Data as of Nov 10, 2026
Autonomous system

AS399937

Cisco Webex LLC

Announces 3,328 addresses in 13 prefixes. None of it is anonymizer space.

Type
Business
US

Announced prefixes

Arrived
PrefixTypeHolderRPKI
8.38.216.0/24
since Jan 2023
BusinessLevel 3 Parent, LLC
139.177.84.0/24
since Nov 2024
Business
139.177.85.0/24
since Dec 2024
Business
139.177.86.0/24
since Mar 2024
Business
139.177.87.0/24
since Apr 2024
Business
139.177.88.0/24
since Jan 2023
Business
139.177.89.0/24
since Jan 2023
Business
139.177.90.0/24
since Jan 2023
Business
139.177.91.0/24
since Dec 2022
Business
139.177.92.0/24
since Dec 2021
Business
139.177.93.0/24
since Dec 2021
Business
158.222.48.0/24
since Jul 2025
BusinessCisco Systems, Inc.
158.222.49.0/24
since Jul 2025
BusinessCisco Systems, Inc.

Network & history

Routing patterns

How its announcements have moved

Arrivals

Year each prefix's current origin began announcing it