AS4
University of Southern California
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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About University of Southern California
The University of Southern California is a private research university in Los Angeles, California, United States. Founded in 1880 by Robert M.
⚠ 7 MOAS prefixes — meerdere origin ASNs gedetecteerd
Alle MOAS-anomalieën →Een voorheen stabiele prefix afkomstig van AS4 wordt nu ook aangekondigd door een andere ASN (MOAS — Multiple-Origin AS), gedetecteerd door onze RIPE RIS-collectoren. Vaak goedaardig (anycast, multi-homing of een recente overdracht) — maar het kan duiden op een route leak of prefix hijack, dus het is de moeite waard om te onderzoeken.
| Prefix | Origin ASNs | Laatst gedetecteerd (UTC) |
|---|---|---|
| 43.240.64.0/24 | AS4, AS133296 | 2026-07-25 06:53:55 |
| 165.140.14.0/24 | AS4, AS400215 | 2026-07-25 06:53:55 |
| 170.79.218.0/23 | AS4, AS266306 | 2026-07-25 06:53:55 |
| 165.140.12.0/24 | AS4, AS400215 | 2026-07-25 06:53:55 |
| 165.140.13.0/24 | AS4, AS400215 | 2026-07-25 06:53:55 |
| 196.13.136.0/24 | AS4, AS327753 | 2026-07-24 10:38:47 |
| 103.195.255.0/24 | AS4, AS138283 | 2026-07-24 03:38:44 |
Network profile
Source: PeeringDB →Top CIDR-bereiken
| CIDR | IPs | PTR Density | Organisatie | Land | State | City |
|---|---|---|---|---|---|---|
| 128.9.128.0/17 | 32.8K |
7.2%
|
University of Southern California | US | — | — |
| 128.9.64.0/18 | 16.4K |
3.9%
|
University of Southern California | US | — | — |
| 128.9.32.0/19 | 8.2K |
3.4%
|
University of Southern California | US | Virginia | Vienna |
| 128.9.0.0/20 | 4.1K |
0.0%
|
University of Southern California | US | — | — |
| 128.9.16.0/22 | 1.0K |
12.1%
|
University of Southern California | US | California | Los Angeles |
| 128.9.28.0/22 | 1.0K |
13.5%
|
University of Southern California | US | — | — |
| 45.228.74.0/24 | 256 |
0.0%
|
University of Southern California | AR | — | — |
| 128.9.26.0/24 | 256 |
0.0%
|
University of Southern California | US | — | — |
| 198.32.16.0/24 | 256 |
0.0%
|
University of Southern California | US | — | — |
| 206.117.6.0/24 | 256 |
62.9%
|
University of Southern California | US | — | — |
| 206.117.27.0/24 | 256 |
30.9%
|
University of Southern California | US | — | — |
| 206.117.31.0/24 | 256 |
45.7%
|
University of Southern California | US | — | — |
| 206.117.37.0/24 | 256 |
2.0%
|
University of Southern California | US | — | — |
BGP Aangekondigde Prefixes
Live BGP-anomalieën →Prefixes AS4 daadwerkelijk afkomstig uit BGP, waargenomen door onze RIPE RIS-collectoren. Deze live routingweergave kan afwijken van de bovenstaande registry-toewijzing.
