AS40831 PHS - Mass General Brigham Incorporated
🇺🇸ARINassigned
Announced Prefixes (BGP)
6total
6 IPv40 IPv6
IPv4 Addresses
Allocated (RIR)196,608
Announced (BGP)197,376
IPv6 Addresses
Allocated (RIR)4.9×10²⁷
Announced (BGP)0
Announced Prefixes
(BGP)6|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | Other IRR | 2026-10-10 | |
| No ROA | Other IRR | 2026-10-10 | |
| No ROA | Other IRR | 2026-10-10 | |
| No ROA | Other IRR | 2026-10-10 | |
| No ROA | Other IRR | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 |
Allocated Prefixes
(RIR)4Prefix | Country | RIR | Status |
|---|---|---|---|
| 132.183.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 155.52.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 170.223.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 2620:191::/36 | 🇺🇸 US | ARIN | allocated |
All 6 announced prefixes of AS40831 →
BGP Neighbours
(seen in AS paths)Upstreams (4)
Networks AS40831 hands its own prefixes to: transit providers, or peers at an exchange.
Downstreams (1)
Networks whose own prefixes AS40831 passes on: usually its customers.
- AS394784Massachusetts Eye And Ear Infirmary2
ASPA
No ASPA
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- ASPA explainedWhy AS40831 should publish an ASPA object
- IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/40831Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/40831" | jq