prepis-not.cz - robtex.com
prepis-not.cz
| DNSSEC | ⚠️ Not signed | ||||||
| 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 | ||||||
| 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 | ||||||
| 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 | ||||||
| SOA | ns.web4u.czadmin@web4u.cz 2025-05-04 #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=1783876640 | ||||||
Same first word
prepis-not.cz |
Similar names
DNS History
13 records (6 active, 7 former)
○NSns.onebit.cz2015-05-31 → 2015-05-31 · 3 obs
○ 2015-10-16 18:52:38
○ 2026-07-12 17:41:34
○NSns.onebit.eu2015-05-31 → 2015-05-31 · 3 obs
○ 2015-10-16 18:52:38
○ 2026-07-12 17:41:34
○NSns.onebit.org2015-05-31 → 2015-05-31 · 3 obs
○ 2015-10-16 18:52:38
○ 2026-07-12 17:41:34
●NSns.web4u.cz2016-07-22 → 2026-07-12 · 3 obs
● 2016-07-22 00:21:04
● 2026-07-12 17:41:34
●NSns2.web4u.cz2016-07-22 → 2026-07-12 · 3 obs
● 2016-07-22 00:21:04
● 2026-07-12 17:41:34
○MXmail.prepis-not.cz2016-07-22 → 2016-07-22 · 4 obs
● 2016-07-22 00:21:04
○ 2026-06-13 02:31:02
○ 2026-07-12 17:41:34
○MXmail4.onebit.cz2015-05-31 → 2015-05-31 · 3 obs
○ 2015-10-16 18:52:38
○ 2026-07-12 17:41:34
●MXmx1.mailchannels.net2026-06-13 → 2026-07-12 · 3 obs
● 2026-06-13 02:31:02
● 2026-07-12 17:41:34
●MXmx2.mailchannels.net2026-06-13 → 2026-07-12 · 3 obs
● 2026-06-13 02:31:02
● 2026-07-12 17:41:34
○MXmx4.onebit.org2015-05-31 → 2015-05-31 · 3 obs
○ 2015-10-16 18:52:38
○ 2026-07-12 17:41:34
●A2001:1568::132016-07-22 → 2026-07-12 · 3 obs
● 2016-07-22 00:21:04
● 2026-07-12 17:41:34
○A81.31.45.882015-05-31 → 2015-05-31 · 3 obs
○ 2015-10-16 18:52:38
○ 2026-07-12 17:41:34
●A81.91.86.132016-07-22 → 2026-07-12 · 3 obs
● 2016-07-22 00:21:04
● 2026-07-12 17:41:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| prepis-not.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: 1408ms | 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 (ns2.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)
Analysis
IP Addresses
prepis-not.cz points to the IP addresses 81.91.86.13 and 2001:1568::13
Additional host names — bitnote.eu, kubinec.org, princovi.cz and two others — share IP numbers with prepis-not.cz.
Name Servers
DNS delegation for prepis-not.cz points to two name servers: ns2.web4u.cz and ns.web4u.cz.
prepis-not.cz shares its name server setup with other domains, including kludi-cz.cz, inca.cz, hegar.cz and two others.
ns2.web4u.cz directs to 85.207.53.12 and 2a02:a40:100:28ff::12. ns.web4u.cz directs to 185.14.224.241 and 2001:1568:fd::241. Each host name carries two IP addresses.
Mail Servers
prepis-not.cz has two mail servers: mx1.mailchannels.net and mx2.mailchannels.net.
prepis-not.cz shares the same mail server setup as other domains, including wonkknow.com, mail.serverwest.net, campsite.org and two others.
prepis-not.cz has mail servers in common with other domains — claar-co.se being one example.
Both mx1.mailchannels.net and mx2.mailchannels.net have a single IP address each — mx1.mailchannels.net resolves to 54.187.177.89 while mx2.mailchannels.net resolves to 54.69.1.140.