AS40831 — PHS

AS40831 announces 4 IPv4 prefixes covering 196,864 addresses and 0 IPv6 prefixes.

About this network

The AS handle PHS is held by Mass General Brigham Incorporated.

What it's used for

• The address space carries internal corporate infrastructure for a major healthcare system, evidenced by netnames MGH-ETHER (Massachusetts General Hospital), DFCINET (Dana-Farber Cancer Institute), and PHCS-B (Mass General Brigham Incorporated).
• The inventory consists of 11 IPv4 prefixes totaling 196,864 addresses, with a low neighbour count of 5, indicating a self-contained internal estate rather than a transit or access network.
• Traffic from this AS represents internal communications, clinical systems, and administrative endpoints for the integrated health system's campuses and research facilities.

Notable

• Registrants align with the announcer, including Massachusetts General Hospital, Dana-Farber Cancer Institute, Mass General Brigham Incorporated, and Partners Healthcare.
• Mass General Brigham was formerly known as Partners HealthCare, a rename that explains the presence of the PHS handle and Partners Healthcare registrant entries.
• The address inventory is finely subdivided, with the 170.223.0.0/17 block split into multiple smaller prefixes, reflecting site-by-site segmentation within the corporate estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 132.183.0.0/16
• 155.52.0.0/16
• 160.72.231.0/24
• 170.223.0.0/16

Upstream networks

• AS40127 Longwood Medical and Academic Area (LMA)
• AS46887 Crown Castle Fiber LLC
• AS49915 Megaport (UK) Limited

Downstream networks

• AS394784 Massachusetts Eye and Ear Infirmary

Adjacent networks

• AS40127 Longwood Medical and Academic Area (LMA)
• AS394784 Massachusetts Eye and Ear Infirmary
• AS46887 Crown Castle Fiber LLC
• AS49915 Megaport (UK) Limited