AS399937 Cisco Webex LLC

UCMCLOUD - Cisco Webex LLC · registered in the United States

IPv4 addresses3,3285 prefixes · <0.001% of announced IPv4

Rank in United States#5,243largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#17,868of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS399937 in ASN lookup Look up an IP in this network (8.38.216.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

8.38.216.0/24
139.177.84.0/22
139.177.88.0/22
139.177.92.0/23
158.222.48.0/23

Other ASNs named Cisco Webex LLC

2 other networks use the same organisation name; together with AS399937 they announce 345,344 IPv4 addresses.

ASNNameIPv4 addresses

AS13445WEBEX - Cisco Webex LLC US340,736

AS26152WXCCE - Cisco Webex LLC US1,280

Similar-sized networks in United States

ASNNameIPv4 addresses

AS397688#5240 BWINPARTY-US-NV - BWIN.PARTY ENTERTAINMENT (NJ), LLC3,328

AS399378#5241 SMTC-01 - Stratford Mutual Telephone Company3,328

AS399440#5242 AS-HEARTLANDFIBER - Heartland Fiber, Inc.3,328

AS400385#5244 CITIZENS-TELEPHONE-ASN-01 - Citizens Telephone Corporation3,328

AS400666#5245 DOBSON-ASN-02 - Dobson Technologies - Transport and Telecom Solutions, LLC3,328

AS401097#5246 DICKINSON-EDU - Dickinson College3,328

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