cognitive-security.cz - robtex.com
cognitive-security.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=1775135837 | ||||||
Same first word
cognitive-security.eu |
cognitive-security.com |
cognitive-security.net |
cognitive-security.cz |
DNS History
9 records (8 active, 1 former)
○NSedns-aln1-1-l.cisco.com2015-07-22 → 2016-08-21 · 4 obs
● 2016-08-21 22:54:18
○ 2026-03-31 13:55:06
○ 2026-04-02 14:18:12
●MXalt1.aspmx.l.google.com2015-07-22 → 2026-04-02 · 2 obs
● 2026-04-02 14:18:12
●MXalt2.aspmx.l.google.com2015-07-22 → 2026-04-02 · 2 obs
● 2026-04-02 14:18:12
●MXaspmx.l.google.com2015-07-22 → 2026-04-02 · 2 obs
● 2026-04-02 14:18:12
●MXaspmx2.googlemail.com2015-07-22 → 2026-04-02 · 2 obs
● 2026-04-02 14:18:12
●A72.163.4.1542015-07-22 → 2026-04-02 · 2 obs
● 2026-04-02 14:18:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz | - |
| cognitive-security.cz | ns1.cisco.com, ns2.cisco.com, ns3.cisco.com | - |
✅ Authoritative Response
Server:173.37.146.41
NS records: ns1.cisco.com, ns2.cisco.com, ns3.cisco.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cognitive-security.cz (unsigned zone)
⏱️ Timing
Total: 1315ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 72.163.4.154 |
| NS | 3 | ns1.cisco.com, ns2.cisco.com... |
| MX | 4 | alt1.aspmx.l.google.com (pri: 20), aspmx.l.google.com (pri: 10)... |
| SOA | 1 | ns1.cisco.com postmaster.cisco.com |
Analysis
IP Addresses
cognitive-security.cz points to a single IP number: 72.163.4.154.
Other host names, for instance cisco.ba.it, cisco.nu.it, cisco.gr, ciscowebex.hk and ciscosystems.sv.it share IP numbers with cognitive-security.cz.
Name Servers
The delegation for cognitive-security.cz is handled by three name servers: ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.
cognitive-security.cz at least partially shares name servers with other domains, for instance ciscohomelink.mobi, ciscopartnermarketing.com, siliconone.com.cn, jabberv.jp and ciscoinstitute.biz.
Two IP numbers per host:
ns1.cisco.com points to 2001:420:1101:6::a and 72.163.5.201.
ns2.cisco.com points to 2001:420:2041:5000::a and 64.102.255.44.
ns3.cisco.com points to 2001:420:1201:7::a and 173.37.146.41.
Mail Servers
cognitive-security.cz is handled by four mail servers: aspmx2.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
cognitive-security.cz shares mail servers with other domains at least in part, for instance ns500699.ns500693.ns500734.ns500693.ns500693.ns500693.ns500693.ns500588.ns500699.ns500683.ns500683.ns500683.ns500588.ns500693.ns500693.ns500602.dtrkdll.com, ns500731.ns500671.ns500742.ns500731.ns500742.ns500754.ns500754.ns500671.ns500704.ns500688.ns500671.ns500291.ns500291.ns500666.ns500291.ns500131.lustychickser.com, ns500698.ns500758.ns500759.ns500698.ns500735.ns500698.ns500735.ns500698.ns500736.ns500708.ns500708.ns500698.ns500619.ns500652.ns500576.trackreceptor.com, ns500731.ns500671.ns500754.ns500704.ns500704.ns500742.ns500705.ns500704.ns500291.ns500688.tenderladiesbz.com and ns500731.ns500742.ns500742.ns500754.ns500742.ns500671.ns500678.ns500678.ns500666.ns500142.lusty(0x736c7574)z.com.
These mail servers are often used with alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IP numbers:
aspmx2.googlemail.com points to: 2607:f8b0:4023:2801::1b and 192.178.128.26.
aspmx.l.google.com points to: 2a00:1450:4009:c0f::1b and 192.178.223.27.
alt1.aspmx.l.google.com points to: 2800:3f0:4003:c0f::1a and 108.177.123.27.
alt2.aspmx.l.google.com points to: 2a00:1450:4013:c1e::1a and 192.178.213.27.