`ciscosystems.ac`

DNSSEC	⚠️ Not signed
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`
SOA	`ns1.cisco.com`postmaster@cisco.com serial=2

`ac`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.nic.ac` ⭐
	NS	`a2.nic.ac`
	NS	`b0.nic.ac`
	NS	`c0.nic.ac`
	SOA	`a0.nic.ac`hostmaster@donuts.email serial=1775134955

Same first word

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Similar names

DNS History

3 records (3 active, 0 former)

●NSns1.cisco.com2026-03-31 → 2026-04-02 · 2 obs

● 2026-03-31 13:57:16
● 2026-04-02 13:17:08

●NSns2.cisco.com2026-03-31 → 2026-04-02 · 2 obs

● 2026-03-31 13:57:16
● 2026-04-02 13:17:08

●NSns3.cisco.com2026-03-31 → 2026-04-02 · 2 obs

● 2026-03-31 13:57:16
● 2026-04-02 13:17:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ac	c0.nic.ac, a2.nic.ac, b0.nic.ac, a0.nic.ac	8 records
ciscosystems.ac	ns3.cisco.com, ns1.cisco.com, ns2.cisco.com	-

✅ Authoritative Response

Server:173.37.146.41

NS records: ns3.cisco.com, ns1.cisco.com, ns2.cisco.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ciscosystems.ac (unsigned zone)

⏱️ Timing

Total: 344ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`ns3.cisco.com, ns1.cisco.com...`
SOA	1	`ns1.cisco.com postmaster.cisco.com`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (c0.nic.ac, c0.nic.ac, a2.nic.ac...)

Analysis

Name Servers

ciscosystems.ac is delegated to three name servers: ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.

ciscosystems.ac at least partially shares name servers with other domains, for instance ciscocafe.com, versastack.com, ciscopulse.net, bgl-ads-078.cisco.com and ios.wiki.

Host names with two IP numbers:

Host ns1.cisco.com points to 2001:420:1101:6::a and 72.163.5.201.

Host ns2.cisco.com points to 2001:420:2041:5000::a and 64.102.255.44.

Host ns3.cisco.com points to 2001:420:1201:7::a and 173.37.146.41.

ciscosystems.ac - robtex.com

ciscosystems.ac

ac

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Name Servers

`ciscosystems.ac`

`ac`