composit.cz - robtex.com
composit.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 | 18.236.29.166🇺🇸 Amazon18.236.0.0/15 EC2 PDX prefix | ||||||
| PTR | ec2-18-236-29-166.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 2025-04-07 #2 | ||||||
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=1776192435 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●MXmx1.mailchannels.net2026-02-28 → 2026-04-14 · 2 obs
● 2026-04-14 19:39:10
●MXmx2.mailchannels.net2026-02-28 → 2026-04-14 · 2 obs
● 2026-04-14 19:39:10
●A2001:1568::142026-02-28 → 2026-04-14 · 2 obs
● 2026-04-14 19:39:10
●A81.91.86.142026-02-28 → 2026-04-14 · 2 obs
● 2026-04-14 19:39:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz, c.ns.nic.cz | - |
| composit.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: 774ms | 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) |
| 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
composit.cz resolves to two IP numbers: 2001:1568::14 and 81.91.86.14.
Other host names, for instance mail.cleanday.cz, auti.cz, vinoteka-sklipek.cz, d159-3.server4u.cz and trikolka.com share IP numbers with composit.cz.
Name Servers
composit.cz has two name servers: ns2.web4u.cz and ns.web4u.cz.
composit.cz shares the same name server setup as other domains, for example jansmetana.cz, ellieward.com, proal.cz, dvere-colortap.cz and seim.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
composit.cz is served by two mail servers: mx1.mailchannels.net and mx2.mailchannels.net.
composit.cz shares the mail server setup with other domains, for example p1repair.com, ghushe.com, rotate-berlin.com, omrg.org and mail.willismorse.com.
composit.cz shares some mail servers with other domains at least partially, for instance mayfly.se and kristallrummet.se.
Host names with one IP number:
mx1.mailchannels.net points to: 18.236.29.166
mx2.mailchannels.net points to: 18.236.29.166
Names pointing to 18.236.29.166: mx1.mailchannels.net and mx2.mailchannels.net