AS20
University of Rochester
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
- Multiple-origin (MOAS) routing anomaly −12
- Academic allocation +6
- Trust score 59 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About University of Rochester
The University of Rochester is a private research university in Rochester, New York, United States. It was founded in 1850 and moved into its current campus, next to the Genesee River, in 1930.
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS20 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 93.180.220.0/24 | AS20, AS203217 | 2026-07-22 23:23:24 |
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.151.0.0/16 | 65.5K |
21.9%
|
University of Rochester | US | New York | Rochester |
| 192.5.53.0/24 | 256 |
45.3%
|
University of Rochester | US | — | — |
| 199.89.214.0/24 | 256 |
3.9%
|
University of Rochester | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS20 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 |
|---|---|---|
| 45.160.254.0/24 | 4,883 | 2026-07-10 06:03:55 |
| 192.5.53.0/24 | 3,571 | 2026-07-23 14:24:32 |
| 199.89.214.0/24 | 3,495 | 2026-07-23 14:25:31 |
| 128.151.0.0/16 | 3,441 | 2026-07-23 14:19:49 |
| 45.160.252.0/24 | 2,254 | 2026-07-10 06:00:43 |
| 45.160.254.0/23 | 2,025 | 2026-07-10 05:45:15 |
| 45.160.255.0/24 | 414 | 2026-07-10 06:00:43 |
| 45.160.252.0/23 | 92 | 2026-07-10 06:00:43 |
| 45.160.252.0/22 | 38 | 2026-07-10 15:10:43 |
| 45.160.253.0/24 | 23 | 2026-07-10 05:28:10 |
| 93.180.220.0/24 | 3 | 2026-06-06 12:19:53 |
| 103.84.105.0/24 | 2 | 2026-06-26 11:34:46 |
| 103.251.212.0/24 | 2 | 2026-06-26 11:34:46 |
| 103.251.59.0/24 | 2 | 2026-06-26 11:34:46 |
| 103.251.19.0/24 | 2 | 2026-06-26 11:34:46 |
Frequently Asked Questions
What is AS20?
AS20 is an Autonomous System Number assigned to University of Rochester. 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 AS20 announce?
AS20 announces 66.0K IPv4 addresses distributed across 3 routed CIDR prefixes. The network is registered in United States.
Who operates AS20?
AS20 is operated by University of Rochester. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS20 registered in?
AS20 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
