cerfi.cz - robtex.com
cerfi.cz
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=1784459842 | ||||||
Same first word
cerfi.fr |
cerfi.ie |
cerfi.cz |
cerfi.com.mx |
cerfi.es |
cerfi.bf |
cerfi.com |
cerfi.net |
cerfi.de |
cerfi.ru |
cerfi.us |
cerfi.ch |
Similar names
DNS History
10 records (5 active, 5 former)
○NSdns.globvill.de2015-05-30 → 2016-08-08 · 4 obs
● 2016-08-08 12:45:38
○ 2026-06-13 09:11:54
○ 2026-07-19 11:37:10
○NSdns.voerde.globvill.de2015-05-30 → 2016-08-08 · 4 obs
● 2016-08-08 12:45:38
○ 2026-06-13 09:11:54
○ 2026-07-19 11:37:10
●NSns1.brandshelter.com2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 09:11:54
● 2026-07-19 11:37:10
●NSns2.brandshelter.de2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 09:11:54
● 2026-07-19 11:37:10
●NSns3.brandshelter.info2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 09:11:54
● 2026-07-19 11:37:10
●NSns4.brandshelter.net2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 09:11:54
● 2026-07-19 11:37:10
●NSns5.brandshelter.us2026-06-13 → 2026-07-19 · 3 obs
● 2026-06-13 09:11:54
● 2026-07-19 11:37:10
○A2001:40b8::f012016-03-20 → 2016-08-08 · 5 obs
● 2016-03-20 10:40:14
● 2016-08-08 12:45:38
○ 2026-06-13 09:11:54
○ 2026-07-19 11:37:10
○A212.20.161.12016-03-20 → 2016-08-08 · 5 obs
● 2016-03-20 10:40:14
● 2016-08-08 12:45:38
○ 2026-06-13 09:11:54
○ 2026-07-19 11:37:10
○A212.20.161.592015-05-30 → 2015-12-20 · 4 obs
● 2015-12-20 06:07:10
○ 2016-03-20 10:40:14
○ 2026-07-19 11:37:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| cerfi.cz | ns1.brandshelter.com, ns4.brandshelter.net, ns3.brandshelter.info, ns2.brandshelter.de... | - |
✅ Authoritative Response
Server:193.227.117.9
NS records: ns1.brandshelter.com, ns4.brandshelter.net, ns3.brandshelter.info, ns2.brandshelter.de, ns5.brandshelter.us
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cerfi.cz (unsigned zone)
⏱️ Timing
Total: 1169ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 5 | ns4.brandshelter.net, ns5.brandshelter.us... |
| SOA | 1 | ns1.brandshelter.com tech.brandshelter.c |
Analysis
Name Servers
The authoritative name servers for cerfi.cz are ns1.brandshelter.com, ns2.brandshelter.de, ns3.brandshelter.info and two others.
There is at least partial name server overlap between cerfi.cz and other domains — xn--behrdenkennziffer-1zb.de, eebok.com, seronofond.org and two more among them.
These name servers are routinely co-deployed with the name servers ns4.brandshelter.net, ns5.brandshelter.us, ns1.prncpm.com and two others.
Hosts with two IP numbers each:
ns1.brandshelter.com has two IP addresses: 193.227.117.9 and 2a04:2b00:14cc::9.
ns2.brandshelter.de has two IP addresses: 194.50.187.11 and 2a04:2b00:14dd::11.
ns3.brandshelter.info has two IP addresses: 194.0.182.12 and 2a04:2b00:14ee::12.
ns4.brandshelter.net has two IP addresses: 193.227.117.10 and 2a04:2b00:14cc::10.
ns5.brandshelter.us has two IP addresses: 194.50.187.14 and 2a04:2b00:14dd::14.