Autonomous System details

AS18558

Riverside County Office of Education · rcoe.us

United States

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AS18558 – Riverside County Office of Education

Field	Value
Country	United States
Website	rcoe.us
Hosted domains	25
IPv4 addresses	71,936
IPv6 addresses	79,228,162,514,264,338,000,000,000,000
ASN type	Education
Registry	arin
Allocated	26 years ago on Sep 12, 2000
Updated	6 months ago on Oct 20, 2025

Netblock	Company	Num of IPs
204.100.0.0/16	County of Riverside	65,536
204.26.32.0/20	Alvord Unified School District	4,096
204.26.48.0/21	Alvord Unified School District	2,048
204.100.8.0/21	County of Riverside	2,048
204.100.16.0/21	County of Riverside	2,048
204.100.32.0/22	County of Riverside	1,024
204.100.68.0/22	County of Riverside	1,024
204.100.136.0/22	County of Riverside	1,024
204.26.56.0/24	Alvord Unified School District	256
204.100.38.0/24	County of Riverside	256
204.100.40.0/24	County of Riverside	256
204.100.41.0/24	County of Riverside	256
204.100.43.0/24	County of Riverside	256
204.100.44.0/24	County of Riverside	256
204.100.56.0/24	County of Riverside	256
204.100.58.0/24	County of Riverside	256
204.100.59.0/24	County of Riverside	256
204.100.60.0/24	County of Riverside	256
204.100.61.0/24	County of Riverside	256
204.100.65.0/24	County of Riverside	256
204.100.66.0/24	County of Riverside	256
204.100.67.0/24	County of Riverside	256
204.100.72.0/24	County of Riverside	256
204.100.73.0/24	County of Riverside	256
204.100.74.0/24	County of Riverside	256
204.100.75.0/24	County of Riverside	256
204.100.76.0/24	County of Riverside	256
204.100.77.0/24	County of Riverside	256
204.100.78.0/24	County of Riverside	256
204.100.79.0/24	County of Riverside	256
204.100.80.0/24	County of Riverside	256
204.100.81.0/24	County of Riverside	256
204.100.82.0/24	County of Riverside	256
204.100.87.0/24	County of Riverside	256
204.100.88.0/24	County of Riverside	256
204.100.89.0/24	County of Riverside	256
204.100.90.0/24	County of Riverside	256
204.100.91.0/24	County of Riverside	256
204.100.92.0/24	County of Riverside	256
204.100.93.0/24	County of Riverside	256
204.100.94.0/24	County of Riverside	256
204.100.97.0/24	County of Riverside	256
204.100.98.0/24	County of Riverside	256
204.100.99.0/24	County of Riverside	256
204.100.103.0/24	County of Riverside	256
204.100.105.0/24	County of Riverside	256
204.100.106.0/24	County of Riverside	256
204.100.114.0/24	County of Riverside	256
204.100.115.0/24	County of Riverside	256
204.100.116.0/24	County of Riverside	256
204.100.117.0/24	County of Riverside	256
204.100.118.0/24	County of Riverside	256
204.100.119.0/24	County of Riverside	256
204.100.120.0/24	County of Riverside	256
204.100.121.0/24	County of Riverside	256
204.100.122.0/24	County of Riverside	256
204.100.123.0/24	County of Riverside	256
204.100.124.0/24	County of Riverside	256
204.100.125.0/24	County of Riverside	256
204.100.126.0/24	County of Riverside	256
204.100.127.0/24	County of Riverside	256
204.100.128.0/24	County of Riverside	256
204.100.129.0/24	County of Riverside	256
204.100.130.0/24	County of Riverside	256
