AS36519 CISCO SYSTEMS, INC.

CISCO-TTNA - CISCO SYSTEMS, INC. · registered in the United States

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in United States#10,427largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#48,308of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS36519 in ASN lookup Look up an IP in this network (172.98.16.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

172.98.16.0/23

IPv6 prefixes

All 1 prefix.

2602:80a:f000::/48

Other ASNs named CISCO SYSTEMS, INC.

4 other networks use the same organisation name; together with AS36519 they announce 1,149,184 IPv4 addresses.

ASNNameIPv4 addresses

AS109CISCOSYSTEMS - CISCO SYSTEMS, INC. US1,141,504

AS398699WCCE - Cisco Systems Inc US3,072

AS396922TGRID-AS - Cisco Systems, Inc. US2,560

AS55219SOURCEFIRE-LABS - Cisco Systems, Inc. US1,536

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ASNNameIPv4 addresses

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AS36232#10426 NEXTGI - Nextgi, LLC.512

AS36811#10428 WIZTECH-INTERNET - Wiztech Internet512

AS39971#10429 BELL-IT-SERVICES - Bell IT Services, Inc.512

AS40263#10430 BCS-1 - Bear Cloud Solutions, Inc.512

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources