AS18558
Riverside County Office of Education
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 |
|---|---|---|---|---|---|---|
| 204.100.0.0/16 | 65.5K |
8.3%
|
Riverside County Office of Education | US | California | Rancho Cucamonga |
| 204.26.32.0/20 | 4.1K |
0.0%
|
Riverside County Office of Education | US | California | Riverside |
| 204.26.48.0/21 | 2.0K |
0.0%
|
Riverside County Office of Education | US | — | — |
| 198.188.95.0/24 | 256 |
0.0%
|
Riverside County Office of Education | US | — | — |
| 204.26.56.0/24 | 256 |
0.0%
|
Riverside County Office of Education | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18558 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 |
|---|---|---|
| 204.100.194.0/24 | 87,727 | 2026-09-02 12:42:01 |
| 204.100.193.0/24 | 87,687 | 2026-09-02 12:42:01 |
| 204.100.191.0/24 | 87,680 | 2026-09-02 12:42:01 |
| 204.100.190.0/24 | 87,670 | 2026-09-02 12:42:01 |
| 204.100.192.0/24 | 87,640 | 2026-09-02 12:42:01 |
| 204.100.226.0/24 | 45,870 | 2026-09-02 12:41:43 |
| 204.100.136.0/22 | 39,417 | 2026-09-02 12:41:43 |
| 204.100.243.0/24 | 30,791 | 2026-09-02 12:41:43 |
| 204.100.164.0/24 | 22,521 | 2026-08-14 21:47:48 |
| 204.100.225.0/24 | 22,393 | 2026-09-02 12:42:01 |
| 204.100.0.0/16 | 21,492 | 2026-09-02 12:42:01 |
| 204.100.223.0/24 | 18,096 | 2026-09-02 12:42:01 |
| 204.100.181.0/24 | 15,631 | 2026-09-02 12:41:43 |
| 204.100.183.0/24 | 15,619 | 2026-09-02 12:41:43 |
| 204.100.182.0/24 | 15,612 | 2026-09-02 12:41:43 |
| 204.100.184.0/24 | 15,592 | 2026-09-02 12:41:43 |
| 204.100.180.0/24 | 15,472 | 2026-09-02 12:41:43 |
| 204.100.171.0/24 | 14,449 | 2026-09-02 12:41:43 |
| 204.100.170.0/24 | 14,344 | 2026-09-02 12:41:43 |
| 204.100.172.0/24 | 14,342 | 2026-09-02 12:41:43 |
| 204.100.173.0/24 | 14,331 | 2026-09-02 12:41:43 |
| 204.100.174.0/24 | 14,322 | 2026-09-02 12:41:43 |
| 204.100.242.0/24 | 13,357 | 2026-09-02 12:41:43 |
| 204.100.75.0/24 | 12,640 | 2026-09-02 12:41:43 |
| 204.100.41.0/24 | 12,589 | 2026-09-02 12:41:43 |
| 204.100.77.0/24 | 12,541 | 2026-09-02 12:41:43 |
| 204.100.76.0/24 | 12,540 | 2026-09-02 12:41:43 |
| 204.100.60.0/24 | 12,536 | 2026-09-02 12:41:43 |
| 204.100.68.0/22 | 12,533 | 2026-09-02 12:41:43 |
| 204.100.40.0/24 | 12,526 | 2026-09-02 12:41:43 |
| 204.100.65.0/24 | 12,524 | 2026-09-02 12:41:43 |
| 204.100.80.0/24 | 12,522 | 2026-09-02 12:41:43 |
| 204.100.97.0/24 | 12,498 | 2026-09-02 12:41:43 |
| 204.100.67.0/24 | 12,497 | 2026-09-02 12:41:43 |
| 204.100.87.0/24 | 12,486 | 2026-09-02 12:41:43 |
| 204.100.43.0/24 | 12,479 | 2026-09-02 12:41:43 |
| 204.100.66.0/24 | 12,473 | 2026-09-02 12:41:43 |
| 204.100.56.0/24 | 12,472 | 2026-09-02 12:41:43 |
| 204.100.8.0/21 | 12,470 | 2026-09-02 12:41:43 |
| 204.100.73.0/24 | 12,469 | 2026-09-02 12:41:43 |
| 204.100.74.0/24 | 12,458 | 2026-09-02 12:41:43 |
| 204.100.78.0/24 | 12,457 | 2026-09-02 12:41:43 |
| 204.100.92.0/24 | 12,456 | 2026-09-02 12:41:43 |
| 204.100.93.0/24 | 12,455 | 2026-09-02 12:41:43 |
| 204.100.98.0/24 | 12,452 | 2026-09-02 12:41:43 |
| 204.100.58.0/24 | 12,451 | 2026-09-02 12:41:43 |
| 204.100.88.0/24 | 12,448 | 2026-09-02 12:41:43 |
| 204.100.82.0/24 | 12,448 | 2026-09-02 12:41:43 |
| 204.100.61.0/24 | 12,445 | 2026-09-02 12:41:43 |
| 204.100.72.0/24 | 12,443 | 2026-09-02 12:41:43 |
Showing top 50 of 141 announced prefixes by sample volume.
Frequently Asked Questions
What is AS18558?
AS18558 is an Autonomous System Number assigned to Riverside County Office of Education. 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 AS18558 announce?
AS18558 announces 72.2K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in United States.
Who operates AS18558?
AS18558 is operated by Riverside County Office of Education. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS18558 registered in?
AS18558 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
