AS102
U.S. National Science Foundation
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 National Science Foundation
The United States National Science Foundation (NSF) is an independent agency of the United States federal government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National Institutes of Health.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.150.0.0/16 | 65.5K |
0.2%
|
U.S. National Science Foundation | US | Virginia | Alexandria |
| 192.12.209.0/24 | 256 |
0.4%
|
U.S. National Science Foundation | US | District of Columbia | Washington |
| 198.181.231.0/24 | 256 |
0.0%
|
U.S. National Science Foundation | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS102 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 |
|---|---|---|
| 128.150.0.0/16 | 10,332 | 2026-07-25 13:27:02 |
| 192.12.209.0/24 | 10,316 | 2026-07-25 12:04:21 |
| 198.181.231.0/24 | 10,312 | 2026-07-25 12:04:21 |
Frequently Asked Questions
What is AS102?
AS102 is an Autonomous System Number assigned to U.S. National Science Foundation. 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 AS102 announce?
AS102 announces 66.0K IPv4 addresses distributed across 3 routed CIDR prefixes. The network is registered in United States.
Who operates AS102?
AS102 is operated by U.S. National Science Foundation. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS102 registered in?
AS102 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
