Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS40831

Announcement observedARIN

Mass General Brigham Incorporated · PHS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/3/2026, 10:16:01Snapshot expired

View network topology RDAP registration

ASN: AS40831
Registration country: United States
Name: Mass General Brigham Incorporated
Abbreviation: PHS
Registration date: 7/25/2017, 21:09:56
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
132.183.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/3/2026, 00:00:00	✓	×	Currently valid
155.52.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/3/2026, 00:00:00	✓	×	Currently valid
160.72.231.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/3/2026, 00:00:00	✓	×	Currently valid
170.223.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/3/2026, 00:00:00	✓	×	Currently valid
170.223.13.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/3/2026, 00:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Mass General Brigham Incorporated
RIR: ARIN
Registration country: United States
Registration date: 7/25/2017, 21:09:56
Abuse contact: tmccann@mgb.org

Snapshot trend

10/3/2026, 10:16:015 v40 v63 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn