about.cisco - robtex.com
about.cisco
| DNSSEC | ⚠️ Not signed | ||||||
| A | 72.163.4.154🇺🇸 ASNTTCISCO72.163.4.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | redirect.cisco.com | ||||||
| NS | ns1.cisco.com ⭐ | ||||||
| A | 2001:420:1101:6::a🇺🇸 ASNTTCISCO2001:420:1100::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns1.cisco.com | ||||||
| A | 72.163.5.201🇺🇸 ASNTTCISCO72.163.0.0/18 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns1.cisco.com | ||||||
| NS | ns2.cisco.com | ||||||
| A | 2001:420:2041:5000::a🇺🇸 ASNTTCISCO2001:420:2000::/35 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns2.cisco.com | ||||||
| A | 64.102.255.44🇺🇸 ASNTTCISCO64.102.0.0/16 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns2.cisco.com | ||||||
| NS | ns3.cisco.com | ||||||
| A | 2001:420:1201:7::a🇺🇸 ASNTTCISCO2001:420:1200::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns3.cisco.com | ||||||
| A | 173.37.146.41🇺🇸 ASNTTCISCO173.37.128.0/19 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns3.cisco.com | ||||||
| TXT | google-site-verification=E85hwqAY-SOb8BUXy0q5SpxqAcjrMGQjSEAyECmhM0o | ||||||
| SOA | ns1.cisco.compostmaster@cisco.com serial=3 | ||||||
cisco
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns1.dns.nic.cisco ⭐ | ||||||
| NS | a.nic.cisco | ||||||
| NS | b.nic.cisco | ||||||
| NS | c.nic.cisco | ||||||
| NS | ns2.dns.nic.cisco | ||||||
| NS | ns3.dns.nic.cisco | ||||||
| SOA | ns1.dns.nic.ciscoadmin@tldns.godaddy serial=1780187823 | ||||||
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●A72.163.4.1542026-05-25 → 2026-05-31 · 2 obs
● 2026-05-31 11:39:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cisco | a.nic.cisco, b.nic.cisco, c.nic.cisco, ns1.dns.nic.cisco... | 12 records |
| about.cisco | ns1.cisco.com, ns2.cisco.com, ns3.cisco.com | - |
✅ Authoritative Response
Server:64.102.255.44
NS records: ns1.cisco.com, ns2.cisco.com, ns3.cisco.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for about.cisco (unsigned zone)
⏱️ Timing
Total: 1577ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 72.163.4.154 |
| NS | 3 | ns3.cisco.com, ns1.cisco.com... |
| TXT | 1 | google-site-verification=E85hwqAY-SOb8BU |
| SOA | 1 | ns1.cisco.com postmaster.cisco.com |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.cisco, b.nic.cisco, c.nic.cisco...)
Analysis
IP Addresses
about.cisco has exactly one IP address — 72.163.4.154.
ciscopowered.com, cisco.int.vn, cisco.bg plus two other host names have IP numbers in common with about.cisco.
Name Servers
about.cisco has three name servers — ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.
There is at least partial name server overlap between about.cisco and other domains — ciscowebexmeeting.com, jabberv.hk, ciscosistemi.org and two more among them.
Each of ns1.cisco.com, ns2.cisco.com and ns3.cisco.com points to two IP numbers. ns1.cisco.com points to 72.163.5.201 and 2001:420:1101:6::a. ns2.cisco.com points to 64.102.255.44 and 2001:420:2041:5000::a. ns3.cisco.com points to 173.37.146.41 and 2001:420:1201:7::a.