| Prefix | Aankondigingsvoorbeelden | Laatst gezien |
|---|---|---|
| 170.79.218.0/23 | 21,209 | 2026-07-24 23:13:58 |
| 128.9.32.0/20 | 14,659 | 2026-07-25 06:06:06 |
| 128.9.31.0/24 | 9,771 | 2026-07-25 06:06:06 |
| 196.13.137.0/24 | 8,296 | 2026-06-11 11:01:08 |
| 128.9.96.0/20 | 7,476 | 2026-07-25 06:06:06 |
| 206.117.31.0/24 | 6,835 | 2026-07-25 06:06:06 |
| 128.9.48.0/20 | 6,829 | 2026-07-25 06:06:06 |
| 128.9.64.0/20 | 6,771 | 2026-07-25 06:06:06 |
| 128.9.26.0/24 | 6,765 | 2026-07-25 06:06:06 |
| 128.9.176.0/20 | 6,739 | 2026-07-25 06:06:06 |
| 128.9.112.0/20 | 6,739 | 2026-07-25 06:06:06 |
| 128.9.144.0/20 | 6,721 | 2026-07-25 06:06:06 |
| 128.9.0.0/20 | 6,708 | 2026-07-25 06:06:06 |
| 206.117.27.0/24 | 6,688 | 2026-07-25 06:06:06 |
| 198.32.16.0/24 | 6,660 | 2026-07-25 06:06:06 |
| 128.9.128.0/20 | 6,638 | 2026-07-25 06:06:06 |
| 128.9.160.0/20 | 6,618 | 2026-07-25 06:06:06 |
| 206.117.6.0/24 | 6,606 | 2026-07-25 06:06:06 |
| 128.9.80.0/20 | 6,601 | 2026-07-25 06:06:06 |
| 206.117.37.0/24 | 6,561 | 2026-07-25 06:06:06 |
| 128.9.30.0/24 | 4,237 | 2026-07-25 06:06:06 |
| 128.9.28.0/23 | 4,229 | 2026-07-25 06:06:06 |
| 128.9.17.0/24 | 4,227 | 2026-07-25 06:06:06 |
| 128.9.16.0/24 | 4,226 | 2026-07-25 06:06:06 |
| 128.9.18.0/24 | 4,190 | 2026-07-25 06:06:06 |
| 128.9.43.0/24 | 3,991 | 2026-07-25 06:06:06 |
| 128.9.44.0/24 | 3,983 | 2026-07-25 06:06:06 |
| 128.9.40.0/24 | 3,963 | 2026-07-25 06:06:06 |
| 128.9.37.0/24 | 3,958 | 2026-07-25 06:06:06 |
| 128.9.38.0/24 | 3,957 | 2026-07-25 06:06:06 |
| 128.9.35.0/24 | 3,935 | 2026-07-25 06:06:06 |
| 128.9.34.0/24 | 3,924 | 2026-07-25 06:06:06 |
| 128.9.127.0/24 | 3,919 | 2026-07-25 06:06:06 |
| 128.9.36.0/24 | 3,907 | 2026-07-25 06:06:06 |
| 128.9.122.0/24 | 3,904 | 2026-07-25 06:06:06 |
| 128.9.46.0/24 | 3,903 | 2026-07-25 06:06:06 |
| 128.9.47.0/24 | 3,902 | 2026-07-25 06:06:06 |
| 128.9.192.0/18 | 3,899 | 2026-07-25 06:06:06 |
| 128.9.19.0/24 | 3,889 | 2026-07-25 06:06:06 |
| 128.9.113.0/24 | 3,885 | 2026-07-25 06:06:06 |
| 128.9.123.0/24 | 3,885 | 2026-07-25 06:06:06 |
| 128.9.117.0/24 | 3,884 | 2026-07-25 06:06:06 |
| 45.228.74.0/24 | 2,515 | 2026-07-25 06:05:51 |
| 45.228.73.0/24 | 2,457 | 2026-07-25 06:05:51 |
| 45.228.75.0/24 | 2,231 | 2026-07-25 06:05:51 |
| 103.195.255.0/24 | 1,724 | 2026-05-26 02:48:47 |
| 103.199.226.0/23 | 1,124 | 2026-07-17 17:28:05 |
| 165.140.12.0/24 | 842 | 2026-07-24 22:06:52 |
| 165.140.14.0/24 | 842 | 2026-07-24 22:06:52 |
| 165.140.13.0/24 | 556 | 2026-07-24 19:55:57 |
Toon top 50 of 63 aangekondigde prefixes per steekproefvolume.
Frequently Asked Questions
Wat is AS4?
AS4 is een Autonomous System Number toegewezen aan University of Southern California. Een ASN identificeert een netwerk dat een specifieke set IP-adressen beheert en bepaalt hoe verkeer over het internet wordt gerouteerd via BGP (Border Gateway Protocol).
Hoeveel IP-adressen kondigt AS4 aan?
AS4 kondigt 65.3K IPv4-adressen aan, verdeeld over 13 gerouteerde CIDR prefixes. Het netwerk is geregistreerd in United States.
Wie beheert AS4?
AS4 wordt beheerd door University of Southern California. De organisatie is gevestigd in United States. U kunt alle IP-bereiken en gerelateerde ASNs bekijken op de organisatiepagina.
In welk land is AS4 geregistreerd?
AS4 is geregistreerd in United States. Dit geeft aan waar de netwerkoperator is gevestigd, hoewel de IP-adressen die het aankondigt wereldwijd gebruikers kunnen bedienen.
