Whois & RDAP Lookup

V.PS Cloud KVM VPS for developers KVM VPS · 11 PoPs · 99.9% SLA Simple VPS, premium network · Pick a PoP, deploy in seconds 11 PoPs · APAC, Europe, North America Tier 1 upstreams Premium network · Low-latency routes Free 24×7 support 6.95/mo Deploy a serverDeploy

51.6.0.0/15

RDAP
IP Range51.6.0.0 - 51.7.255.255
Handle51.6.0.0 - 51.7.255.255
NameUK-FORCE9
TypeLEGACY
CountryGB
HolderBTNET-INFRA-MNT
Registered2015-06-17 07:29 UTC
Updated2025-05-12 17:34 UTC
RegistrantBTNET-INFRA-MNT
Admin ContactPlusNet Ripe Admin
AddressPlusnet plc., The Balance, 2 Pinfold Street, Sheffield, S1 2GU, GB
Tech ContactPlusnet Hostmaster
AddressPlusNet Plc, The Balance, 2 Pinfold Street, Sheffield, S1 2GU, UK
Abuse Contact[email protected]
Statusactive
Registry RDAPhttps://rdap.db.ripe.net
RIVEN CLOUD Asia-Pacific cloud servers APAC cloud servers China-optimized routes · Direct to Tokyo & Singapore China Telecom CN2 GIA · CTGNet China Unicom AS9929 · AS10099 China Mobile CMIN2 · AS58807 AMD Ryzen 9950X · Daily backup $49/mo Get started

Raw WHOIS response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '51.6.0.0 - 51.7.255.255'

% Abuse contact for '51.6.0.0 - 51.7.255.255' is '[email protected]'

inetnum:        51.6.0.0 - 51.7.255.255
netname:        UK-FORCE9
country:        GB
descr:          PlusNet plc.
org:            ORG-BPIS1-RIPE
country:        GB
admin-c:        PLUS1-RIPE
tech-c:         PNET2-RIPE
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         MAINT-AS6871
mnt-by:         BTNET-INFRA-MNT
created:        2015-06-17T07:29:25Z
last-modified:  2025-05-12T17:34:43Z
source:         RIPE
remarks:        Please send abuse notification to [email protected]

organisation:   ORG-BPIS1-RIPE
org-name:       British Telecommunications Limited
country:        GB
reg-nr:         01800000
org-type:       LIR
address:        PP1, Floor1, Orion, Adastral Park, Martlesham Heath
address:        IP5 3RE
address:        Ipswich
address:        UNITED KINGDOM
phone:          +44 (0)20 7356 5000
abuse-c:        AR13878-RIPE
mnt-ref:        BTNET-MNT
mnt-ref:        BTNET-INFRA-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         BTNET-INFRA-MNT
admin-c:        FLS15-RIPE
admin-c:        MS35380-RIPE
admin-c:        GF1231-RIPE
created:        2004-04-17T12:11:50Z
last-modified:  2026-06-29T12:02:58Z
source:         RIPE # Filtered

role:           Plusnet Hostmaster
address:        PlusNet Plc
address:        The Balance
address:        2 Pinfold Street
address:        Sheffield
address:        S1 2GU
address:        UK
phone:          +44 114 2200084
abuse-mailbox:  [email protected]
remarks:        ------------------------------------------------
remarks:        Please do NOT e-mail abuse to the contacts given
remarks:        here, e-mail them to [email protected] instead.
remarks:        All email sent to other listed addresses will
remarks:        be deleted!
remarks:        ------------------------------------------------
remarks:        Network Status and Information Page:
remarks:        http://status.plus.net
remarks:        http://support.plus.net
remarks:        ------------------------------------------------
remarks:        Support 24*7 Phone: (UK) 0845 140 0200
remarks:        ------------------------------------------------
admin-c:        JW7886-RIPE
tech-c:         DS3916-RIPE
nic-hdl:        PNET2-RIPE
mnt-by:         MAINT-AS6871
created:        2002-05-16T12:18:00Z
last-modified:  2018-01-17T15:40:44Z
source:         RIPE # Filtered

person:         PlusNet Ripe Admin
address:        Plusnet plc.
address:        The Balance
address:        2 Pinfold Street
address:        Sheffield
address:        S1 2GU
address:        GB
phone:          +44 114 22 00084
nic-hdl:        PLUS1-RIPE
mnt-by:         MAINT-AS6871
created:        1970-01-01T00:00:00Z
last-modified:  2012-05-02T13:03:37Z
source:         RIPE # Filtered

