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 →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 204.239.130.0/23 | 512 |
0.8%
|
Uniserve On Line | CA | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS13937 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 |
|---|---|---|
| 204.239.130.0/24 | 5,222 | 2026-07-25 03:46:27 |
| 204.239.131.0/24 | 5,212 | 2026-07-25 03:46:27 |
Frequently Asked Questions
What is AS13937?
AS13937 is an Autonomous System Number assigned to Uniserve On Line. 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 AS13937 announce?
AS13937 announces 512 IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Canada.
Who operates AS13937?
AS13937 is operated by Uniserve On Line. The organization is based in Canada. You can view all IP ranges and related ASNs on the organization page.
What country is AS13937 registered in?
AS13937 is registered in Canada. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
