MASS GENERAL BRIGHAM INCORPORATED

Mass General Brigham Incorporated
Data as of 2026-08-09
GLEIF verified
LEI
5493007Z86EDN0QFYU66
Registered name
MASS GENERAL BRIGHAM INCORPORATED
Jurisdiction
US-MA
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks6 · 197,120 IPv4 addresses
Cluster ID218142136
RegistryBGP
Owner jurisdictionUS-MA
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 5493007Z86EDN0QFYU66
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

2 weekly snapshots · JSON
7 +1 netblocks since 2026-07-26
2026-07-26 peak 7 2026-08-09

IP Ranges (6)

⬇ export CSV
CIDR Org name Registry Status Confidence
50.216.106.0/24 Mass General Brigham Incorporated BGP ANNOUNCED ● high
132.183.0.0/16 Mass General Brigham Incorporated BGP ANNOUNCED ● high
155.52.0.0/16 Mass General Brigham Incorporated BGP ANNOUNCED ● high
160.72.231.0/24 Mass General Brigham Incorporated BGP ANNOUNCED ● high
170.223.0.0/16 Mass General Brigham Incorporated ARIN DIRECT ALLOCATION ● high
170.223.13.0/24 Mass General Brigham Incorporated BGP ANNOUNCED ● high

Domains hosted in this network

what's this?
harvard.edu partners.org massgeneralbrigham.org masseyeandear.org massgeneral.org brighamandwomens.org

Network trust

what's this?
RPKI hygiene: D how networks compare →
28.6% of checked blocks have valid RPKI ROA coverage (2 of 7)
Possible discrepancies (1)

These blocks are registered to Mass General Brigham Incorporated but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

50.216.106.0/24 /24 authorized for AS7015 — Comcast Cable Communications, LLC

NIC Handles

AS40831 CHENN25-ARIN MCCAN128-ARIN MCCAN128-ARIN PHS-8 SEVIG5-ARIN ZP106-ARIN