chrastava.org - robtex.com
chrastava.org
| 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 | 54.187.177.89🇺🇸 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 | 54.69.1.140🇺🇸 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 | ||||||
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1778963853 | ||||||
Same first word
Similar names
DNS History
7 records (5 active, 2 former)
○MXmail.chrastava.org2015-06-28 → 2016-12-31 · 4 obs
● 2016-12-31 14:02:52
○ 2020-01-17 09:03:16
○ 2026-05-16 20:51:44
○MXmx.web4u.cz2020-01-17 → 2020-01-17 · 4 obs
● 2020-01-17 09:03:16
○ 2026-04-06 17:49:02
○ 2026-05-16 20:51:44
●MXmx1.mailchannels.net2026-04-06 → 2026-05-16 · 3 obs
● 2026-04-06 17:49:02
● 2026-05-16 20:51:44
●MXmx2.mailchannels.net2026-04-06 → 2026-05-16 · 3 obs
● 2026-04-06 17:49:02
● 2026-05-16 20:51:44
●A81.91.86.112015-06-28 → 2026-05-16 · 2 obs
● 2026-05-16 20:51:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| chrastava.org | ns.web4u.cz, ns2.web4u.cz | - |
✅ Authoritative Response
Server:185.14.224.241
NS records: ns.web4u.cz, ns2.web4u.cz
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for chrastava.org (unsigned zone)
⏱️ Timing
Total: 837ms | 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
IP Addresses
chrastava.org points to one IP number: 81.91.86.11.
autostyl-janko.cz, brzdy-racing.cz, unassigned-81-91-84-57.web4u.cz, unassigned-81-91-86-44.web4u.cz and inkousty.eu have identical A records with chrastava.org.
Name Servers
chrastava.org is delegated to two name servers, ns2.web4u.cz and ns.web4u.cz.
chrastava.org shares the same name server setup with other domains, for instance gatecrasher.cz, gisb.cz, akkg.cz, boecker-group.cz and travelsupport.cz.
Host names with two IP numbers:
The host name ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12.
ns.web4u.cz directs to 2001:1568:fd::241 and 185.14.224.241.
Mail Servers
chrastava.org is handled by two mail servers, mx1.mailchannels.net and mx2.mailchannels.net.
chrastava.org has the same mail server setup as other domains, for instance rattlesnakespeedway.com, cncmaras.work, reportassist.com, cacsystems.cz and goholidays.cz.
Host names with one IP number:
The host name mx1.mailchannels.net points to: 54.187.177.89.
The host name mx2.mailchannels.net points to: 54.69.1.140.