lemar.cz - robtex.com
lemar.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 | 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 | ||||||
| TXT | v=spf1 a mx ptr include:_spf.web4u.cz ?all | ||||||
| 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=1774820835 | ||||||
Same first word
Similar names
DNS History
6 records (5 active, 1 former)
○MXmail.lemar.cz2015-06-15 → 2017-02-18 · 4 obs
● 2017-02-18 05:44:18
○ 2026-03-27 02:12:30
○ 2026-03-29 22:28:04
●MXmx1.mailchannels.net2026-03-27 → 2026-03-29 · 3 obs
● 2026-03-27 02:12:30
● 2026-03-29 22:28:04
●MXmx2.mailchannels.net2026-03-27 → 2026-03-29 · 3 obs
● 2026-03-27 02:12:30
● 2026-03-29 22:28:04
●A81.91.86.112015-06-15 → 2026-03-29 · 2 obs
● 2026-03-29 22:28:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| lemar.cz | ns.web4u.cz, ns2.web4u.cz | 4 records |
✅ Authoritative Response
Server:85.207.53.12
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 948ms | 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) |
| TXT | 1 | v=spf1 a mx ptr include:_spf.web4u.cz ?a |
| 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
IP Addresses
lemar.cz points to a single IP number: 81.91.86.11.
Other host names, for instance kmdu.cz, www.shopross.cz, ulisky.com, unassigned-81-91-86-177.web4u.cz and unassigned-81-91-87-199.web4u.cz share IP numbers with lemar.cz.
Name Servers
Delegation for lemar.cz rests with two name servers, ns2.web4u.cz and ns.web4u.cz.
lemar.cz shares the same name server setup as other domains, including brixtongastro.cz, dirtydogs.cz, ittechnik.cz, bontonfilm.cz and hadac.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
lemar.cz is handled by two mail servers: mx1.mailchannels.net and mx2.mailchannels.net.
lemar.cz uses the same mail server configuration as other domains, such as mail.blockstar.com, thebrickssi.com, lendaproducts.com, thyle.net and residencyinvest.co.uk.
lemar.cz shares some mail servers with other domains at least partially, for example evguide.nu.
Host names sharing a single IP:
mx1.mailchannels.net points to 18.236.29.166
mx2.mailchannels.net points to 18.236.29.166
Host names that point to 18.236.29.166: mx1.mailchannels.net and mx2.mailchannels.net