Data as of Nov 10, 2026
Autonomous system

AS18729

Shawmut Design & Construction

Announces 512 addresses in 2 prefixes. None of it is anonymizer space.

Type
Business
US

Announced prefixes

Arrived
PrefixTypeHolderRPKI
50.236.28.0/24
since Sep 2017
BusinessComcast Cable Communications, LLC
64.214.98.0/24
since Nov 2023
BusinessLevel 3 Parent, LLC

Network & history

Routing patterns

How its announcements have moved

Arrivals

Year each prefix's current origin began announcing it