tygergroup.cz - robtex.com
tygergroup.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 | mx1.mailchannels.net ⭐ | ||||||
| A | 54.187.177.89🇺🇸 Amazon54.186.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-54-187-177-89.us-west-2.compute.amazonaws.com | ||||||
| MX | mx2.mailchannels.net ⭐ | ||||||
| A | 54.69.1.140🇺🇸 Amazon54.68.0.0/15 EC2 PDX Prefix | ||||||
| PTR | ec2-54-69-1-140.us-west-2.compute.amazonaws.com | ||||||
| TXT | v=spf1 include:_spf.web4u.cz ~all | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-07-22 #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=1786452463 | ||||||
Subdomains
mail.tygergroup.cz |
Same first word
tygergroup.cz |
DNS History
8 records (6 active, 2 former)
○MXmail.tygergroup.cz2015-07-15 → 2017-01-09 · 4 obs
● 2017-01-09 22:34:44
○ 2026-02-25 02:07:36
○ 2026-08-11 13:17:30
●MXmx1.mailchannels.net2026-02-25 → 2026-08-11 · 3 obs
● 2026-02-25 02:07:36
● 2026-08-11 13:17:30
●MXmx2.mailchannels.net2026-02-25 → 2026-08-11 · 3 obs
● 2026-02-25 02:07:36
● 2026-08-11 13:17:30
●A2001:1568::142026-02-25 → 2026-08-11 · 3 obs
● 2026-02-25 02:07:36
● 2026-08-11 13:17:30
●A81.91.86.142026-02-25 → 2026-08-11 · 3 obs
● 2026-02-25 02:07:36
● 2026-08-11 13:17:30
○A81.91.92.1082015-07-15 → 2017-01-09 · 4 obs
● 2017-01-09 22:34:44
○ 2026-02-25 02:07:36
○ 2026-08-11 13:17:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| tygergroup.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1166ms | 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 | mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.web4u.cz ~all |
| 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
tygergroup.cz is the parent zone for mail.tygergroup.cz.
IP Addresses
tygergroup.cz directs to two IP numbers, 81.91.86.14 and 2001:1568::14
vs554.server4u.cz, gamenet.cz, evanescence.cz and two other host names share IP numbers with tygergroup.cz.
Name Servers
tygergroup.cz has two authoritative name servers — ns2.web4u.cz and ns.web4u.cz.
tygergroup.cz uses the same name servers as several other domains — among them ks7.eu, jirec.cz, nkzas.cz and two more.
Both ns2.web4u.cz and ns.web4u.cz have two IP addresses each. ns2.web4u.cz resolves to 85.207.53.12 and 2a02:a40:100:28ff::12; ns.web4u.cz resolves to 185.14.224.241 and 2001:1568:fd::241.
Mail Servers
Mail for tygergroup.cz is handled by two mail servers — mx1.mailchannels.net and mx2.mailchannels.net.
tygergroup.cz uses an identical mail server configuration to several other domains — among them mail.esferaazul.com, gaydeskitwins.com, posicionamiento-web.com and two more.
tygergroup.cz partially shares its mail servers with other domains, freddan.biz and sundblom.se being examples.
mx1.mailchannels.net resolves to 54.187.177.89. mx2.mailchannels.net resolves to 54.69.1.140. Both host names point to a single IP number.