AS40831
Mass General Brigham Incorporated
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Enterprise allocation +4
- Trust score 69 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 132.183.0.0/16 | 65.5K |
37.0%
|
Mass General Brigham Incorporated | US | Massachusetts | Boston |
| 155.52.0.0/16 | 65.5K |
9.9%
|
Mass General Brigham Incorporated | US | Massachusetts | East Weymouth |
| 170.223.0.0/16 | 65.5K |
29.4%
|
Mass General Brigham Incorporated | US | Massachusetts | Roslindale |
| 50.216.106.0/24 | 256 |
0.0%
|
Mass General Brigham Incorporated | US | — | — |
| 160.72.231.0/24 | 256 |
9.8%
|
Mass General Brigham Incorporated | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS40831 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 160.72.231.0/24 | 12,455 | 2026-07-18 12:01:28 |
| 50.216.106.0/24 | 4,850 | 2026-07-18 11:59:47 |
| 155.52.0.0/16 | 3,536 | 2026-07-18 12:01:25 |
| 170.223.0.0/16 | 3,391 | 2026-07-18 12:01:00 |
| 132.183.0.0/16 | 3,381 | 2026-07-18 12:01:00 |
Frequently Asked Questions
What is AS40831?
AS40831 is an Autonomous System Number assigned to Mass General Brigham Incorporated. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS40831 announce?
AS40831 announces 197.1K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in United States.
Who operates AS40831?
AS40831 is operated by Mass General Brigham Incorporated. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS40831 registered in?
AS40831 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
