AS43
Brookhaven National Laboratory
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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Brookhaven National Laboratory
Brookhaven National Laboratory (BNL) is a United States Department of Energy national laboratory located in Upton, New York, a hamlet of the Town of Brookhaven. It was formally established in 1947 at the site of Camp Upton, a former U.S.
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 130.199.0.0/16 | 65.5K |
0.4%
|
Brookhaven National Laboratory | US | New York | Upton |
| 192.12.15.0/24 | 256 |
44.1%
|
Brookhaven National Laboratory | US | New York | Upton |
| 192.33.128.0/24 | 256 |
21.1%
|
Brookhaven National Laboratory | US | — | — |
| 192.153.161.0/24 | 256 |
5.5%
|
Brookhaven National Laboratory | US | — | — |
| 192.203.218.0/24 | 256 |
14.1%
|
Brookhaven National Laboratory | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS43 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 |
|---|---|---|
| 192.12.15.0/24 | 4,428 | 2026-07-25 16:07:00 |
| 192.153.161.0/24 | 4,417 | 2026-07-25 17:13:09 |
| 192.33.128.0/24 | 4,396 | 2026-07-25 16:06:57 |
| 192.203.218.0/24 | 4,366 | 2026-07-25 16:06:53 |
| 130.199.0.0/16 | 4,343 | 2026-07-25 17:41:30 |
Frequently Asked Questions
What is AS43?
AS43 is an Autonomous System Number assigned to Brookhaven National Laboratory. 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 AS43 announce?
AS43 announces 66.6K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in United States.
Who operates AS43?
AS43 is operated by Brookhaven National Laboratory. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS43 registered in?
AS43 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
