fishr.cz - robtex.com
fishr.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2a00:4b40:aaaa:2005::6🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 37.9.175.164🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24 | ||||||
| NS | ns1.websupport.cz ⭐ | ||||||
| A | 2a10:bbc0::11🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns1.websupport.eu | ||||||
| A | 45.10.97.11🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns1.websupport.eu | ||||||
| NS | ns2.websupport.cz | ||||||
| A | 2a02:250:3::12🇸🇪 ACTIVE24-AS2a02:250:3::/48 | ||||||
| PTR | ns2.websupport.eu | ||||||
| A | 185.71.159.12🇸🇪 ACTIVE24-AS185.71.159.0/24 | ||||||
| PTR | ns2.websupport.eu | ||||||
| NS | ns3.websupport.eu | ||||||
| A | 2a10:bbc0::13🇨🇿 ACTIVE24-AS2a10:bbc0::/32 | ||||||
| PTR | ns3.websupport.eu | ||||||
| A | 45.10.97.13🇨🇿 ACTIVE24-AS45.10.97.0/24 | ||||||
| PTR | ns3.websupport.eu | ||||||
| MX | mx10.active24.cz ⭐ | ||||||
| A | 2a00:4b40:aaaa:2101:45:13:137:85🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 45.13.137.85🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24 | ||||||
| PTR | mx10.active24.cz | ||||||
| MX | mx20.active24.cz(100) | ||||||
| A | 2a00:4b40:aaaa:2101:45:13:137:86🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 45.13.137.86🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24 | ||||||
| PTR | mx20.active24.cz | ||||||
| TXT | v=spf1 a mx include:_spf.websupport.cz -all | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1777762304 | ||||||
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=1785763045 | ||||||
Subdomains
mail.fishr.cz |
Same first word
Similar names
DNS History
15 records (7 active, 8 former)
○NSalfa.ns.active24.cz2015-08-24 → 2026-02-16 · 4 obs
● 2026-02-16 11:39:18
○ 2026-06-11 08:20:06
○ 2026-08-03 13:30:44
○NSbeta.ns.active24.cz2015-08-24 → 2026-02-16 · 4 obs
● 2026-02-16 11:39:18
○ 2026-06-11 08:20:06
○ 2026-08-03 13:30:44
○NSgama.ns.active24.sk2015-08-24 → 2026-02-16 · 4 obs
● 2026-02-16 11:39:18
○ 2026-06-11 08:20:06
○ 2026-08-03 13:30:44
○NSns.dns4.cz2015-08-24 → 2026-02-16 · 4 obs
● 2026-02-16 11:39:18
○ 2026-06-11 08:20:06
○ 2026-08-03 13:30:44
●NSns1.websupport.cz2026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
●NSns2.websupport.cz2026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
●NSns3.websupport.eu2026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
○MXmail.fishr.cz2015-08-24 → 2016-06-26 · 4 obs
● 2016-06-26 09:14:50
○ 2016-07-15 09:24:24
○ 2026-08-03 13:30:44
○MXmail.savier.cz2016-07-15 → 2026-02-16 · 5 obs
● 2016-07-15 09:24:24
● 2026-02-16 11:39:18
○ 2026-06-11 08:20:06
○ 2026-08-03 13:30:44
●MXmx10.active24.cz2026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
●MXmx20.active24.cz2026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
○A194.212.80.82016-07-15 → 2026-02-16 · 5 obs
● 2016-07-15 09:24:24
● 2026-02-16 11:39:18
○ 2026-06-11 08:20:06
○ 2026-08-03 13:30:44
○A194.228.111.1422015-08-24 → 2016-06-26 · 4 obs
● 2016-06-26 09:14:50
○ 2016-07-15 09:24:24
○ 2026-08-03 13:30:44
●A2a00:4b40:aaaa:2005::62026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
●A37.9.175.1642026-06-11 → 2026-08-03 · 3 obs
● 2026-06-11 08:20:06
● 2026-08-03 13:30:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | 8 records |
| fishr.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:185.71.159.12
NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 999ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.9.175.164 |
| AAAA | 1 | 2a00:4b40:aaaa:2005::6 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 2 | mx10.active24.cz (pri: 10), mx20.active24.cz (pri: 100) |
| TXT | 1 | v=spf1 a mx include:_spf.websupport.cz - |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
📌 Glue Records Collected
Total: 8
In-bailiwick: 8 (a.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz...)
Analysis
Hierarchy
fishr.cz is the parent zone for mail.fishr.cz.
IP Addresses
fishr.cz resolves to the IP addresses 37.9.175.164 and 2a00:4b40:aaaa:2005::6
Additional host names — www.mk-kraslice.cz, index.rss.bossard.sk, www.topobchody.cz and two others — share IP numbers with fishr.cz.
Name Servers
fishr.cz is delegated to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
fishr.cz partially shares its NS delegation with several other domains, including matypo.cz, odtah-brno.eu, novasoft.cz and two others.
ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu each resolve to two IP addresses: ns1.websupport.cz resolves to 45.10.97.11 and 2a10:bbc0::11; ns2.websupport.cz resolves to 185.71.159.12 and 2a02:250:3::12; ns3.websupport.eu resolves to 45.10.97.13 and 2a10:bbc0::13.
Mail Servers
fishr.cz has two mail servers: mx10.active24.cz and mx20.active24.cz.
fishr.cz shares the same mail server setup as other domains, including denemark.info, bed.cz, ijek.org and two others.
mx10.active24.cz and mx20.active24.cz each resolve to two IP addresses: mx10.active24.cz points to 45.13.137.85 and 2a00:4b40:aaaa:2101:45:13:137:85, while mx20.active24.cz points to 45.13.137.86 and 2a00:4b40:aaaa:2101:45:13:137:86.