`vpnconcentrator.com`

DNSSEC	⚠️ Not signed
NS	`ns1.cisco.com` ⚠️ Not in zone NS records
		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` ⚠️ Not in zone NS records
		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`

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1778448821

Same first word

vpnconcentrator.com

DNS History

2 records (2 active, 0 former)

●NSns1.cisco.com2007-10-28 → 2026-05-10 · 4 obs

● 2007-10-28 18:17:38
○ 2015-06-28 04:43:32
● 2026-05-03 12:41:46
● 2026-05-10 21:51:52

●NSns2.cisco.com2007-10-28 → 2026-05-10 · 4 obs

● 2007-10-28 18:17:38
○ 2015-06-28 04:43:32
● 2026-05-03 12:41:46
● 2026-05-10 21:51:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
vpnconcentrator.com	ns1.cisco.com, ns2.cisco.com	4 records

✅ Authoritative Response

Server:64.102.255.44

NS records: ns1.cisco.com, ns2.cisco.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for vpnconcentrator.com (unsigned zone)

⏱️ Timing

Total: 211ms | Queries: -

📄 Records

Type	Count	Sample Data

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.cisco.com, ns1.cisco.com, ns2.cisco.com...)

Analysis

Name Servers

vpnconcentrator.com is delegated to two name servers ns1.cisco.com and ns2.cisco.com.

vpnconcentrator.com shares the same name server setup as other domains, for instance ciscotelco.net, vpn-concentrator.com, femtoapps.org, callway.net and webex.xn--fiqs8s.

vpnconcentrator.com at least partially shares name servers with other domains, for instance 102.64.in-addr.arpa, ccda.biz, ihomealliance.com, xn--tckhg.net and 36.128.216.in-addr.arpa.

these name servers are commonly used alongside ns3.cisco.com.

Host names with two IP numbers:

The host name ns1.cisco.com points to 2001:420:1101:6::a and 72.163.5.201; the host name ns2.cisco.com points to 2001:420:2041:5000::a and 64.102.255.44.

vpnconcentrator.com - robtex.com