ff1.cz - robtex.com
ff1.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2a00:4b40:aaaa:2005::7🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32 | ||||||
| A | 37.9.175.165🇸🇰 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=1774006796 | ||||||
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=1786225641 | ||||||
Same first word
Similar names
DNS History
18 records (7 active, 11 former)
○NSns.gransy.com2016-12-19 → 2016-12-19 · 3 obs
○ 2018-07-06 10:13:44
○ 2026-08-08 22:12:44
○NSns1.netio.cz2018-07-06 → 2018-07-06 · 4 obs
● 2018-07-06 10:13:44
○ 2026-05-01 08:59:38
○ 2026-08-08 22:12:44
●NSns1.websupport.cz2026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
○NSns2.gransy.com2016-12-19 → 2016-12-19 · 3 obs
○ 2018-07-06 10:13:44
○ 2026-08-08 22:12:44
○NSns2.netio.cz2018-07-06 → 2018-07-06 · 4 obs
● 2018-07-06 10:13:44
○ 2026-05-01 08:59:38
○ 2026-08-08 22:12:44
●NSns2.websupport.cz2026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
○NSns3.gransy.com2016-12-19 → 2016-12-19 · 3 obs
○ 2018-07-06 10:13:44
○ 2026-08-08 22:12:44
○NSns3.netio.cz2018-07-06 → 2018-07-06 · 4 obs
● 2018-07-06 10:13:44
○ 2026-05-01 08:59:38
○ 2026-08-08 22:12:44
●NSns3.websupport.eu2026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
○NSns4.gransy.com2016-12-19 → 2016-12-19 · 3 obs
○ 2018-07-06 10:13:44
○ 2026-08-08 22:12:44
○NSns5.gransy.com2016-12-19 → 2016-12-19 · 3 obs
○ 2018-07-06 10:13:44
○ 2026-08-08 22:12:44
○MXmail.ff1.cz2016-12-19 → 2018-07-06 · 4 obs
● 2018-07-06 10:13:44
○ 2026-05-01 08:59:38
○ 2026-08-08 22:12:44
●MXmx10.active24.cz2026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
●MXmx20.active24.cz2026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
○A185.25.184.1352018-07-06 → 2018-07-06 · 4 obs
● 2018-07-06 10:13:44
○ 2026-05-01 08:59:38
○ 2026-08-08 22:12:44
●A2a00:4b40:aaaa:2005::72026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
●A37.9.175.1652026-05-01 → 2026-08-08 · 3 obs
● 2026-05-01 08:59:38
● 2026-08-08 22:12:44
○A77.78.104.32016-12-19 → 2016-12-19 · 3 obs
○ 2018-07-06 10:13:44
○ 2026-08-08 22:12:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| ff1.cz | ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu | - |
✅ Authoritative Response
Server:45.10.97.11
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: 886ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 37.9.175.165 |
| AAAA | 1 | 2a00:4b40:aaaa:2005::7 |
| 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 |
Analysis
IP Addresses
ff1.cz has two IP addresses: 37.9.175.165 and 2a00:4b40:aaaa:2005::7
null.mailgw.cz, ns2.hokejbal-chlumec.cz, delial.cz and two other host names share IP numbers with ff1.cz.
Name Servers
The authoritative name servers for ff1.cz are ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu — three in total.
The name servers of ff1.cz overlap at least partially with those of other domains — among them profonda.cz, vivaprintweb.es, herda.cz and two more.
The name servers ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk are commonly seen alongside these name servers.
ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu all resolve to exactly two IP numbers apiece: ns1.websupport.cz → 45.10.97.11 and 2a10:bbc0::11; ns2.websupport.cz → 185.71.159.12 and 2a02:250:3::12; ns3.websupport.eu → 45.10.97.13 and 2a10:bbc0::13.
Mail Servers
Mail for ff1.cz is handled by two mail servers — mx10.active24.cz and mx20.active24.cz.
ff1.cz uses an identical mail server configuration to several other domains — among them jakubsramek.com, ttlonline.cz, streetjoy.ro and two more.
ff1.cz has mail servers in common with other domains — hereaftertheart.com being one example.
The two host names mx10.active24.cz and mx20.active24.cz each have a pair of IP addresses: mx10.active24.cz has 45.13.137.85 and 2a00:4b40:aaaa:2101:45:13:137:85, and mx20.active24.cz has 45.13.137.86 and 2a00:4b40:aaaa:2101:45:13:137:86.