qehs.cz - robtex.com
qehs.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| 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 | mx1.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 | ||||||
| MX | mx2.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 | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-05-02 #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=1776066435 | ||||||
Same first word
Similar names
DNS History
7 records (5 active, 2 former)
○MXmail.qehs.cz2015-07-25 → 2017-03-23 · 4 obs
● 2017-03-23 08:53:40
○ 2020-02-28 12:31:14
○ 2026-04-13 07:55:40
○MXmx.web4u.cz2020-02-28 → 2020-02-28 · 4 obs
● 2020-02-28 12:31:14
○ 2026-04-11 03:01:00
○ 2026-04-13 07:55:40
●MXmx1.mailchannels.net2026-04-11 → 2026-04-13 · 3 obs
● 2026-04-11 03:01:00
● 2026-04-13 07:55:40
●MXmx2.mailchannels.net2026-04-11 → 2026-04-13 · 3 obs
● 2026-04-11 03:01:00
● 2026-04-13 07:55:40
●A81.91.86.112015-07-25 → 2026-04-13 · 2 obs
● 2026-04-13 07:55:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| qehs.cz | ns2.web4u.cz, ns.web4u.cz | 4 records |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns2.web4u.cz, ns.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 915ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.91.86.11 |
| 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 (ns2.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
qehs.cz points to a single IP: 81.91.86.11.
Other host names, for instance backup6-new.web4u.cz, unassigned-81-91-84-37.web4u.cz, www.radimesi.cz, unassigned-81-91-81-230.web4u.cz and aladar.cz share IP numbers with qehs.cz.
Name Servers
qehs.cz's delegation is to two name servers ns2.web4u.cz and ns.web4u.cz.
qehs.cz shares the same name server configuration as other domains, such as pouc.cz, petrkral.cz, kerka.cz, webjet.cz and apartmany-sumava.net.
qehs.cz shares name servers with other domains at least partially, for example feng-shui-blog.cz.
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 mx1.mailchannels.net and mx2.mailchannels.net handle qehs.cz.
qehs.cz uses the same mail server setup as other domains such as dtgbrasil.com.br, dowelingdrills.com, shrum.info, customs.fit and bysubset.com.
Host names with a single IP:
mx1.mailchannels.net resolves to 54.69.1.140.
mx2.mailchannels.net resolves to 18.236.29.166.