Dashboard / ASN Lookup / AS19

AS19

Leidos, Inc.

ARIN US active Announced

More ASNs in the United States →

Organization

Leidos, Inc.

LEIDOS-AS

Registered

Jul 27, 1984

42 years ago

IPv4 Prefixes

135,168 addresses

IPv6 Prefixes

4,096 × /48

BGP Neighbours

3 upstream/peer · 0 downstream

Registration

AS Number AS19 AS Name LEIDOS-AS Organization Leidos, Inc. Organization ID LEIDO Address 1750 Presidents Street, Reston, VA, 20190, United States Country United States (US) Registry ARIN Allocated Jul 27, 1984 Record Created Jul 27, 1984 Last Updated Mar 05, 2026 Status

active

WHOIS Server whois.arin.net AS Description LEIDOS-AS - Leidos, Inc., US Abuse Email [email protected] Abuse Phone +1-571-526-6640

IPv4 Prefixes

26 prefixes · 135,168 addresses · 8 top-level Routing data as of 2026-10-03 16:00 UTC

Prefix	Range	Addresses
140.162.0.0/16	140.162.0.0 – 140.162.255.255	65,536
140.162.8.0/23	140.162.8.0 – 140.162.9.255	512
140.162.10.0/23	140.162.10.0 – 140.162.11.255	512
140.162.12.0/23	140.162.12.0 – 140.162.13.255	512
140.162.16.0/23	140.162.16.0 – 140.162.17.255	512
140.162.24.0/21	140.162.24.0 – 140.162.31.255	2,048
140.162.32.0/23	140.162.32.0 – 140.162.33.255	512
140.162.40.0/21	140.162.40.0 – 140.162.47.255	2,048
140.162.48.0/22	140.162.48.0 – 140.162.51.255	1,024
140.162.64.0/18	140.162.64.0 – 140.162.127.255	16,384
140.162.128.0/18	140.162.128.0 – 140.162.191.255	16,384
140.162.190.0/23	140.162.190.0 – 140.162.191.255	512
140.162.191.0/24	140.162.191.0 – 140.162.191.255	256
140.162.192.0/18	140.162.192.0 – 140.162.255.255	16,384
140.162.254.0/23	140.162.254.0 – 140.162.255.255	512
140.162.255.0/24	140.162.255.0 – 140.162.255.255	256
149.8.0.0/16	149.8.0.0 – 149.8.255.255	65,536
149.8.0.0/17	149.8.0.0 – 149.8.127.255	32,768
149.8.46.0/23	149.8.46.0 – 149.8.47.255	512
149.8.128.0/17	149.8.128.0 – 149.8.255.255	32,768
192.5.8.0/24	192.5.8.0 – 192.5.8.255	256
192.33.134.0/24	192.33.134.0 – 192.33.134.255	256
192.131.125.0/24	192.131.125.0 – 192.131.125.255	256
192.132.104.0/24	192.132.104.0 – 192.132.104.255	256
204.115.176.0/21	204.115.176.0 – 204.115.183.255	2,048
205.153.240.0/22	205.153.240.0 – 205.153.243.255	1,024

IPv6 Prefixes

3 prefixes · 4,096 × /48 · 1 top-level Routing data as of 2026-10-03 16:00 UTC

Prefix	Addresses
2620:11c:8000::/36	2⁹²
2620:11c:8000::/40	2⁸⁸
2620:11c:8800::/40	2⁸⁸

BGP Neighbours

3 unique neighbours · 3 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 (3)

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

AS	Name	AS paths	IPv4 sightings	IPv6 sightings
AS62	CONE - CyrusOne LLC	311	2,363	333
AS6461	ZAYO-6461 - Zayo Bandwidth	305	4,643	408
AS3356	LEVEL3 - Level 3 Parent, LLC	179	1,704	266

Raw RDAP Response

{
  "endAutnum": 19,
  "entities": [
    {
      "entities": [
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2025-11-20T09:15:42-05:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2013-10-30T11:52:53-04:00"
            }
          ],
          "handle": "MAJ32-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/MAJ32-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/19"
            },
            {
              "href": "https://whois.arin.net/rest/poc/MAJ32-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/19"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "technical",
            "administrative"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "fn",
                {},
                "text",
                "REDACTED"
              ],
              [
                "kind",
                {},
                "text",
                "individual"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-04-27T09:20:19-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2014-11-18T11:52:06-05:00"
            }
          ],
          "handle": "LEIDO-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/LEIDO-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/19"
            },
            {
              "href": "https://whois.arin.net/rest/poc/LEIDO-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/19"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "abuse"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "1750 Presidents Street\nReston\nVA\n20190\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Leidos NOC"
              ],
              [
                "org",
                {},
                "text",
                "Leidos"
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-571-526-6640"
              ]
            ]
          ]
        }
      ],
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2026-02-12T17:36:29-05:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2013-10-31T17:07:56-04:00"
        }
      ],
      "handle": "LEIDO",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/LEIDO",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/19"
        },
        {
          "href": "https://whois.arin.net/rest/org/LEIDO",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/19"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Leidos, Inc."
          ],
          [
            "adr",
            {
              "label": "1750 Presidents Street\nReston\nVA\n20190\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ]
        ]
      ]
    },
    {
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2026-03-05T08:55:43-05:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2026-03-05T08:55:43-05:00"
        }
      ],
      "handle": "LNE68-ARIN",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/LNE68-ARIN",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/19"
        },
        {
          "href": "https://whois.arin.net/rest/poc/LNE68-ARIN",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/19"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "technical"
      ],
      "status": [
        "validated"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "adr",
            {
              "label": "1750 Presidents Street\nReston\nVA\n20190\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "fn",
            {},
            "text",
            "Leidos Network Engineering"
          ],
          [
            "org",
            {},
            "text",
            "Leidos, Inc."
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ],
          [
            "tel",
            {
              "type": [
                "work",
                "voice"
              ]
            },
            "text",
            "+1-855-953-4367"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2026-03-05T08:58:05-05:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "1984-07-27T00:00:00-04:00"
    }
  ],
  "handle": "AS19",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/autnum/19",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/autnum/19"
    },
    {
      "href": "https://whois.arin.net/rest/asn/AS19",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/autnum/19"
    }
  ],
  "name": "LEIDOS-AS",
  "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/19"
        }
      ],
      "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/19"
        }
      ],
      "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": 19,
  "status": [
    "active"
  ]
}

Contact details of private individuals are redacted.