204.100.131.0/24	County of Riverside	256
204.100.132.0/24	County of Riverside	256
204.100.133.0/24	County of Riverside	256
204.100.134.0/24	County of Riverside	256
204.100.149.0/24	County of Riverside	256
204.100.150.0/24	County of Riverside	256
204.100.151.0/24	County of Riverside	256
204.100.152.0/24	County of Riverside	256
204.100.153.0/24	County of Riverside	256
204.100.154.0/24	County of Riverside	256
204.100.155.0/24	County of Riverside	256
204.100.156.0/24	County of Riverside	256
204.100.157.0/24	County of Riverside	256
204.100.158.0/24	County of Riverside	256
204.100.159.0/24	County of Riverside	256
204.100.164.0/24	County of Riverside	256
204.100.165.0/24	County of Riverside	256
204.100.166.0/24	County of Riverside	256
204.100.167.0/24	County of Riverside	256
204.100.168.0/24	County of Riverside	256
204.100.169.0/24	County of Riverside	256
204.100.170.0/24	County of Riverside	256
204.100.171.0/24	County of Riverside	256
204.100.172.0/24	County of Riverside	256
204.100.173.0/24	County of Riverside	256
204.100.174.0/24	County of Riverside	256
204.100.175.0/24	County of Riverside	256
204.100.180.0/24	County of Riverside	256
204.100.181.0/24	County of Riverside	256
204.100.182.0/24	County of Riverside	256
204.100.183.0/24	County of Riverside	256
204.100.184.0/24	County of Riverside	256
204.100.185.0/24	County of Riverside	256
204.100.186.0/24	County of Riverside	256
204.100.187.0/24	County of Riverside	256
204.100.188.0/24	County of Riverside	256
204.100.189.0/24	County of Riverside	256
204.100.190.0/24	County of Riverside	256
204.100.191.0/24	County of Riverside	256
204.100.192.0/24	County of Riverside	256
204.100.193.0/24	County of Riverside	256
204.100.194.0/24	County of Riverside	256
204.100.200.0/24	County of Riverside	256
204.100.201.0/24	County of Riverside	256
204.100.202.0/24	County of Riverside	256
204.100.203.0/24	County of Riverside	256
204.100.204.0/24	County of Riverside	256
204.100.205.0/24	County of Riverside	256
204.100.206.0/24	County of Riverside	256
204.100.207.0/24	County of Riverside	256
204.100.208.0/24	County of Riverside	256
204.100.209.0/24	County of Riverside	256
204.100.210.0/24	County of Riverside	256
204.100.211.0/24	County of Riverside	256
204.100.212.0/24	County of Riverside	256
204.100.213.0/24	County of Riverside	256
204.100.214.0/24	County of Riverside	256
204.100.220.0/24	County of Riverside	256
204.100.223.0/24	County of Riverside	256
204.100.224.0/24	County of Riverside	256
204.100.225.0/24	County of Riverside	256
204.100.226.0/24	County of Riverside	256
204.100.228.0/24	County of Riverside	256
204.100.229.0/24	County of Riverside	256
204.100.230.0/24	County of Riverside	256
204.100.231.0/24	County of Riverside	256
204.100.232.0/24	County of Riverside	256
204.100.233.0/24	County of Riverside	256
204.100.234.0/24	County of Riverside	256
204.100.235.0/24	County of Riverside	256
204.100.236.0/24	County of Riverside	256
204.100.237.0/24	County of Riverside	256
204.100.238.0/24	County of Riverside	256
204.100.239.0/24	County of Riverside	256
204.100.242.0/24	County of Riverside	256
204.100.243.0/24	County of Riverside	256

