AS3999
The Pennsylvania State University
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
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About Pennsylvania State University
The Pennsylvania State University is a public state-related land-grant research university with campuses and facilities throughout Pennsylvania, United States. Founded in 1855 as the Farmers' High School of Pennsylvania, Penn State was named the state's first land-grant university eight years later.
Network profile
Source: PeeringDB →AS3999 — global IP footprint
Cities where AS3999 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 104.38.0.0/15 | 131.1K |
5.6%
|
The Pennsylvania State University | US | Pennsylvania | Philadelphia |
| 128.118.0.0/16 | 65.5K |
24.5%
|
The Pennsylvania State University | US | Pennsylvania | Port Matilda |
| 130.203.0.0/16 | 65.5K |
2.8%
|
The Pennsylvania State University | US | Pennsylvania | State College |
| 146.186.0.0/16 | 65.5K |
18.4%
|
The Pennsylvania State University | US | Pennsylvania | Monaca |
| 150.231.0.0/16 | 65.5K |
0.1%
|
The Pennsylvania State University | US | Pennsylvania | Hummelstown |
| 66.71.0.0/17 | 32.8K |
7.3%
|
The Pennsylvania State University | US | Pennsylvania | Reading |
| 75.102.64.0/18 | 16.4K |
0.2%
|
The Pennsylvania State University | US | Pennsylvania | Collegeville |
| 192.5.158.0/23 | 512 |
29.1%
|
The Pennsylvania State University | US | — | — |
| 192.5.160.0/23 | 512 |
0.0%
|
The Pennsylvania State University | US | — | — |
| 192.5.157.0/24 | 256 |
0.0%
|
The Pennsylvania State University | US | Pennsylvania | State College |
| 192.112.253.0/24 | 256 |
0.0%
|
The Pennsylvania State University | US | Pennsylvania | State College |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS3999 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 |
|---|---|---|
| 192.5.157.0/24 | 16,341 | 2026-07-23 19:06:07 |
| 66.71.0.0/17 | 15,924 | 2026-07-23 19:14:25 |
| 75.102.64.0/18 | 15,905 | 2026-07-23 19:14:54 |
| 192.112.253.0/24 | 15,834 | 2026-07-23 19:06:07 |
| 192.5.160.0/24 | 15,824 | 2026-07-23 19:06:07 |
| 128.118.0.0/16 | 15,823 | 2026-07-23 19:06:07 |
| 146.186.0.0/16 | 15,812 | 2026-07-23 19:06:07 |
| 130.203.0.0/16 | 15,811 | 2026-07-23 19:06:07 |
| 192.5.161.0/24 | 15,810 | 2026-07-23 19:06:07 |
| 192.5.158.0/24 | 15,805 | 2026-07-23 19:06:07 |
| 192.5.159.0/24 | 15,769 | 2026-07-23 19:06:07 |
| 104.38.0.0/15 | 15,707 | 2026-07-23 19:06:07 |
| 150.231.0.0/16 | 15,670 | 2026-07-23 19:06:07 |
Frequently Asked Questions
What is AS3999?
AS3999 is an Autonomous System Number assigned to The Pennsylvania State University. 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 AS3999 announce?
AS3999 announces 443.9K IPv4 addresses distributed across 11 routed CIDR prefixes. The network is registered in United States.
Who operates AS3999?
AS3999 is operated by The Pennsylvania State University. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS3999 registered in?
AS3999 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
