aun.cz - robtex.com
aun.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 85.217.171.145🇧🇬 belcloud85.217.171.0/24 | ||||||
| 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 | ||||||
| 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 | 54.187.177.89🇺🇸 Amazon54.186.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-54-187-177-89.us-west-2.compute.amazonaws.com | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2026-02-24 #9 | ||||||
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=1784125040 | ||||||
Subdomains
mx.aun.cz |
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
●NSns.web4u.cz2026-06-20 → 2026-07-15 · 3 obs
● 2026-06-20 17:17:16
● 2026-07-15 15:21:12
○NSns1.one.cz2015-08-17 → 2017-10-03 · 4 obs
● 2017-10-03 19:38:52
○ 2026-06-20 17:17:16
○ 2026-07-15 15:21:12
○NSns2.one.cz2015-08-17 → 2017-10-03 · 4 obs
● 2017-10-03 19:38:52
○ 2026-06-20 17:17:16
○ 2026-07-15 15:21:12
●NSns2.web4u.cz2026-06-20 → 2026-07-15 · 3 obs
● 2026-06-20 17:17:16
● 2026-07-15 15:21:12
●MXmx1.mailchannels.net2026-06-20 → 2026-07-15 · 2 obs
● 2026-07-15 15:21:12
●MXmx2.mailchannels.net2026-06-20 → 2026-07-15 · 2 obs
● 2026-07-15 15:21:12
○A178.217.247.1832020-10-29 → 2020-10-29 · 4 obs
● 2020-10-29 06:59:26
○ 2026-06-20 17:17:16
○ 2026-07-15 15:21:12
○A46.149.113.1982015-08-17 → 2017-10-03 · 4 obs
● 2017-10-03 19:38:52
○ 2020-10-29 06:59:26
○ 2026-07-15 15:21:12
●A85.217.171.1452026-06-20 → 2026-07-15 · 3 obs
● 2026-06-20 17:17:16
● 2026-07-15 15:21:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| aun.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: 1120ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 85.217.171.145 |
| 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
Hierarchy
aun.cz is the parent zone for mx.aun.cz.
IP Addresses
aun.cz resolves to one IP address: 85.217.171.145.
ccq.cz, mx.aun.cz, www.ccq.cz and two other host names share IP numbers with aun.cz.
Name Servers
aun.cz is served by two delegated name servers, ns2.web4u.cz and ns.web4u.cz.
aun.cz uses the same name servers as several other domains — among them reguli.cz, pluso.eu, veskole.cz and two more.
Each of the two host names carries two IP addresses: ns2.web4u.cz points to 85.207.53.12 and 2a02:a40:100:28ff::12, and ns.web4u.cz points to 185.14.224.241 and 2001:1568:fd::241.
Mail Servers
Mail for aun.cz is handled by two mail servers — mx1.mailchannels.net and mx2.mailchannels.net.
aun.cz uses an identical mail server configuration to several other domains — among them copperharbor.org, ymcapanama.org, swats.com and two more.
mx1.mailchannels.net and mx2.mailchannels.net share one IP address between them — 54.187.177.89.
These two host names — mx1.mailchannels.net and mx2.mailchannels.net — each point to 54.187.177.89 IP addresses.