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AS18558

Riverside County Office of Education

ARIN US active Announced
More ASNs in the United States →
Organization
Riverside County Office of Education
NETBLK-RCOEK
Registered
Sep 12, 2000
26 years ago
IPv4 Prefixes
139
71,936 addresses
IPv6 Prefixes
1
65,536 × /48
BGP Neighbours
3
1 upstream/peer · 2 downstream

Registration

AS Number AS18558 AS Name NETBLK-RCOEK Organization Riverside County Office of Education Organization ID RCOE Address 3939 13th Street, Riverside, CA, 92502, United States Country United States (US) Registry ARIN Allocated Sep 12, 2000 Record Created Sep 12, 2000 Last Updated Oct 20, 2025 Status
active
WHOIS Server whois.arin.net AS Description NETBLK-RCOEK - Riverside County Office of Education, US Abuse Email [email protected] Abuse Phone +1-951-826-6560

IPv4 Prefixes

139 prefixes · 71,936 addresses · 4 top-level Routing data as of 2026-10-14 16:00 UTC

204.0.0.0/8 · 139 prefixes · 71,936 addresses
PrefixRangeAddresses
204.26.32.0/20204.26.32.0 – 204.26.47.2554,096
204.26.48.0/21204.26.48.0 – 204.26.55.2552,048
204.26.56.0/24204.26.56.0 – 204.26.56.255256
204.100.0.0/16204.100.0.0 – 204.100.255.25565,536
204.100.8.0/21204.100.8.0 – 204.100.15.2552,048
204.100.16.0/21204.100.16.0 – 204.100.23.2552,048
204.100.32.0/22204.100.32.0 – 204.100.35.2551,024
204.100.38.0/24204.100.38.0 – 204.100.38.255256
204.100.40.0/24204.100.40.0 – 204.100.40.255256
204.100.41.0/24204.100.41.0 – 204.100.41.255256
204.100.43.0/24204.100.43.0 – 204.100.43.255256
204.100.44.0/24204.100.44.0 – 204.100.44.255256
204.100.56.0/24204.100.56.0 – 204.100.56.255256
204.100.58.0/24204.100.58.0 – 204.100.58.255256
204.100.59.0/24204.100.59.0 – 204.100.59.255256
204.100.60.0/24204.100.60.0 – 204.100.60.255256
204.100.61.0/24204.100.61.0 – 204.100.61.255256
204.100.65.0/24204.100.65.0 – 204.100.65.255256
204.100.66.0/24204.100.66.0 – 204.100.66.255256
204.100.67.0/24204.100.67.0 – 204.100.67.255256
204.100.68.0/22204.100.68.0 – 204.100.71.2551,024
204.100.72.0/24204.100.72.0 – 204.100.72.255256
204.100.73.0/24204.100.73.0 – 204.100.73.255256
204.100.74.0/24204.100.74.0 – 204.100.74.255256
204.100.75.0/24204.100.75.0 – 204.100.75.255256
204.100.76.0/24204.100.76.0 – 204.100.76.255256
204.100.77.0/24204.100.77.0 – 204.100.77.255256
204.100.78.0/24204.100.78.0 – 204.100.78.255256
204.100.79.0/24204.100.79.0 – 204.100.79.255256
204.100.80.0/24204.100.80.0 – 204.100.80.255256
204.100.81.0/24204.100.81.0 – 204.100.81.255256
204.100.82.0/24204.100.82.0 – 204.100.82.255256
204.100.87.0/24204.100.87.0 – 204.100.87.255256
204.100.88.0/24204.100.88.0 – 204.100.88.255256
204.100.89.0/24204.100.89.0 – 204.100.89.255256
204.100.90.0/24204.100.90.0 – 204.100.90.255256
204.100.91.0/24204.100.91.0 – 204.100.91.255256
204.100.92.0/24204.100.92.0 – 204.100.92.255256
204.100.93.0/24204.100.93.0 – 204.100.93.255256
204.100.94.0/24204.100.94.0 – 204.100.94.255256
204.100.97.0/24204.100.97.0 – 204.100.97.255256
204.100.98.0/24204.100.98.0 – 204.100.98.255256
204.100.99.0/24204.100.99.0 – 204.100.99.255256
204.100.103.0/24204.100.103.0 – 204.100.103.255256
204.100.105.0/24204.100.105.0 – 204.100.105.255256
204.100.106.0/24204.100.106.0 – 204.100.106.255256
204.100.114.0/24204.100.114.0 – 204.100.114.255256
204.100.115.0/24204.100.115.0 – 204.100.115.255256
204.100.116.0/24204.100.116.0 – 204.100.116.255256
204.100.117.0/24204.100.117.0 – 204.100.117.255256
204.100.118.0/24204.100.118.0 – 204.100.118.255256
204.100.119.0/24204.100.119.0 – 204.100.119.255256
204.100.120.0/24204.100.120.0 – 204.100.120.255256
204.100.121.0/24204.100.121.0 – 204.100.121.255256
204.100.122.0/24204.100.122.0 – 204.100.122.255256
204.100.123.0/24204.100.123.0 – 204.100.123.255256
204.100.124.0/24204.100.124.0 – 204.100.124.255256
204.100.125.0/24204.100.125.0 – 204.100.125.255256
204.100.126.0/24204.100.126.0 – 204.100.126.255256
204.100.127.0/24204.100.127.0 – 204.100.127.255256
204.100.128.0/24204.100.128.0 – 204.100.128.255256
