Whois & RDAP Lookup

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to '2400:4000::/22'

% No abuse contact registered for 2400:4000::/22

inet6num:       2400:4000::/22
netname:        OCN-JPNIC-JP-20050815
descr:          Japan Network Information Center
country:        JP
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        JPNIC Allocation Block
remarks:        Authoritative information regarding assignments and
remarks:        allocations made from within this block can also be
remarks:        queried at whois.nic.ad.jp. To obtain an English
remarks:        output query whois -h whois.nic.ad.jp x.x.x.x/e
remarks:        *****************************************************
remarks:        For abuse/any contacts regarding this address range,
remarks:        please refer to the contacts listed on the inet6num
remarks:        object displayed down below, or look up JPNIC Whois.
remarks:        ****************************************************
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
status:         ALLOCATED PORTABLE
last-modified:  2008-09-04T06:49:19Z
source:         APNIC

role:           Japan Network Information Center
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, Japan
country:        JP
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         [email protected]
admin-c:        JI13-AP
tech-c:         JE53-AP
nic-hdl:        JNIC1-AP
mnt-by:         MAINT-JPNIC
last-modified:  2022-01-05T03:04:02Z
source:         APNIC

% Information related to '2400:4000::/22'

inet6num:       2400:4000::/22
netname:        OCN-CIDR-BLK-JP
descr:          NTT DOCOMO BUSINESS,Inc.
remarks:        Email address for spam or abuse complaints:[email protected]
country:        JP
admin-c:        JP00009614
tech-c:         JP00009427
last-modified:  2019-02-20T22:26:42Z
remarks:        This information has been partially mirrored by APNIC from
remarks:        JPNIC. To obtain more specific information, please use the
remarks:        JPNIC WHOIS Gateway at
remarks:        http://www.nic.ad.jp/en/db/whois/en-gateway.html or
remarks:        whois.nic.ad.jp for WHOIS client. (The WHOIS client
remarks:        defaults to Japanese output, use the /e switch for English
remarks:        output)
source:         JPNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-SG1)

% Query time: 438 msec
% WHEN: Fri Aug 07 06:20:57 UTC 2026

% Additional information from whois.nic.ad.jp

Network Information:            
[Network Number]                2400:4000::/22
[Network Name]                  
[Organization]                  NTT DOCOMO BUSINESS,Inc.
[Administrative Contact]        JP00009614
[Technical Contact]             JP00009427
[Abuse]                         [email protected]
[Nameserver]                    ns6-tk01.ocn.ad.jp
[Nameserver]                    ns6-tk02.ocn.ad.jp
[Allocated Date]                2005/08/16
[Last Update]                   2019/02/20 13:26:42(JST)

Raw RDAP JSON (registry) https://rdap.apnic.net

{
  "cidr0_cidrs": [
    {
      "length": 22,
      "v6prefix": "2400:4000::"
    }
  ],
  "country": "JP",
  "endAddress": "2400:43ff:ffff:ffff:ffff:ffff:ffff:ffff",
  "entities": [
    {
      "handle": "JP00009614",
      "links": [
        {
          "href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=JP00009614/e",
          "hreflang": "en",
          "rel": "related",
          "type": "text/html",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        },
        {
          "href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=JP00009614",
          "hreflang": "jp",
          "rel": "related",
          "type": "text/html",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "administrative"
      ]
    },
    {
      "handle": "JP00009427",
      "links": [
        {
          "href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=JP00009427/e",
          "hreflang": "en",
          "rel": "related",
          "type": "text/html",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        },
        {
          "href": "http://whois.nic.ad.jp/cgi-bin/whois_gw?key=JP00009427",
          "hreflang": "jp",
          "rel": "related",
          "type": "text/html",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "technical"
      ]
    },
    {
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2022-01-05T03:04:02Z"
        }
      ],
      "handle": "JNIC1-AP",
      "links": [
        {
          "href": "https://jpnic.rdap.apnic.net/entity/JNIC1-AP",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        }
      ],
      "objectClassName": "entity",
      "roles": [
        "technical",
        "administrative"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Japan Network Information Center"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "adr",
            {
              "label": "Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda\nChiyoda-ku, Tokyo 101-0047, Japan"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "tel",
            {
              "type": "voice"
            },
            "text",
            "+81-3-5297-2311"
          ],
          [
            "tel",
            {
              "type": "fax"
            },
            "text",
            "+81-3-5297-2312"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2019-02-20T22:26:42Z"
    }
  ],
  "handle": "2400:4000::/22",
  "ipVersion": "v6",
  "links": [
    {
      "href": "https://jpnic.rdap.apnic.net/ip/2400:4000::/22",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
    }
  ],
  "name": "OCN-CIDR-BLK-JP",
  "notices": [
    {
      "description": [
        "Objects returned came from source",
        "JPNIC"
      ],
      "title": "Source"
    },
    {
      "description": [
        "This is the APNIC WHOIS Database query service. The objects are in RDAP format.",
        "This information has been partially mirrored by APNIC from JPNIC. To obtain more specific information, please use the JPNIC WHOIS Gateway at http://www.nic.ad.jp/en/db/whois/en-gateway.html or whois.nic.ad.jp for WHOIS client. (The WHOIS client defaults to Japanese output, use the /e switch for English output)"
      ],
      "links": [
        {
          "href": "http://www.apnic.net/db/dbcopyright.html",
          "rel": "terms-of-service",
          "type": "text/html",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        }
      ],
      "title": "Terms and Conditions"
    },
    {
      "description": [
        "If you see inaccuracies in the results, please visit: "
      ],
      "links": [
        {
          "href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
          "rel": "inaccuracy-report",
          "type": "text/html",
          "value": "https://jpnic.rdap.apnic.net/ip/2400:4150::/31"
        }
      ],
      "title": "Whois Inaccuracy Reporting"
    }
  ],
  "objectClassName": "ip network",
  "port43": "whois.apnic.net",
  "rdapConformance": [
    "nro_rdap_profile_0",
    "cidr0",
    "rdap_level_0"
  ],
  "remarks": [
    {
      "description": [
        "NTT DOCOMO BUSINESS,Inc."
      ],
      "title": "description"
    },
    {
      "description": [
        "Email address for spam or abuse complaints : [email protected]"
      ],
      "title": "remarks"
    }
  ],
  "startAddress": "2400:4000::",
  "status": [
    "active"
  ],
  "type": null
}

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.