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
204.100.136.2	AS18558 Riverside County Office of Education	`2.66ms` from Los Angeles, US
204.100.37.129	AS18558 Riverside County Office of Education	`8.06ms` from Los Angeles, US
204.100.158.65	AS18558 Riverside County Office of Education	`1.88ms` from Los Angeles, US
204.100.137.40	AS18558 Riverside County Office of Education	`2.08ms` from Los Angeles, US
204.100.169.57	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.204.65	AS18558 Riverside County Office of Education	`2.03ms` from Los Angeles, US
204.100.121.28	AS18558 Riverside County Office of Education	`4.34ms` from Los Angeles, US
204.100.124.65	AS18558 Riverside County Office of Education	`1.90ms` from Los Angeles, US
204.100.129.65	AS18558 Riverside County Office of Education	`1.98ms` from Los Angeles, US
204.100.244.233	AS18558 Riverside County Office of Education	`2.03ms` from Los Angeles, US
204.100.252.197	AS18558 Riverside County Office of Education	`4.23ms` from Los Angeles, US
204.100.229.65	AS18558 Riverside County Office of Education	`2.01ms` from Los Angeles, US
204.100.225.1	AS18558 Riverside County Office of Education	`9.24ms` from Los Angeles, US
204.100.223.1	AS18558 Riverside County Office of Education	`9.26ms` from Los Angeles, US
2607:f708::1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.243.1	AS18558 Riverside County Office of Education	`5.48ms` from Los Angeles, US
204.100.255.241	AS18558 Riverside County Office of Education	`1.95ms` from Los Angeles, US
204.100.134.225	AS18558 Riverside County Office of Education	`1.91ms` from Los Angeles, US
204.100.226.1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.125.21	AS18558 Riverside County Office of Education	`6.18ms` from Los Angeles, US
204.100.189.65	AS18558 Riverside County Office of Education	`1.90ms` from Los Angeles, US
204.100.114.65	AS18558 Riverside County Office of Education	`8.08ms` from Los Angeles, US
204.100.242.1	AS18558 Riverside County Office of Education	`10.53ms` from Los Angeles, US
204.100.235.1	AS18558 Riverside County Office of Education	`8.73ms` from Los Angeles, US
204.100.254.225	AS18558 Riverside County Office of Education	`1.95ms` 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
40.74.40.14	AS8075 Microsoft Corporation	`0.15ms` from Amsterdam, NL
178.2.207.46	AS3209 Vodafone GmbH	`7.86ms` from Berlin, DE
23.245.219.206	AS11776 Breezeline	`13.60ms` from Chicago, US
177.69.36.126	AS16735 ALGAR TELECOM S/A	`0.83ms` from Curitiba, BR
177.207.216.78	AS18881 TELEFÔNICA BRASIL S.A	`5.02ms` from Curitiba, BR
98.7.166.142	AS40294 Charter Communications LLC	`13.70ms` from Dallas, US
65.70.124.254	AS7018 AT&T Enterprises, LLC	`6.50ms` from Dallas, US
168.228.211.46	AS264918 technical solucoes em informatica ltda	`12.04ms` from Fortaleza, BR
87.178.255.78	AS3320 Deutsche Telekom AG	`8.57ms` from Frankfurt am Main, DE
219.77.163.254	AS4760 HKT Limited	`0.66ms` from Hong Kong, HK
49.167.79.238	AS17858 LG POWERCOMM	`2.07ms` from Incheon, KR
175.249.67.142	AS4766 Korea Telecom	`7.20ms` from Incheon, KR
118.45.148.62	AS4766 Korea Telecom	`4.93ms` from Incheon, KR
149.165.155.254	AS10680 Indiana University	`1.98ms` from Indianapolis, US
39.45.226.158	AS17557 Pakistan Telecommunication Company Limited	`8.51ms` from Islamabad, PK
37.52.92.142	AS6849 JSC "Ukrtelecom"	`12.93ms` from Khmelnytskyi, UA
156.254.104.94	AS48031 Ivanov Vitaliy Sergeevich	`0.11ms` from Kyiv, UA
110.73.2.158	AS4837 CHINA UNICOM China169 Backbone	`6.85ms` from Liuzhou, CN
109.158.223.238	AS2856 British Telecommunications PLC	`7.70ms` from London, GB
192.188.9.14	AS393833 Outback Internet	`5.41ms` from Los Angeles, US
18.102.249.254	AS16509 Amazon.com, Inc.	`0.10ms` from Milan, IT
103.225.76.254	AS133974 Pinnacle Tele Services Pvt. Ltd.	`13.77ms` from Mumbai, IN
92.124.149.78	AS12389 PJSC Rostelecom	`8.07ms` from Novosibirsk, RU
121.92.101.254	AS150359 Cable Television TOYAMA Inc.	`6.25ms` from Osaka, JP
115.96.184.158	AS17488 Hathway IP Over Cable Internet	`1.33ms` from Saint Thomas Mount, IN

Traceroute

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

traceroute -a -n -q1 -f5 -m9 204.100.28.122

traceroute to 204.100.28.122 (204.100.28.122): 9 hops max, 52 byte packets

5 [AS3356] 4.35.156.66 8.323 ms

6 [AS2152] 137.164.11.87 9.504 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Fremont, 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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