204.100.129.0/24204.100.129.0 – 204.100.129.255256
204.100.130.0/24204.100.130.0 – 204.100.130.255256
204.100.131.0/24204.100.131.0 – 204.100.131.255256
204.100.132.0/24204.100.132.0 – 204.100.132.255256
204.100.133.0/24204.100.133.0 – 204.100.133.255256
204.100.134.0/24204.100.134.0 – 204.100.134.255256
204.100.136.0/22204.100.136.0 – 204.100.139.2551,024
204.100.149.0/24204.100.149.0 – 204.100.149.255256
204.100.150.0/24204.100.150.0 – 204.100.150.255256
204.100.151.0/24204.100.151.0 – 204.100.151.255256
204.100.152.0/24204.100.152.0 – 204.100.152.255256
204.100.153.0/24204.100.153.0 – 204.100.153.255256
204.100.154.0/24204.100.154.0 – 204.100.154.255256
204.100.155.0/24204.100.155.0 – 204.100.155.255256
204.100.156.0/24204.100.156.0 – 204.100.156.255256
204.100.157.0/24204.100.157.0 – 204.100.157.255256
204.100.158.0/24204.100.158.0 – 204.100.158.255256
204.100.159.0/24204.100.159.0 – 204.100.159.255256
204.100.165.0/24204.100.165.0 – 204.100.165.255256
204.100.166.0/24204.100.166.0 – 204.100.166.255256
204.100.167.0/24204.100.167.0 – 204.100.167.255256
204.100.168.0/24204.100.168.0 – 204.100.168.255256
204.100.169.0/24204.100.169.0 – 204.100.169.255256
204.100.170.0/24204.100.170.0 – 204.100.170.255256
204.100.171.0/24204.100.171.0 – 204.100.171.255256
204.100.172.0/24204.100.172.0 – 204.100.172.255256
204.100.173.0/24204.100.173.0 – 204.100.173.255256
204.100.174.0/24204.100.174.0 – 204.100.174.255256
204.100.175.0/24204.100.175.0 – 204.100.175.255256
204.100.180.0/24204.100.180.0 – 204.100.180.255256
204.100.181.0/24204.100.181.0 – 204.100.181.255256
204.100.182.0/24204.100.182.0 – 204.100.182.255256
204.100.183.0/24204.100.183.0 – 204.100.183.255256
204.100.184.0/24204.100.184.0 – 204.100.184.255256
204.100.185.0/24204.100.185.0 – 204.100.185.255256
204.100.186.0/24204.100.186.0 – 204.100.186.255256
204.100.187.0/24204.100.187.0 – 204.100.187.255256
204.100.188.0/24204.100.188.0 – 204.100.188.255256
204.100.189.0/24204.100.189.0 – 204.100.189.255256
204.100.190.0/24204.100.190.0 – 204.100.190.255256
204.100.191.0/24204.100.191.0 – 204.100.191.255256
204.100.192.0/24204.100.192.0 – 204.100.192.255256
204.100.193.0/24204.100.193.0 – 204.100.193.255256
204.100.194.0/24204.100.194.0 – 204.100.194.255256
204.100.200.0/24204.100.200.0 – 204.100.200.255256
204.100.201.0/24204.100.201.0 – 204.100.201.255256
204.100.202.0/24204.100.202.0 – 204.100.202.255256
204.100.203.0/24204.100.203.0 – 204.100.203.255256
204.100.204.0/24204.100.204.0 – 204.100.204.255256
204.100.205.0/24204.100.205.0 – 204.100.205.255256
204.100.206.0/24204.100.206.0 – 204.100.206.255256
204.100.207.0/24204.100.207.0 – 204.100.207.255256
204.100.208.0/24204.100.208.0 – 204.100.208.255256
204.100.209.0/24204.100.209.0 – 204.100.209.255256
204.100.210.0/24204.100.210.0 – 204.100.210.255256
204.100.211.0/24204.100.211.0 – 204.100.211.255256
204.100.212.0/24204.100.212.0 – 204.100.212.255256
204.100.213.0/24204.100.213.0 – 204.100.213.255256
204.100.214.0/24204.100.214.0 – 204.100.214.255256
204.100.220.0/24204.100.220.0 – 204.100.220.255256
204.100.223.0/24204.100.223.0 – 204.100.223.255256
204.100.224.0/24204.100.224.0 – 204.100.224.255256
204.100.225.0/24204.100.225.0 – 204.100.225.255256
204.100.226.0/24204.100.226.0 – 204.100.226.255256
204.100.228.0/24204.100.228.0 – 204.100.228.255256
204.100.229.0/24204.100.229.0 – 204.100.229.255256
204.100.230.0/24204.100.230.0 – 204.100.230.255256
204.100.231.0/24204.100.231.0 – 204.100.231.255256
204.100.232.0/24204.100.232.0 – 204.100.232.255256
204.100.233.0/24204.100.233.0 – 204.100.233.255256
204.100.234.0/24204.100.234.0 – 204.100.234.255256
204.100.235.0/24204.100.235.0 – 204.100.235.255256
204.100.236.0/24204.100.236.0 – 204.100.236.255256
204.100.237.0/24204.100.237.0 – 204.100.237.255256
204.100.238.0/24204.100.238.0 – 204.100.238.255256
204.100.239.0/24204.100.239.0 – 204.100.239.255256
204.100.242.0/24204.100.242.0 – 204.100.242.255256
204.100.243.0/24204.100.243.0 – 204.100.243.255256