% Information related to '51.6.0.0/15AS6871'

route:          51.6.0.0/15
origin:         AS6871
descr:          PlusNet plc.
mnt-by:         MAINT-AS6871
created:        2016-04-11T12:23:56Z
last-modified:  2016-04-11T12:23:56Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.124.1 (DEXTER)

% Query time: 1064 msec
% WHEN: Sun Sep 13 02:58:37 UTC 2026
Raw RDAP JSON (registry) https://rdap.db.ripe.net
{
  "cidr0_cidrs": [
    {
      "length": 15,
      "v4prefix": "51.6.0.0"
    }
  ],
  "country": "GB",
  "endAddress": "51.7.255.255",
  "entities": [
    {
      "handle": "BTNET-INFRA-MNT",
      "links": [
        {
          "href": "https://rdap.db.ripe.net/entity/BTNET-INFRA-MNT",
          "rel": "self",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        },
        {
          "href": "http://www.ripe.net/data-tools/support/documentation/terms",
          "rel": "copyright",
          "value": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "BTNET-INFRA-MNT"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ]
        ]
      ]
    },
    {
      "handle": "MAINT-AS6871",
      "links": [
        {
          "href": "https://rdap.db.ripe.net/entity/MAINT-AS6871",
          "rel": "self",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        },
        {
          "href": "http://www.ripe.net/data-tools/support/documentation/terms",
          "rel": "copyright",
          "value": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "MAINT-AS6871"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ]
        ]
      ]
    },
    {
      "handle": "ORG-BPIS1-RIPE",
      "links": [
        {
          "href": "https://rdap.db.ripe.net/entity/ORG-BPIS1-RIPE",
          "rel": "self",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        },
        {
          "href": "http://www.ripe.net/data-tools/support/documentation/terms",
          "rel": "copyright",
          "value": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "British Telecommunications Limited"
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ],
          [
            "adr",
            {
              "label": "PP1, Floor1, Orion, Adastral Park, Martlesham Heath\nIP5 3RE\nIpswich\nUNITED KINGDOM"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "tel",
            {
              "type": "voice"
            },
            "text",
            "+44 (0)20 7356 5000"
          ]
        ]
      ]
    },
    {
      "handle": "PLUS1-RIPE",
      "links": [
        {
          "href": "https://rdap.db.ripe.net/entity/PLUS1-RIPE",
          "rel": "self",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        },
        {
          "href": "http://www.ripe.net/data-tools/support/documentation/terms",
          "rel": "copyright",
          "value": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "administrative"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "PlusNet Ripe Admin"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ],
          [
            "adr",
            {
              "label": "Plusnet plc.\nThe Balance\n2 Pinfold Street\nSheffield\nS1 2GU\nGB"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "tel",
            {
              "type": "voice"
            },
            "text",
            "+44 114 22 00084"
          ]
        ]
      ]
    },
    {
      "handle": "PNET2-RIPE",
      "links": [
        {
          "href": "https://rdap.db.ripe.net/entity/PNET2-RIPE",
          "rel": "self",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        },
        {
          "href": "http://www.ripe.net/data-tools/support/documentation/terms",
          "rel": "copyright",
          "value": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "technical"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Plusnet Hostmaster"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "adr",
            {
              "label": "PlusNet Plc\nThe Balance\n2 Pinfold Street\nSheffield\nS1 2GU\nUK"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "tel",
            {
              "type": "voice"
            },
            "text",
            "+44 114 2200084"
          ],
          [
            "email",
            {
              "type": "abuse"
            },
            "text",
            "[email protected]"
          ]
        ]
      ]
    },
    {
      "handle": "RIPE-NCC-LEGACY-MNT",
      "links": [
        {
          "href": "https://rdap.db.ripe.net/entity/RIPE-NCC-LEGACY-MNT",
          "rel": "self",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        },
        {
          "href": "http://www.ripe.net/data-tools/support/documentation/terms",
          "rel": "copyright",
          "value": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "RIPE-NCC-LEGACY-MNT"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ],
          [
            "org",
            {},
            "text",
            "ORG-NCC1-RIPE"
          ]
        ]
      ]
    },
    {
      "entities": [
        {
          "handle": "BTNET-MNT",
          "links": [
            {
              "href": "https://rdap.db.ripe.net/entity/BTNET-MNT",
              "rel": "self",
              "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
            },
            {
              "href": "http://www.ripe.net/data-tools/support/documentation/terms",
              "rel": "copyright",
              "value": "http://www.ripe.net/data-tools/support/documentation/terms"
            }
          ],
          "objectClassName": "entity",
          "roles": [
            "registrant"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "fn",
                {},
