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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →AS13371 — global IP footprint
Cities where AS13371 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 |
|---|---|---|---|---|---|---|
| 152.3.0.0/16 | 65.5K |
15.6%
|
Duke University | US | North Carolina | Durham |
| 152.16.0.0/16 | 65.5K |
5.9%
|
Duke University | US | North Carolina | Durham |
| 67.159.64.0/18 | 16.4K |
5.1%
|
Duke University | US | — | — |
| 152.22.224.0/20 | 4.1K |
0.0%
|
Duke University | US | — | — |
| 198.86.29.0/24 | 256 |
0.4%
|
Duke University | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS13371 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 |
|---|---|---|
| 198.86.29.0/24 | 11,298 | 2026-07-23 18:56:56 |
| 152.3.0.0/16 | 9,023 | 2026-07-23 18:56:55 |
| 67.159.64.0/18 | 8,993 | 2026-07-23 18:56:55 |
| 152.22.224.0/20 | 6,317 | 2026-07-23 20:04:52 |
| 152.16.0.0/16 | 4,426 | 2026-07-23 18:56:56 |
Frequently Asked Questions
What is AS13371?
AS13371 is an Autonomous System Number assigned to Duke 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 AS13371 announce?
AS13371 announces 151.8K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in United States.
Who operates AS13371?
AS13371 is operated by Duke University. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS13371 registered in?
AS13371 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
