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AS18862

Omnicare, Inc.

ARIN US active Announced
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Organization
Omnicare, Inc.
NCS-HEALTHCARE
Registered
Oct 18, 2000
26 years ago
IPv4 Prefixes
22
38,656 addresses
IPv6 Prefixes
0
BGP Neighbours
5
5 upstream/peer · 0 downstream

Registration

AS Number AS18862 AS Name NCS-HEALTHCARE Organization Omnicare, Inc. Organization ID OMNIC-31 Address 4936 Blazer Parkway, Dublin, OH, 43017, United States Country United States (US) Registry ARIN Allocated Oct 18, 2000 Record Created Oct 18, 2000 Last Updated Mar 02, 2012 Status
active
WHOIS Server whois.arin.net AS Description NCS-HEALTHCARE - Omnicare, Inc., US Abuse Email [email protected] Abuse Phone +1-860-636-9898

IPv4 Prefixes

22 prefixes · 38,656 addresses · 15 top-level Routing data as of 2026-10-06 16:00 UTC

PrefixRangeAddresses
12.15.144.0/2412.15.144.0 – 12.15.144.255256
74.116.80.0/2274.116.80.0 – 74.116.83.2551,024
74.116.83.0/2474.116.83.0 – 74.116.83.255256
152.145.168.0/24152.145.168.0 – 152.145.168.255256
152.145.172.0/24152.145.172.0 – 152.145.172.255256
152.145.176.0/22152.145.176.0 – 152.145.179.2551,024
152.145.182.0/24152.145.182.0 – 152.145.182.255256
152.145.223.0/24152.145.223.0 – 152.145.223.255256
152.145.224.0/24152.145.224.0 – 152.145.224.255256
152.145.240.0/24152.145.240.0 – 152.145.240.255256
152.145.241.0/24152.145.241.0 – 152.145.241.255256
156.78.128.0/23156.78.128.0 – 156.78.129.255512
156.78.130.0/23156.78.130.0 – 156.78.131.255512
192.160.146.0/24192.160.146.0 – 192.160.146.255256
204.14.128.0/23204.14.128.0 – 204.14.129.255512
204.99.0.0/17204.99.0.0 – 204.99.127.25532,768
204.99.13.0/24204.99.13.0 – 204.99.13.255256
204.99.18.0/24204.99.18.0 – 204.99.18.255256
204.99.19.0/24204.99.19.0 – 204.99.19.255256
204.99.22.0/23204.99.22.0 – 204.99.23.255512
204.99.50.0/24204.99.50.0 – 204.99.50.255256
204.99.118.0/24204.99.118.0 – 204.99.118.255256

IPv6 Prefixes

This AS does not currently announce any IPv6 prefixes.

BGP Neighbours

5 unique neighbours · 5 upstream/peer · 0 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 (5)

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
AS3356LEVEL3 - Level 3 Parent, LLC2774,3860
AS7018ATT-INTERNET4 - AT&T Enterprises, LLC2716990
AS6461ZAYO-6461 - Zayo Bandwidth1451,1720
AS22773ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc.848170
AS701UUNET - Verizon Business111440

Raw RDAP Response

{
  "endAutnum": 18862,
  "entities": [
    {
      "entities": [
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-05-27T13:01:02-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2003-02-27T12:30:10-05:00"
            }
          ],
          "handle": "HOSTM190-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/HOSTM190-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/18862"
            },
            {
              "href": "https://whois.arin.net/rest/poc/HOSTM190-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/18862"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "abuse",
            "technical",
            "administrative"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "151 Farmington Ave.\nHartford\nCT\n06156\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "HostMaster"
              ],
              [
                "org",
                {},
                "text",
                "Aetna Inc."
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-860-636-9898"
              ]
            ]
          ]
        }
      ],
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2020-03-19T15:48:20-04:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2006-04-21T11:58:14-04:00"
        }
      ],
      "handle": "OMNIC-31",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/OMNIC-31",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/18862"
        },
        {
          "href": "https://whois.arin.net/rest/org/OMNIC-31",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/18862"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Omnicare, Inc."
          ],
          [
            "adr",
            {
              "label": "4936 Blazer Parkway\nDublin\nOH\n43017\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2012-03-02T08:03:18-05:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "2000-10-18T00:00:00-04:00"
    }
  ],
  "handle": "AS18862",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/autnum/18862",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/autnum/18862"
    },
    {
      "href": "https://whois.arin.net/rest/asn/AS18862",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/autnum/18862"
    }
  ],
  "name": "NCS-HEALTHCARE",
  "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/18862"
        }
      ],
      "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/18862"
        }
      ],
      "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": 18862,
  "status": [
    "active"
  ]
}

Contact details of private individuals are redacted.