open-tech.cz - robtex.com
open-tech.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2a01:4f9:5a:2ac8::2🇩🇪 Hetzner2a01:4f9::/32 HETZNER-IPv6-BLK | ||||||
| PTR | pfsense.cz | ||||||
| A | 65.109.53.95🇫🇮 Hetzner65.109.0.0/16 HETZNER-DC | ||||||
| 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 | open-tech.cz ⭐ 🔒 | ||||||
| A | 2a01:4f9:5a:2ac8::2🇩🇪 Hetzner2a01:4f9::/32 HETZNER-IPv6-BLK | ||||||
| PTR | pfsense.cz | ||||||
| A | 65.109.53.95🇫🇮 Hetzner65.109.0.0/16 HETZNER-DC | ||||||
| PTR | pfsense.cz | ||||||
| TXT | v=spf1 a mx -all | ||||||
| TXT | google-site-verification=ETf1AfX6T3QYUHYAlhsKwb0DykpXEZzIouD5OwFcbYM | ||||||
| SOA | ns1.websupport.czadmin@websupport.cz serial=1762585500 | ||||||
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=1774626437 | ||||||
MX for
open-tech.cz |
Same first word
Similar names
DNS History
13 records (6 active, 7 former)
○NSalfa.ns.active24.cz2015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
○NSbeta.ns.active24.cz2015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
○NSgama.ns.active24.sk2015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
●NSns1.websupport.cz2026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 16:04:44
●NSns2.websupport.cz2026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 16:04:44
●NSns3.websupport.eu2026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 16:04:44
○MXdione.smejdil.cz2015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
○MXmx.smtp.cz2015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
●MXopen-tech.cz2026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 16:04:44
○A130.185.178.402015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
●A2a01:4f9:5a:2ac8::22026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 16:04:44
○A2a03:b280::216:3eff:fe00:3282015-04-14 → 2017-01-06 · 3 obs
● 2017-01-06 18:29:12
○ 2026-03-27 16:04:44
●A65.109.53.952026-03-27 → 2026-03-27 · 2 obs
● 2026-03-27 16:04:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | c.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz | - |
| open-tech.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.13
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: 671ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 65.109.53.95 |
| AAAA | 1 | 2a01:4f9:5a:2ac8::2 |
| NS | 3 | ns1.websupport.cz, ns2.websupport.cz... |
| MX | 1 | open-tech.cz (pri: 10) |
| TXT | 2 | v=spf1 a mx -all, google-site-verification=ETf1AfX6T3QYUHY |
| SOA | 1 | ns1.websupport.cz admin.websupport.cz |
Analysis
Mail Server Role
For open-tech.cz, the mail server is open-tech.cz.
IP Addresses
open-tech.cz resolves to two IP numbers: 2a01:4f9:5a:2ac8::2 and 65.109.53.95.
Other host names, for instance pfsense.cz, share IP numbers with open-tech.cz.
Name Servers
open-tech.cz is delegated to three name servers ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.
open-tech.cz at least partially shares name servers with other domains, for instance hariom.com, mkfrydek.cz, saldehco.com, seidel.cz and kostickyshop.cz.
These name servers are commonly used with ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.
Host names with two IP numbers:
ns1.websupport.cz points to: 2a10:bbc0::11 and 45.10.97.11.
ns2.websupport.cz points to: 2a02:250:3::12 and 185.71.159.12.
ns3.websupport.eu points to: 2a10:bbc0::13 and 45.10.97.13.
Mail Servers
open-tech.cz is served by a single mail server, open-tech.cz.
open-tech.cz resolves to two IP numbers: 2a01:4f9:5a:2ac8::2 and 65.109.53.95.