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
204.100.67.3	██████████	1
204.100.230.220	██████████	1
204.100.65.241	██████████	1
204.100.155.42	██████████	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
204.100.137.41	AS18558 Riverside County Office of Education	`2.09ms` from Los Angeles, US
204.100.121.28	AS18558 Riverside County Office of Education	`4.37ms` from Los Angeles, US
204.100.214.65	AS18558 Riverside County Office of Education	`1.96ms` from Los Angeles, US
204.100.164.1	AS18558 Riverside County Office of Education	`2.08ms` from Los Angeles, US
204.100.180.1	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.242.1	AS18558 Riverside County Office of Education	`9.33ms` from Los Angeles, US
204.100.254.5	AS18558 Riverside County Office of Education	`1.91ms` from Los Angeles, US
204.100.125.2	AS18558 Riverside County Office of Education	`9.82ms` from Los Angeles, US
204.100.114.65	AS18558 Riverside County Office of Education	`8.10ms` from Los Angeles, US
204.100.209.65	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
2607:f708::1	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.252.197	AS18558 Riverside County Office of Education	`4.17ms` from Los Angeles, US
204.100.158.65	AS18558 Riverside County Office of Education	`2.01ms` from Los Angeles, US
204.100.223.1	AS18558 Riverside County Office of Education	`9.29ms` from Los Angeles, US
204.100.124.65	AS18558 Riverside County Office of Education	`2.02ms` from Los Angeles, US
204.100.236.115	AS18558 Riverside County Office of Education	`5.44ms` from Los Angeles, US
204.100.157.11	AS18558 Riverside County Office of Education	`2.60ms` from Los Angeles, US
204.100.194.1	AS18558 Riverside County Office of Education	`11.74ms` from Los Angeles, US
204.100.105.1	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.129.65	AS18558 Riverside County Office of Education	`1.92ms` from Los Angeles, US
204.100.184.40	AS18558 Riverside County Office of Education	`2.97ms` from Los Angeles, US
204.100.235.202	AS18558 Riverside County Office of Education	`5.60ms` from Los Angeles, US
204.100.189.65	AS18558 Riverside County Office of Education	`1.93ms` from Los Angeles, US
204.100.255.241	AS18558 Riverside County Office of Education	`1.97ms` from Los Angeles, US
204.100.119.65	AS18558 Riverside County Office of Education	`2.00ms` 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
44.219.151.14	AS14618 Amazon.com, Inc.	`0.66ms` from Ashburn, US
44.199.231.254	AS14618 Amazon.com, Inc.	`0.90ms` from Ashburn, US
12.246.39.126	AS7018 AT&T Enterprises, LLC	`2.66ms` from Ashburn, US
79.167.171.206	AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA	`1.68ms` from Athens, GR
85.73.199.126	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`5.37ms` from Athens, GR
157.66.118.62	AS151719 TACT COMMUNICATION PVT LTD	`0.81ms` from Chennai, IN
2.127.4.30	AS5607 Sky UK Limited	`5.29ms` from Erith, GB
77.23.99.254	AS3209 Vodafone GmbH	`5.96ms` from Hamburg, DE
113.172.159.254	AS45899 VNPT Corp	`0.96ms` from Ho Chi Minh City, VN
14.169.163.222	AS45899 VNPT Corp	`1.08ms` from Ho Chi Minh City, VN
149.126.218.30	AS209372 WS Telecom Inc	`0.22ms` from London, GB
156.245.103.174	AS398823 PEG TECH INC	`0.29ms` from Los Angeles, US
68.120.91.254	AS7018 AT&T Enterprises, LLC	`1.82ms` from Los Angeles, US
90.164.160.254	AS12479 Orange Espagne SA	`4.37ms` from Madrid, ES
153.141.249.190	AS4713 NTT DOCOMO BUSINESS,Inc.	`18.47ms` from Osaka, JP
148.60.71.254	AS2200 Renater	`6.80ms` from Paris, FR
200.25.222.126	AS23487 CONECEL	`2.42ms` from Quito, EC
104.164.117.238	AS18779 EGIHosting	`0.13ms` from Santa Clara, US
121.163.50.254	AS4766 Korea Telecom	`2.88ms` from Seoul, KR
175.215.255.238	AS4766 Korea Telecom	`7.55ms` from Seoul, KR
211.109.49.14	AS9318 SK Broadband Co Ltd	`1.76ms` from Seoul, KR
112.85.155.126	AS4837 CHINA UNICOM China169 Backbone	`6.46ms` from Shanghai, CN
194.132.69.238	AS1257 Tele2 Sverige AB	`2.11ms` from Stockholm, SE
211.23.150.254	AS3462 Data Communication Business Group	`1.31ms` from Taipei, TW
203.74.132.254	AS3462 Data Communication Business Group	`0.87ms` from Taipei, 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 -m9 204.100.52.133

traceroute to 204.100.52.133 (204.100.52.133): 9 hops max, 52 byte packets

5 [AS6939] 184.105.81.24 68.074 ms

6 [AS6939] 72.52.92.166 72.02 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Grantham, GB

On December 28th 2025

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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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