05:59:26
●MXmx.web4u.cz2026-03-28 → 2026-03-28 · 3 obs
● 2026-03-28 05:18:46
● 2026-03-28 05:59:26
●A81.91.86.122015-05-14 → 2026-03-28 · 2 obs
● 2026-03-28 05:59:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| zebriny.com | ns.web4u.cz, ns2.web4u.cz | - |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for zebriny.com (unsigned zone)
⏱️ Timing
Total: 827ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.12 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 1 | mx.web4u.cz (pri: 10) |
| SOA | 1 | ns.web4u.cz admin.web4u.cz |
Analysis
Hierarchy
The parent of mail.zebriny.com is zebriny.com.
IP Addresses
zebriny.com points to a single IP: 81.91.86.12.
Other host names, for instance iedu.cz, tamadex.net, grabl.cz, apvservis.com and valanga.eu share IP numbers with zebriny.com.
Name Servers
Two name servers ns2.web4u.cz and ns.web4u.cz handle delegation for zebriny.com.
zebriny.com uses the same name server setup as other domains, for example imco.cz, alexiss.eu, 1795.cz, remis.info and jiri-novak.com.
Host names with two IP numbers:
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
zebriny.com is handled by a single mail server, mx.web4u.cz.
zebriny.com has the same mail server setup as other domains, including used.cz, greep.eu, revisol.cz, 4ipc.eu and proofandreason.com.
Some mail servers are shared between zebriny.com and other domains, for example creditcheck.cz.
Host mx.web4u.cz resolves to two IPs: 2001:1568::7012 and 81.91.87.12.