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 →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 130.239.0.0/17 | 32.8K |
33.5%
|
Umea University | SE | Västerbotten County | Umeå |
| 130.239.128.0/18 | 16.4K |
47.0%
|
Umea University | SE | Västerbotten County | Umeå |
| 130.239.224.0/19 | 8.2K |
54.2%
|
Umea University | SE | Västerbotten County | Umeå |
| 130.239.208.0/20 | 4.1K |
99.1%
|
Umea University | SE | Västerbotten County | Umeå |
| 130.239.200.0/21 | 2.0K |
25.3%
|
Umea University | SE | — | — |
| 130.239.192.0/22 | 1.0K |
91.0%
|
Umea University | SE | — | — |
| 130.239.196.0/23 | 512 |
22.5%
|
Umea University | SE | — | — |
| 192.36.112.0/23 | 512 |
0.0%
|
Umea University | SE | — | — |
| 130.239.199.0/24 | 256 |
8.6%
|
Umea University | SE | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS2833 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 |
|---|---|---|
| 192.36.112.0/23 | 11,905 | 2026-07-23 15:21:40 |
| 130.239.0.0/16 | 11,882 | 2026-07-23 15:21:38 |
Frequently Asked Questions
What is AS2833?
AS2833 is an Autonomous System Number assigned to Umea 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 AS2833 announce?
AS2833 announces 65.8K IPv4 addresses distributed across 9 routed CIDR prefixes. The network is registered in Sweden.
Who operates AS2833?
AS2833 is operated by Umea University. The organization is based in Sweden. You can view all IP ranges and related ASNs on the organization page.
What country is AS2833 registered in?
AS2833 is registered in Sweden. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