Netblock	Company
2607:f708::/32	Riverside County Office of Education

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WHOIS Details

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                                                ASHandle:       AS18558
                                                OrgID:          AS18558
                                                ASName:         AS18558
                                                ASNumber:       AS18558
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 25 domain names hosted across 7 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
204.100.65.93	██████████	4
204.100.155.40	██████████	2
204.26.34.4	██████████	2
204.100.155.42	██████████	1
204.100.65.241	██████████	1
204.100.230.220	██████████	1

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Peers

There are 3 peers for this ASN.

Peers	Name
AS2152	CENIC
AS395643	Corona-Norco Unified School District
AS401974	Val Verde Unified School District

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ASN API & Database

Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS2152	CENIC

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ASN API & Database

Downstreams

There are 2 downstreams for this ASN.

Downstreams	Name
AS395643	Corona-Norco Unified School District
AS401974	Val Verde Unified School District

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ASN API & Database

Pingable IPs

39 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
204.100.105.1	AS18558 Riverside County Office of Education	`1.96ms` from Los Angeles, US
204.100.243.1	AS18558 Riverside County Office of Education	`5.48ms` from Los Angeles, US
204.100.134.225	AS18558 Riverside County Office of Education	`1.91ms` from Los Angeles, US
204.100.194.1	AS18558 Riverside County Office of Education	`11.06ms` from Los Angeles, US
204.100.226.1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.244.233	AS18558 Riverside County Office of Education	`2.03ms` from Los Angeles, US
204.100.37.129	AS18558 Riverside County Office of Education	`8.06ms` from Los Angeles, US
204.100.233.65	AS18558 Riverside County Office of Education	`2.00ms` from Los Angeles, US
204.100.225.1	AS18558 Riverside County Office of Education	`9.24ms` from Los Angeles, US
204.100.119.65	AS18558 Riverside County Office of Education	`1.95ms` from Los Angeles, US
204.100.136.2	AS18558 Riverside County Office of Education	`2.66ms` from Los Angeles, US
204.100.254.225	AS18558 Riverside County Office of Education	`1.95ms` from Los Angeles, US
204.100.164.1	AS18558 Riverside County Office of Education	`1.96ms` from Los Angeles, US
204.100.129.65	AS18558 Riverside County Office of Education	`1.98ms` from Los Angeles, US
204.100.229.65	AS18558 Riverside County Office of Education	`2.01ms` from Los Angeles, US
204.100.157.1	AS18558 Riverside County Office of Education	`2.40ms` from Los Angeles, US
204.100.209.65	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.235.1	AS18558 Riverside County Office of Education	`8.73ms` from Los Angeles, US
204.100.121.28	AS18558 Riverside County Office of Education	`4.34ms` from Los Angeles, US
204.100.150.1	AS18558 Riverside County Office of Education	`1.98ms` from Los Angeles, US
204.100.180.1	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.252.197	AS18558 Riverside County Office of Education	`4.23ms` from Los Angeles, US
204.100.137.40	AS18558 Riverside County Office of Education	`2.08ms` from Los Angeles, US
204.100.125.21	AS18558 Riverside County Office of Education	`6.18ms` from Los Angeles, US
2607:f708::1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
109.50.215.174	AS2860 NOS COMUNICACOES, S.A.	`7.62ms` from Braga, PT
67.198.34.254	AS7459 Grande Communications Networks, LLC	`3.91ms` from Dallas, US
87.178.255.78	AS3320 Deutsche Telekom AG	`8.57ms` from Frankfurt am Main, DE
118.49.217.254	AS4766 Korea Telecom	`1.98ms` from Incheon, KR
91.241.108.78	AS51180 Lanet Network Ltd	`12.09ms` from Kyiv, UA
75.63.72.158	AS7018 AT&T Enterprises, LLC	`2.81ms` from Miami, US
187.63.79.174	AS262664 GIGALINE INTERNET SERVICOS DE INFORMATICA LTDA	`1.36ms` from Rio de Janeiro, BR
96.64.201.62	AS7922 Comcast Cable Communications, LLC	`6.66ms` from San Jose, US
140.130.189.254	AS1659 Taiwan Academic Network (TANet) Information Center	`5.37ms` from Taichung, TW
163.19.27.254	AS1659 Taiwan Academic Network (TANet) Information Center	`2.88ms` from Taipei, TW
182.235.172.254	AS9416 Hoshin Multimedia Center Inc.	`0.76ms` from Taipei, TW
96.113.79.30	AS7922 Comcast Cable Communications, LLC	`0.60ms` from Atlanta, US
117.15.161.30	AS4837 CHINA UNICOM China169 Backbone	`5.20ms` from Beijing, CN
202.5.51.190	AS45326 Broad Band Telecom Services Ltd	`4.55ms` from Dhaka, BD
103.178.194.238	AS141921 PT Jaringan Keluarga Bersama	`0.28ms` from Jakarta, ID
222.133.235.158	AS4837 CHINA UNICOM China169 Backbone	`5.93ms` from Jinan, CN
175.140.119.254	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`2.14ms` from Kuala Lumpur, MY
90.164.160.254	AS12479 Orange Espagne SA	`4.36ms` from Madrid, ES
92.124.149.78	AS12389 PJSC Rostelecom	`8.07ms` from Novosibirsk, RU
119.231.121.62	AS17511 OPTAGE Inc.	`1.64ms` from Osaka, JP
104.214.91.94	AS8075 Microsoft Corporation	`0.26ms` from San Antonio, US
194.81.39.254	AS786 Jisc Services Limited	`13.77ms` from Sheffield, GB
219.70.80.254	AS9416 Hoshin Multimedia Center Inc.	`1.63ms` from Taipei, TW
61.63.193.206	AS9676 SaveCom Internation Inc.	`3.48ms` from Taipei, TW
175.168.22.78	AS4837 CHINA UNICOM China169 Backbone	`9.94ms` from Tieling, CN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -f8 -m16 204.100.118.47

traceroute to 204.100.118.47 (204.100.118.47): 16 hops max, 52 byte packets

8 [AS3356] 4.35.156.66 31.745 ms

9 [AS2152] 137.164.11.87 31.401 ms

10 [AS2152] 137.164.1.111 30.827 ms

11 [AS18558] 204.100.119.66 31.461 ms

12 [AS18558] 204.100.119.65 32.564 ms

13 [AS18558] 204.100.119.66 31.43 ms

14 *

15 *

16 *

Measurement taken from

IPinfo ProbeNet in Dallas, US

On April 13th 2026

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS18558 at robtex.

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