IPv6 Prefixes

1 prefix · 65,536 × /48 Routing data as of 2026-10-14 16:00 UTC

PrefixAddresses
2607:f708::/32296

BGP Neighbours

3 unique neighbours · 1 upstream/peer · 2 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries.

Upstream & peer side (1)

Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS2152CENIC-2152 - CENIC1,01652,509350

Downstream side (2)

Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams).

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS401974VVUSD-157-233 - Val Verde Unified School District2603370
AS395643CORONA-NORCOUSD - Corona-Norco Unified School District2565,3280

Raw RDAP Response

{
  "endAutnum": 18558,
  "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/autnum/18558"
            },
            {
              "href": "https://whois.arin.net/rest/poc/ELLIS608-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/18558"
            }
          ],
          "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/autnum/18558"
            },
            {
              "href": "https://whois.arin.net/rest/poc/WILKI325-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/18558"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "dns",
            "noc",
            "abuse",
            "administrative",
            "routing",
            "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": "2025-10-20T19:34:50-04:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2000-09-12T00:00:00-04:00"
        }
      ],
      "handle": "RCOE",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/RCOE",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/18558"
        },
        {
          "href": "https://whois.arin.net/rest/org/RCOE",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/18558"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Riverside County Office of Education"
          ],
          [
            "adr",
            {
              "label": "3939 13th 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/autnum/18558"
        },
        {
          "href": "https://whois.arin.net/rest/poc/ELLIS608-ARIN",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/18558"
        }
      ],
      "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/autnum/18558"
        },
        {
          "href": "https://whois.arin.net/rest/poc/WILKI325-ARIN",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/18558"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "technical",
        "abuse",
        "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": "2025-10-20T19:35:12-04:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "2000-09-12T00:00:00-04:00"
    }
  ],
  "handle": "AS18558",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/autnum/18558",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/autnum/18558"
    },
    {
      "href": "https://whois.arin.net/rest/asn/AS18558",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/autnum/18558"
    }
  ],
  "name": "NETBLK-RCOEK",
  "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/autnum/18558"
        }
      ],
      "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/autnum/18558"
        }
      ],
      "title": "Whois Inaccuracy Reporting"
    },
    {
      "description": [
        "Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
      ],
      "title": "Copyright Notice"
    }
  ],
  "objectClassName": "autnum",
  "port43": "whois.arin.net",
  "rdapConformance": [
    "nro_rdap_profile_0",
    "rdap_level_0",
    "nro_rdap_profile_asn_flat_0"
  ],
  "startAutnum": 18558,
  "status": [
    "active"
  ]
}

Contact details of private individuals are redacted.