www.coreoptics.com - robtex.com

www.coreoptics.com

DNSSEC⚠️ Not signed
A2001:420:1101:1::b🇺🇸 ASNTTCISCO2001:420:1100::/41 170 West Tasman Drive San Jose CA 95134 United States
PTRredirect.cisco.com
A72.163.4.154🇺🇸 ASNTTCISCO72.163.4.0/24 170 West Tasman Drive San Jose CA 95134 United States

coreoptics.com

DNSSEC⚠️ Not signed
A2001:420:1101:1::b🇺🇸 ASNTTCISCO2001:420:1100::/41 170 West Tasman Drive San Jose CA 95134 United States
A72.163.4.154🇺🇸 ASNTTCISCO72.163.4.0/24 170 West Tasman Drive San Jose CA 95134 United States
NSns1.cisco.com ⭐
NSns2.cisco.com
NSns3.cisco.com
MXrcdn-mx-01.cisco.com ⭐
MXaer-mx-01.cisco.com(15)
MXalln-mx-01.cisco.com(15)
TXTv=spf1 ip4:62.146.143.20 mx ~all
SOAns1.cisco.compostmaster@cisco.com serial=12

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DNS History

2 records (2 active, 0 former)

20162017201820192020202120222023202420252026A2001:420:1101:1::b72.163.4.154
●A2001:420:1101:1::b2015-06-08 → 2026-04-12 · 2 obs
● 2015-06-08 20:06:04
● 2026-04-12 01:55:30
●A72.163.4.1542015-06-08 → 2026-04-12 · 2 obs
● 2015-06-08 20:06:04
● 2026-04-12 01:55:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
coreoptics.comns1.cisco.com, ns2.cisco.com, ns3.cisco.com6 records

✅ 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 coreoptics.com (unsigned zone)

⏱️ Timing

Total: 127ms | Queries: -

📄 Records

TypeCountSample Data
A172.163.4.154
AAAA12001:420:1101:1::b

📌 Glue Records Collected

Total: 6

Out-of-bailiwick: 6 (ns1.cisco.com, ns1.cisco.com, ns2.cisco.com...)

Analysis

IP Addresses

www.coreoptics.com points to two IP numbers: 2001:420:1101:1::b and 72.163.4.154.

Other host names, for instance meetingplace.net, ironport.com.pt, cisco.at, ciscosystems.vr.it and cisco.com.kw share IP numbers with www.coreoptics.com.