ctinvet.com - robtex.com
ctinvet.com
| DNSSEC | ⚠️ Not signed | ||||||
| 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 2025-05-03 #0 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1776213127 | ||||||
Subdomains
mail.ctinvet.com |
Similar names
DNS History
7 records (5 active, 2 former)
○MXmail.ctinvet.com2015-07-26 → 2017-03-19 · 4 obs
● 2017-03-19 07:10:06
○ 2020-01-13 11:32:10
○ 2026-04-15 00:54:58
○MXmx.web4u.cz2020-01-13 → 2020-01-13 · 4 obs
● 2020-01-13 11:32:10
○ 2026-04-15 00:54:54
○ 2026-04-15 00:54:58
●MXmx1.mailchannels.net2026-04-15 → 2026-04-15 · 3 obs
● 2026-04-15 00:54:54
● 2026-04-15 00:54:58
●MXmx2.mailchannels.net2026-04-15 → 2026-04-15 · 3 obs
● 2026-04-15 00:54:54
● 2026-04-15 00:54:58
●A81.91.86.112015-07-26 → 2026-04-15 · 2 obs
● 2026-04-15 00:54:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net, h.gtld-servers.net... | - |
| ctinvet.com | ns.web4u.cz, ns2.web4u.cz | - |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ctinvet.com (unsigned zone)
⏱️ Timing
Total: 545ms | 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 |
Analysis
Hierarchy
ctinvet.com is the parent of mail.ctinvet.com.
IP Addresses
ctinvet.com resolves to a single IP: 81.91.86.11.
Other host names, for instance unassigned-81-91-81-219.web4u.cz, unassigned-81-91-80-211.web4u.cz, fcc.cz, unassigned-81-91-82-80.web4u.cz and urbans.cz share IP numbers with ctinvet.com.
Name Servers
ctinvet.com has two name servers: ns2.web4u.cz and ns.web4u.cz.
ctinvet.com shares the same name server setup as other domains, for example bongopark.cz, lesscss.cz, sinj.eu, 0-1.cz and lightline.cz.
ctinvet.com partially shares name servers with other domains, for instance varicad.ca.
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
ctinvet.com is served by two mail servers: mx1.mailchannels.net and mx2.mailchannels.net.
ctinvet.com shares the mail server setup with other domains, for example personalcomputer.net, prague.guru, duncanclarke.net, jitwebservices.com and ammo101.com.
ctinvet.com shares at least some mail servers with other domains, for example foreverdigital.net.
Host names with a single IP:
mx1.mailchannels.net points to 54.69.1.140
mx2.mailchannels.net points to 18.236.29.166