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
204.100.137.41	AS18558 Riverside County Office of Education	`2.12ms` from Los Angeles, US
204.100.114.65	AS18558 Riverside County Office of Education	`8.12ms` from Los Angeles, US
204.100.157.9	AS18558 Riverside County Office of Education	`2.52ms` from Los Angeles, US
204.100.149.1	AS18558 Riverside County Office of Education	`9.28ms` from Los Angeles, US
204.100.242.1	AS18558 Riverside County Office of Education	`9.04ms` from Los Angeles, US
204.100.158.65	AS18558 Riverside County Office of Education	`1.98ms` from Los Angeles, US
204.100.180.1	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.121.39	AS18558 Riverside County Office of Education	`4.47ms` from Los Angeles, US
204.100.119.65	AS18558 Riverside County Office of Education	`1.96ms` from Los Angeles, US
204.100.169.57	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.155.133	AS18558 Riverside County Office of Education	`2.35ms` from Los Angeles, US
204.100.204.65	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.171.0	AS18558 Riverside County Office of Education	`3.95ms` from Los Angeles, US
204.100.209.65	AS18558 Riverside County Office of Education	`1.95ms` from Los Angeles, US
204.100.214.65	AS18558 Riverside County Office of Education	`2.00ms` from Los Angeles, US
204.100.244.233	AS18558 Riverside County Office of Education	`2.00ms` from Los Angeles, US
204.100.225.1	AS18558 Riverside County Office of Education	`9.27ms` from Los Angeles, US
204.100.150.1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.136.2	AS18558 Riverside County Office of Education	`2.51ms` from Los Angeles, US
204.100.226.1	AS18558 Riverside County Office of Education	`1.94ms` from Los Angeles, US
204.100.229.65	AS18558 Riverside County Office of Education	`2.01ms` from Los Angeles, US
204.100.164.1	AS18558 Riverside County Office of Education	`1.91ms` from Los Angeles, US
204.100.37.129	AS18558 Riverside County Office of Education	`8.17ms` from Los Angeles, US
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	`4.90ms` 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
71.65.142.30	AS11426 Charter Communications Inc	`13.48ms` from Ashburn, US
71.219.14.254	AS19901 Brightspeed	`7.03ms` from Ashburn, US
50.241.13.254	AS7922 Comcast Cable Communications, LLC	`4.27ms` from Atlanta, US
75.150.66.62	AS7922 Comcast Cable Communications, LLC	`8.11ms` from Boston, US
79.122.90.62	AS5483 Magyar Telekom Plc.	`4.68ms` from Budapest, HU
73.22.117.46	AS7922 Comcast Cable Communications, LLC	`10.14ms` from Chicago, US
192.12.104.30	AS22945 Parkland Health & Hospital System	`2.27ms` from Dallas, US
104.37.247.30	AS46844 Sharktech	`0.59ms` from Denver, US
92.219.204.78	AS3209 Vodafone GmbH	`4.50ms` from Duesseldorf, DE
93.131.243.46	AS6805 Telefonica Germany GmbH & Co.OHG	`3.65ms` from Duesseldorf, DE
35.217.57.94	AS15169 Google LLC	`0.14ms` from Hamina, FI
101.68.51.238	AS4837 CHINA UNICOM China169 Backbone	`5.41ms` from Hangzhou, CN
109.145.114.110	AS2856 British Telecommunications PLC	`9.02ms` from London, GB
97.228.103.30	AS6167 Verizon Business	`16.30ms` from Los Angeles, US
99.24.239.126	AS7018 AT&T Enterprises, LLC	`2.98ms` from Los Angeles, US
82.219.56.126	AS30740 Exa Networks Limited	`1.78ms` from Manchester, GB
23.24.37.254	AS7922 Comcast Cable Communications, LLC	`6.85ms` from Morris Plains, US
60.182.148.158	AS4134 CHINANET BACKBONE	`8.29ms` from Nanchang, CN
94.131.97.206	AS209847 WorkTitans B.V.	`0.18ms` from Prague, CZ
4.155.6.78	AS8075 Microsoft Corporation	`0.30ms` from Quincy, US
37.76.198.142	AS51407 Mada Al-Arab General Services Company	`1.42ms` from Ramallah, PS
148.178.215.142	AS54801 Zillion Network Inc.	`1.43ms` from San Jose, US
200.176.3.254	AS11706 TELEFÔNICA BRASIL S.A	`6.17ms` from Sao Paulo, BR
211.57.196.254	AS4766 Korea Telecom	`6.24ms` from Seoul, KR
175.234.118.126	AS4766 Korea Telecom	`1.79ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 -f2 -m6 204.100.100.214

traceroute to 204.100.100.214 (204.100.100.214): 6 hops max, 52 byte packets

2 [AS6718] 128.0.34.101 0.232 ms

3 [AS6939] 184.104.177.113 3.814 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Bucharest, RO

On April 24th 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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