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 →
AS3603 — global IP footprint
Cities where AS3603 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 |
|---|---|---|---|---|---|---|
| 157.253.0.0/16 | 65.5K |
4.3%
|
University de Los Andes | CO | Bogota D.C. | Bogotá |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS3603 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 |
|---|---|---|
| 157.253.99.0/24 | 192,069 | 2026-07-19 07:45:59 |
| 157.253.0.0/16 | 9,200 | 2026-07-19 07:45:30 |
Frequently Asked Questions
What is AS3603?
AS3603 is an Autonomous System Number assigned to University de Los Andes. 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 AS3603 announce?
AS3603 announces 65.5K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Colombia.
Who operates AS3603?
AS3603 is operated by University de Los Andes. The organization is based in Colombia. You can view all IP ranges and related ASNs on the organization page.
What country is AS3603 registered in?
AS3603 is registered in Colombia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