                "text",
                "BTNET-MNT"
              ],
              [
                "kind",
                {},
                "text",
                "individual"
              ]
            ]
          ]
        }
      ],
      "handle": "AR13878-RIPE",
      "objectClassName": "entity",
      "roles": [
        "abuse"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Abuse-C Role"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "adr",
            {
              "label": "BT Public Internet Service"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "email",
            {
              "type": "abuse"
            },
            "text",
            "[email protected]"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "registration",
      "eventDate": "2015-06-17T07:29:25Z"
    },
    {
      "eventAction": "last changed",
      "eventDate": "2025-05-12T17:34:43Z"
    }
  ],
  "handle": "51.6.0.0 - 51.7.255.255",
  "ipVersion": "v4",
  "links": [
    {
      "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/51.6.0.0%20-%2051.7.255.255",
      "rel": "rdap-up",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/51.6.0.0%20-%2051.7.255.255?status=active",
      "rel": "rdap-up rdap-active",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-down/51.6.0.0%20-%2051.7.255.255",
      "rel": "rdap-down",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/51.6.0.0%20-%2051.7.255.255",
      "rel": "rdap-top",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/51.6.0.0%20-%2051.7.255.255?status=active",
      "rel": "rdap-top rdap-active",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-bottom/51.6.0.0%20-%2051.7.255.255",
      "rel": "rdap-bottom",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "https://rdap.db.ripe.net/ip/51.6.0.0/15",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
    },
    {
      "href": "http://www.ripe.net/data-tools/support/documentation/terms",
      "rel": "copyright",
      "value": "http://www.ripe.net/data-tools/support/documentation/terms"
    }
  ],
  "name": "UK-FORCE9",
  "notices": [
    {
      "description": [
        "This output has been filtered."
      ],
      "title": "Filtered"
    },
    {
      "description": [
        "If you see inaccuracies in the results, please visit:"
      ],
      "links": [
        {
          "href": "https://www.ripe.net/contact-form?topic=ripe_dbm\u0026show_form=true",
          "rel": "inaccuracy-report",
          "type": "text/html",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        }
      ],
      "title": "Whois Inaccuracy Reporting"
    },
    {
      "description": [
        "Objects returned came from source",
        "RIPE"
      ],
      "title": "Source"
    },
    {
      "description": [
        "This is the RIPE Database query service. The objects are in RDAP format."
      ],
      "links": [
        {
          "href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
          "rel": "terms-of-service",
          "type": "application/pdf",
          "value": "https://rdap.db.ripe.net/ip/51.6.0.0/15"
        }
      ],
      "title": "Terms and Conditions"
    }
  ],
  "objectClassName": "ip network",
  "parentHandle": "0.0.0.0 - 255.255.255.255",
  "port43": "whois.ripe.net",
  "rdapConformance": [
    "geofeed1",
    "rirSearch1",
    "ips",
    "cidr0",
    "rdap_level_0",
    "nro_rdap_profile_0",
    "redacted"
  ],
  "redacted": [
    {
      "method": "partialValue",
      "name": {
        "description": "Multiple country attributes found"
      },
      "pathLang": "jsonpath",
      "postPath": "$.country",
      "reason": {
        "description": "There are multiple country attributes GB, GB found, but only the first country GB returned."
      }
    },
    {
      "method": "removal",
      "name": {
        "description": "Personal e-mail information"
      },
      "prePath": "$.entities[?(@.handle=='ORG-BPIS1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "reason": {
        "description": "Personal data"
      }
    },
    {
      "method": "removal",
      "name": {
        "description": "Personal e-mail information"
      },
      "prePath": "$.entities[?(@.handle=='PLUS1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "reason": {
        "description": "Personal data"
      }
    },
    {
      "method": "removal",
      "name": {
        "description": "Personal e-mail information"
      },
      "prePath": "$.entities[?(@.handle=='PNET2-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "reason": {
        "description": "Personal data"
      }
    },
    {
      "method": "removal",
      "name": {
        "description": "Personal e-mail information"
      },
      "prePath": "$.entities[?(@.handle=='AR13878-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "reason": {
        "description": "Personal data"
      }
    }
  ],
  "remarks": [
    {
      "description": [
        "PlusNet plc.",
        "Please send abuse notification to [email protected]"
      ]
    }
  ],
  "startAddress": "51.6.0.0",
  "status": [
    "active"
  ],
  "type": "LEGACY"
}

Frequently asked questions

What is WHOIS?

WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.

What is RDAP, and how does it differ?

RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.

What is the difference between a registrar and a registrant?

The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.

What are nameservers?

Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.

What is DNSSEC?

DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.

Why is the contact information redacted?

Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.