Autonomous System details

AS18558

Riverside County Office of Education · rcoe.us

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AS18558 – Riverside County Office of Education

Field	Value
Country	United States
Website	rcoe.us
Hosted domains	28
IPv4 addresses	71,936
IPv6 addresses	79,228,162,514,264,337,593,543,950,336
ASN type	Education
Registry	arin
Allocated	25 years ago on Sep 12, 2000
Updated	3 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 28 domain names hosted across 8 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
204.100.65.93	██████████	20
204.26.34.4	██████████	2
204.100.155.40	██████████	2
204.100.65.241	██████████	1
204.100.155.42	██████████	1
204.100.230.220	██████████	1
204.100.67.3	██████████	1
204.100.220.2	██████████	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

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

IP Address	ASN	Details
204.100.119.65	AS18558 Riverside County Office of Education	`1.92ms` from Los Angeles, US
204.100.243.1	AS18558 Riverside County Office of Education	`5.53ms` from Los Angeles, US
204.100.244.233	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.137.42	AS18558 Riverside County Office of Education	`2.06ms` from Los Angeles, US
204.100.214.65	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.114.65	AS18558 Riverside County Office of Education	`8.14ms` from Los Angeles, US
204.100.226.1	AS18558 Riverside County Office of Education	`1.96ms` from Los Angeles, US
204.100.134.233	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.138.251	AS18558 Riverside County Office of Education	`2.45ms` from Los Angeles, US
204.100.189.65	AS18558 Riverside County Office of Education	`2.02ms` from Los Angeles, US
204.100.155.10	AS18558 Riverside County Office of Education	`2.36ms` from Los Angeles, US
204.100.242.1	AS18558 Riverside County Office of Education	`9.29ms` from Los Angeles, US
204.100.149.1	AS18558 Riverside County Office of Education	`9.26ms` from Los Angeles, US
204.100.223.1	AS18558 Riverside County Office of Education	`9.32ms` from Los Angeles, US
204.100.136.1	AS18558 Riverside County Office of Education	`2.14ms` from Los Angeles, US
204.100.255.9	AS18558 Riverside County Office of Education	`1.82ms` from Los Angeles, US
204.100.254.234	AS18558 Riverside County Office of Education	`1.89ms` from Los Angeles, US
204.100.180.1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.194.1	AS18558 Riverside County Office of Education	`11.81ms` from Los Angeles, US
204.100.158.65	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.184.40	AS18558 Riverside County Office of Education	`2.90ms` from Los Angeles, US
204.100.37.129	AS18558 Riverside County Office of Education	`8.14ms` from Los Angeles, US
204.100.169.57	AS18558 Riverside County Office of Education	`4.40ms` from Los Angeles, US
204.100.225.1	AS18558 Riverside County Office of Education	`9.29ms` from Los Angeles, US
204.100.121.29	AS18558 Riverside County Office of Education	`4.26ms` 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
46.240.187.110	AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.	`5.74ms` from Belgrade, RS
186.126.151.190	AS7303 Telecom Argentina S.A.	`10.42ms` from Buenos Aires, AR
58.153.128.254	AS4760 HKT Limited	`0.69ms` from Hong Kong, HK
85.95.231.142	AS49467 INETMAR INTERNET HIZMETLERI BILISM TEKNOLOJILERI SANAYI VE TICARET LIMITED	`0.26ms` from Izmir, TR
146.120.41.206	AS44321 Khozinskyi Vadym	`6.50ms` from Kyiv, UA
155.212.103.78	AS48031 Ivanov Vitaliy Sergeevich	`0.12ms` from Kyiv, UA
167.216.147.78	AS3561 CenturyLink Communications, LLC	`0.93ms` from London, GB
76.199.111.62	AS7018 AT&T Enterprises, LLC	`4.37ms` from Los Angeles, US
92.172.165.254	AS12479 Orange Espagne SA	`6.58ms` from Madrid, ES
150.244.20.254	AS766 RedIRIS Autonomous System	`2.03ms` from Madrid, ES
27.215.247.254	AS4837 CHINA UNICOM China169 Backbone	`5.32ms` from Qingdao, CN
4.155.84.110	AS8075 Microsoft Corporation	`0.32ms` from Quincy, US
189.240.23.206	AS8151 UNINET	`3.98ms` from Santiago de Queretaro, MX
210.192.79.62	AS17577 LG HelloVision Corp.	`11.24ms` from Seoul, KR
121.131.117.254	AS4766 Korea Telecom	`1.19ms` from Seoul, KR
112.184.123.254	AS4766 Korea Telecom	`5.57ms` from Seoul, KR
121.138.200.254	AS4766 Korea Telecom	`1.27ms` from Seoul, KR
220.90.128.30	AS4766 Korea Telecom	`1.54ms` from Seoul, KR
83.228.28.254	AS8866 Vivacom Bulgaria EAD	`3.65ms` from Sofia, BG
36.235.108.174	AS3462 Data Communication Business Group	`3.25ms` from Taichung, TW
42.228.129.254	AS4837 CHINA UNICOM China169 Backbone	`2.68ms` from Zhengzhou, CN
193.251.141.238	AS5511 Orange S.A.	`0.15ms` from Amsterdam, NL
79.166.76.62	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`1.19ms` from Athens, GR
202.108.129.14	AS4808 China Unicom Beijing Province Network	`3.71ms` from Beijing, CN
183.242.32.126	AS56048 China Mobile Communicaitons Corporation	`4.21ms` from Beijing, CN

Traceroute

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

traceroute -a -n -q1 -f4 -m10 204.100.198.203

traceroute to 204.100.198.203 (204.100.198.203): 10 hops max, 52 byte packets

4 [AS3356] 4.68.62.233 3.399 ms

5 *

6 [AS3356] 4.35.156.66 114.09 ms

7 [AS2152] 137.164.11.87 115.467 ms

8 *

9 *

10 *

Measurement taken from

IPinfo ProbeNet in Quito, EC

On January 19th 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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