AS393689
National Library of Medicine
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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About United States National Library of Medicine
The United States National Library of Medicine (NLM), operated by the United States federal government, is the world's largest medical library.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 165.112.8.0/22 | 1.0K |
1.1%
|
National Library of Medicine | US | — | — |
| 165.112.6.0/23 | 512 |
0.6%
|
National Library of Medicine | US | — | — |
| 165.112.34.0/23 | 512 |
0.0%
|
National Library of Medicine | US | — | — |
| 165.112.140.0/24 | 256 |
0.4%
|
National Library of Medicine | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS393689 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 |
|---|---|---|
| 165.112.34.0/23 | 3,944 | 2026-07-23 17:51:51 |
| 165.112.140.0/24 | 3,939 | 2026-07-23 17:51:51 |
| 165.112.8.0/22 | 3,935 | 2026-07-23 17:51:51 |
| 165.112.6.0/23 | 3,928 | 2026-07-23 17:51:51 |
Frequently Asked Questions
What is AS393689?
AS393689 is an Autonomous System Number assigned to National Library of Medicine. 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 AS393689 announce?
AS393689 announces 2.3K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in United States.
Who operates AS393689?
AS393689 is operated by National Library of Medicine. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS393689 registered in?
AS393689 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
