Organization
County of Riverside
RCOEK-12NET
Location
Los Angeles
California, United States (US)
Hostname
—
Geolocation
United States (US) United States
- Country
- United States (US)
- Region
- California
- City
- Los Angeles
- Continent
- North America
- Coordinates
- 34.0549, -118.243 View on map ↗
Network Information
IP Range 204.100.0.0 – 204.100.255.255 CIDR 204.100.0.0/16 Network Name RCOEK-12NET Handle NET-204-100-0-0-1 Type DIRECT ALLOCATION Parent Network NET-204-0-0-0-0 Organization County of Riverside Organization ID COUNTY-20 Address Information Technology Services, 3939 Thirteenth Street, Riverside, CA, 92502, United States Country United States (US) Registry ARIN Registered On Jul 13, 1994 Last Updated Oct 20, 2025 Status
active
ASN & Routing
Origin AS AS18558 AS Name NETBLK-RCOEK - Riverside County Office of Education, US Announced Prefix 204.100.78.0/24 AS Registry ARIN Prefix Country United States (US) Allocated 1994-07-13 RPKI Origin Not found (no ROA covers this prefix)
Reverse DNS
No PTR record is published for this address.
Abuse Contact
Raw RDAP Response
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "204.100.0.0",
"length": 16
}
],
"endAddress": "204.100.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-09-12T19:06:10-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-09-12T19:06:10-04:00"
}
],
"handle": "ELLIS608-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ELLIS608-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
},
{
"href": "https://whois.arin.net/rest/poc/ELLIS608-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-09-04T13:48:55-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-01-08T12:23:47-05:00"
}
],
"handle": "WILKI325-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/WILKI325-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
},
{
"href": "https://whois.arin.net/rest/poc/WILKI325-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"routing",
"technical",
"abuse",
"administrative",
"dns",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "3939 Thirteenth Street\nRiverside\nCA\n92502\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"David Wilkinson"
],
[
"n",
{},
"text",
[
"Wilkinson",
"David",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-951-826-6560"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-20T19:35:37-04:00"
},
{
"eventAction": "registration",
"eventDate": "1994-07-13T00:00:00-04:00"
}
],
"handle": "COUNTY-20",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/COUNTY-20",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
},
{
"href": "https://whois.arin.net/rest/org/COUNTY-20",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"County of Riverside"
],
[
"adr",
{
"label": "Information Technology Services\r\n3939 Thirteenth Street\nRiverside\nCA\n92502\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-09-12T19:06:10-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-09-12T19:06:10-04:00"
}
],
"handle": "ELLIS608-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ELLIS608-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
},
{
"href": "https://whois.arin.net/rest/poc/ELLIS608-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-09-04T13:48:55-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-01-08T12:23:47-05:00"
}
],
"handle": "WILKI325-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/WILKI325-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
},
{
"href": "https://whois.arin.net/rest/poc/WILKI325-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse",
"noc",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "3939 Thirteenth Street\nRiverside\nCA\n92502\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"David Wilkinson"
],
[
"n",
{},
"text",
[
"Wilkinson",
"David",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-951-826-6560"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-20T19:37:11-04:00"
},
{
"eventAction": "registration",
"eventDate": "1994-07-13T00:00:00-04:00"
}
],
"handle": "NET-204-100-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/204.100.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
},
{
"href": "https://whois.arin.net/rest/net/NET-204-100-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"name": "RCOEK-12NET",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/ip/204.100.78.0"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-204-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "204.100.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
} Contact details of private individuals are redacted.