isf.cz - robtex.com
isf.cz
| DNSSEC | ⚠️ Not signed | ||||||
| A | 78.141.239.248🇬🇧 AS-VULTR78.141.224.0/19 Vultr Assigned Prefix | ||||||
| PTR | 78.141.239.248.vultrusercontent.com | ||||||
| NS | ns.parktons.com ⭐ | ||||||
| A | 46.8.8.88🇨🇿 GRANSY46.8.8.0/24 | ||||||
| NS | gamma1.rdrhost.com | ||||||
| A | 78.141.239.248🇬🇧 AS-VULTR78.141.224.0/19 Vultr Assigned Prefix | ||||||
| PTR | 78.141.239.248.vultrusercontent.com | ||||||
| NS | gamma2.rdrhost.com | ||||||
| A | 45.77.230.88🇬🇧 AS-VULTR45.77.224.0/21 Vultr Assigned Prefix | ||||||
| PTR | 45.77.230.88.vultrusercontent.com | ||||||
| MX | mail.parktons.com ⭐ | ||||||
| A | 155.138.212.151🇺🇸 AS-VULTR155.138.192.0/19 Vultr Assigned Prefix | ||||||
| PTR | 155-138-212-151.lum-int.io | ||||||
| SOA | ns.parktons.comroot@parktons.com serial=2617179285 | ||||||
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=1783736241 | ||||||
Same first word
Similar names
DNS History
7 records (5 active, 2 former)
○NS1.dns.felixdomain.cz2015-08-19 → 2021-11-09 · 4 obs
● 2021-11-09 06:50:28
○ 2026-03-09 04:42:26
○ 2026-07-11 02:52:58
○NS2.dns.felixdomain.cz2015-08-19 → 2021-11-09 · 4 obs
● 2021-11-09 06:50:28
○ 2026-03-09 04:42:26
○ 2026-07-11 02:52:58
●NSgamma1.rdrhost.com2026-06-15 → 2026-07-11 · 3 obs
● 2026-06-15 03:09:30
● 2026-07-11 02:52:58
●NSgamma2.rdrhost.com2026-06-15 → 2026-07-11 · 3 obs
● 2026-06-15 03:09:30
● 2026-07-11 02:52:58
●NSns.parktons.com2026-06-15 → 2026-07-11 · 3 obs
● 2026-06-15 03:09:30
● 2026-07-11 02:52:58
●MXmail.parktons.com2026-06-15 → 2026-07-11 · 2 obs
● 2026-07-11 02:52:58
●A78.141.239.2482026-06-15 → 2026-07-11 · 2 obs
● 2026-07-11 02:52:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| isf.cz | gamma1.rdrhost.com, gamma2.rdrhost.com | - |
✅ Authoritative Response
Server:78.141.239.248
NS records: gamma1.rdrhost.com, gamma2.rdrhost.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for isf.cz (unsigned zone)
⏱️ Timing
Total: 3092ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 78.141.239.248 |
| NS | 2 | gamma1.rdrhost.com, gamma2.rdrhost.com |
| MX | 1 | mail.parktons.com (pri: 10) |
| SOA | 1 | ns.parktons.com root.parktons.com |
Analysis
IP Addresses
isf.cz resolves to one IP address: 78.141.239.248.
ksv.cz, hondamch.cz, www.rlc.cz and two other host names share IP numbers with isf.cz.
Name Servers
isf.cz is delegated to three name servers: ns.parktons.com, gamma1.rdrhost.com and gamma2.rdrhost.com.
isf.cz shares at least some of its name servers with other domains, including mail.poker-24.cz, socialsummit.cz, ne.domain.name and two others.
These name servers are frequently seen alongside ns2.parktons.com, beta1.rdrhost.com, beta2.rdrhost.com and 5 other name servers.
ns.parktons.com, gamma1.rdrhost.com and gamma2.rdrhost.com each resolve to a single IP address: ns.parktons.com resolves to 46.8.8.88, gamma1.rdrhost.com resolves to 78.141.239.248 and gamma2.rdrhost.com resolves to 45.77.230.88.
Mail Servers
Mail for isf.cz is handled by a single mail server, mail.parktons.com.
isf.cz uses an identical mail server configuration to several other domains — among them cm.mct01.com, gcloudcs.com.domain.name, mail.facetime.cz and two more.
mail.parktons.com resolves to a single IP number: 155.138.212.151.