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	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	5 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	██████████	20
204.100.155.40	██████████	2
204.26.34.4	██████████	2
204.100.230.220	██████████	1
204.100.155.42	██████████	1
204.100.220.2	██████████	1
204.100.65.241	██████████	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

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

IP Address	ASN	Details
204.100.150.1	AS18558 Riverside County Office of Education	`1.99ms` from Los Angeles, US
204.100.224.2	AS18558 Riverside County Office of Education	`1.75ms` from Los Angeles, US
204.100.206.116	AS18558 Riverside County Office of Education	`3.40ms` from Los Angeles, US
204.100.233.65	AS18558 Riverside County Office of Education	`1.98ms` from Los Angeles, US
2607:f708::1	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.243.1	AS18558 Riverside County Office of Education	`4.34ms` from Los Angeles, US
204.100.137.38	AS18558 Riverside County Office of Education	`2.07ms` from Los Angeles, US
204.100.114.65	AS18558 Riverside County Office of Education	`8.16ms` from Los Angeles, US
204.100.127.9	AS18558 Riverside County Office of Education	`5.90ms` from Los Angeles, US
204.100.225.1	AS18558 Riverside County Office of Education	`9.30ms` from Los Angeles, US
204.100.236.115	AS18558 Riverside County Office of Education	`5.39ms` from Los Angeles, US
204.100.171.101	AS18558 Riverside County Office of Education	`2.11ms` from Los Angeles, US
204.100.169.57	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.254.229	AS18558 Riverside County Office of Education	`1.88ms` from Los Angeles, US
204.100.255.9	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.194.1	AS18558 Riverside County Office of Education	`11.93ms` from Los Angeles, US
204.100.119.65	AS18558 Riverside County Office of Education	`2.00ms` from Los Angeles, US
204.100.157.1	AS18558 Riverside County Office of Education	`2.49ms` from Los Angeles, US
204.100.226.1	AS18558 Riverside County Office of Education	`1.99ms` from Los Angeles, US
204.100.252.197	AS18558 Riverside County Office of Education	`4.18ms` from Los Angeles, US
204.100.209.65	AS18558 Riverside County Office of Education	`2.00ms` from Los Angeles, US
204.100.37.129	AS18558 Riverside County Office of Education	`8.10ms` from Los Angeles, US
204.26.34.4	AS18558 Riverside County Office of Education	`2.24ms` from Los Angeles, US
204.100.134.237	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.204.65	AS18558 Riverside County Office of Education	`1.97ms` 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
89.132.138.254	AS21334 One Hungary Ltd.	`0.91ms` from Budapest, HU
181.2.239.206	AS7303 Telecom Argentina S.A.	`6.43ms` from Buenos Aires, AR
107.217.137.62	AS7018 AT&T Enterprises, LLC	`11.68ms` from Dallas, US
67.10.77.14	AS11427 Charter Communications Inc	`17.74ms` from Houston, US
203.213.17.190	AS7545 TPG Telecom Limited	`11.07ms` from Melbourne, AU
132.247.190.14	AS278 Universidad Nacional Autonoma de Mexico	`1.06ms` from Mexico City, MX
172.102.10.174	AS36492 Google, LLC	`0.09ms` from Miami, US
73.23.173.174	AS7922 Comcast Cable Communications, LLC	`4.44ms` from Miami, US
79.24.100.30	AS3269 Telecom Italia S.p.A.	`3.45ms` from Milan, IT
187.209.8.94	AS8151 UNINET	`10.55ms` from Monterrey, MX
198.178.17.30	AS7029 Windstream Communications LLC	`15.75ms` from New York City, US
118.105.61.174	AS18126 Chubu Telecommunications Company, Inc.	`10.14ms` from Osaka, JP
3.162.39.94	AS16509 Amazon.com, Inc.	`0.21ms` from Paris, FR
5.29.124.190	AS12849 Hot-Net internet services Ltd.	`0.30ms` from Petaẖ Tiqva, IL
76.153.246.158	AS7922 Comcast Cable Communications, LLC	`10.15ms` from Pompano Beach, US
62.251.240.190	AS6713 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`1.73ms` from Rabat, MA
50.73.170.110	AS7922 Comcast Cable Communications, LLC	`14.43ms` from Reston, US
89.194.48.62	AS8011 MongoDB, Inc.	`0.14ms` from Reston, US
78.36.142.62	AS12389 PJSC Rostelecom	`3.25ms` from Saint Petersburg, RU
129.122.87.30	AS49902 SOCIETE REUNIONNAISE DU RADIOTELEPHONE SCS	`1.75ms` from Saint-Denis, RE
54.153.7.94	AS16509 Amazon.com, Inc.	`0.17ms` from San Jose, US
125.149.240.254	AS4766 Korea Telecom	`1.51ms` from Seoul, KR
211.196.237.254	AS4766 Korea Telecom	`1.37ms` from Seoul, KR
213.67.41.142	AS3301 Telia Company AB	`1.76ms` from Stockholm, SE
140.130.189.254	AS1659 Taiwan Academic Network (TANet) Information Center	`5.06ms` from Taichung, TW

Traceroute

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

traceroute -a -n -q1 -f5 204.100.243.1

traceroute to 204.100.243.1 (204.100.243.1): 64 hops max, 52 byte packets

5 [AS3356] 4.68.111.53 1.434 ms

6 *

7 [AS3356] 4.35.156.66 0.399 ms

8 [AS2152] 137.164.11.87 1.806 ms

9 [AS2152] 137.164.1.111 2.214 ms

10 [AS18558] 204.100.243.1 6.254 ms

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On March 28th 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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