special.cz - robtex.com
special.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2001:1568::13🇨🇿 WEB4U2001:1568::/33 | ||||||
| PTR | php56.web4u.cz | ||||||
| A | 81.91.86.13🇨🇿 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 | mx1.mailchannels.net ⭐ | ||||||
| A | 18.236.29.166🇺🇸 Amazon18.236.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-18-236-29-166.us-west-2.compute.amazonaws.com | ||||||
| MX | mx2.mailchannels.net ⭐ | ||||||
| A | 52.38.143.159🇺🇸 Amazon52.36.0.0/14 EC2 PDX prefix | ||||||
| PTR | ec2-52-38-143-159.us-west-2.compute.amazonaws.com | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-05-03 #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=1774554437 | ||||||
Same first word
Similar names
DNS History
7 records (6 active, 1 former)
○MXmail.special.cz2015-09-04 → 2018-06-09 · 4 obs
● 2018-06-09 16:09:48
○ 2026-03-26 12:35:00
○ 2026-03-26 20:25:40
●MXmx1.mailchannels.net2026-03-26 → 2026-03-26 · 3 obs
● 2026-03-26 12:35:00
● 2026-03-26 20:25:40
●MXmx2.mailchannels.net2026-03-26 → 2026-03-26 · 3 obs
● 2026-03-26 12:35:00
● 2026-03-26 20:25:40
●A2001:1568::132015-09-04 → 2026-03-26 · 2 obs
● 2026-03-26 20:25:40
●A81.91.86.132015-09-04 → 2026-03-26 · 2 obs
● 2026-03-26 20:25:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| special.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: 1338ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.13 |
| AAAA | 1 | 2001:1568::13 |
| NS | 2 | ns.web4u.cz, ns2.web4u.cz |
| MX | 2 | mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (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
special.cz points to two IP numbers: 2001:1568::13 and 81.91.86.13.
Other host names such as ircg.org, modifio.com, klientpro.cz, josefvagner.cz and i-living.eu share IPs with special.cz.
Name Servers
Two name servers ns2.web4u.cz and ns.web4u.cz handle the delegation for special.cz.
special.cz shares the same name server setup as other domains, for example mt-pharma.cz, jananas.cz, kinolab.cz, gibs.cz and minimaxi.sk.
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
Two mail servers handle special.cz: mx1.mailchannels.net and mx2.mailchannels.net.
special.cz shares the same mail server setup as other domains, including thekampalareport.com, diamantovecentrum.cz, pddx.us, malyopen.com and goldenrulek9.com.
special.cz shares some mail servers with other domains, at least partially, for instance cloudroyale.com, carrobaaz.com, passyunksquare.org and alduodesign.com.
Host names with one IP number:
mx1.mailchannels.net points to 18.236.29.166; mx2.mailchannels.net points to 52.38.143.159.