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WHOIS lookup

Look up a domain, an IPv4 or IPv6 address or an AS number (ASN). For a domain: who registered it, which registrar holds it, when it expires and what its status codes mean. For an address or ASN: which network it belongs to, who holds it and where to report abuse. Asked over RDAP and classic WHOIS, of the registry and then the registrar.

Try github.com, bbc.co.uk, 8.8.8.8, AS13335. AS numbers work as AS13335 or plain 13335; URLs and e-mail addresses are trimmed to their domain.

2a01:111:f403:f90a::4

IP addressHeld by MICROSOFT-MAINT2 requests in 0.1 s2026-11-09 05:24:59 UTCRegistered

Network

Range2a01:110:: – 2a01:111:ffff:ffff:ffff:ffff:ffff:ffff
CIDR2a01:110::/31
NameUK-MICROSOFT-20060601
Held byMICROSOFT-MAINT MICROSOFT-MAINT
CountryGB
DescriptionMicrosoft Corporation AS8075
To report suspected security issues specific to
traffic emanating from Microsoft online services,
including the distribution of malicious content
or other illicit or illegal material through a
Microsoft online service, please submit reports
to:
* https://cert.microsoft.com
For SPAM and other abuse issues, such as Microsoft
Accounts, please contact:
* abuse@microsoft.com
To report security vulnerabilities in Microsoft
products and services, please contact:
* secure@microsoft.com
For legal and law enforcement-related requests,
please contact:
* msndcc@microsoft.com
For routing, peering or DNS issues, please
contact:
* IOC@microsoft.com
Microsoft
TypeALLOCATED-BY-RIR
Announced byAS8075
Handle2a01:110::/31 · part of 2a00::/11
Registered · 20 years, 5 months ago
Last changed · 10 years, 3 months ago
Statusactive
Report abuseabuse@microsoft.com
RegistryRIPE NCC

Reverse DNS and more: DNS lookup for 2a01:111:f403:f90a::4.

WHOIS

The raw replies over port 43, as the whois command shows them.

RIPE NCC whois.ripe.net

% 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 '2a01:110::/31'

% Abuse contact for '2a01:110::/31' is 'abuse@microsoft.com'

inet6num:       2a01:110::/31
netname:        UK-MICROSOFT-20060601
country:        GB
org:            ORG-MA42-RIPE
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         ALLOCATED-BY-RIR
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MICROSOFT-MAINT
mnt-lower:      MICROSOFT-MAINT
mnt-routes:     MICROSOFT-MAINT
created:        2006-06-01T08:53:35Z
last-modified:  2016-07-12T17:06:10Z
source:         RIPE

organisation:   ORG-MA42-RIPE
org-name:       Microsoft Limited
country:        GB
reg-nr:         01624297
org-type:       LIR
descr:          Microsoft Corporation AS8075
descr:          To report suspected security issues specific to
descr:          traffic emanating from Microsoft online services,
descr:          including the distribution of malicious content
descr:          or other illicit or illegal material through a
descr:          Microsoft online service, please submit reports
descr:          to:
descr:          * https://cert.microsoft.com
descr:          For SPAM and other abuse issues, such as Microsoft
descr:          Accounts, please contact:
descr:          * abuse@microsoft.com
descr:          To report security vulnerabilities in Microsoft
descr:          products and services, please contact:
descr:          * secure@microsoft.com
descr:          For legal and law enforcement-related requests,
descr:          please contact:
descr:          * msndcc@microsoft.com
descr:          For routing, peering or DNS issues, please
descr:          contact:
descr:          * IOC@microsoft.com
address:        One Microsoft Way
address:        WA 98052
address:        Redmond
address:        UNITED STATES
phone:          +1 425 882 8080
fax-no:         +1 425 936 7329
abuse-c:        MAC274-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MICROSOFT-MAINT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MICROSOFT-MAINT
created:        2004-04-17T12:18:10Z
last-modified:  2026-05-13T07:29:58Z
source:         RIPE # Filtered

role:           Microsoft Routing, Peering, and DNS
address:        One Microsoft Way
address:        Redmond, WA 98052
nic-hdl:        MRPA3-RIPE
mnt-by:         MICROSOFT-MAINT
created:        2014-08-26T16:25:24Z
last-modified:  2014-08-26T16:25:24Z
source:         RIPE # Filtered

person:         Divya Quamara
address:        One Microsoft Way
address:        Redmond, WA 98052
phone:          +1-425-882-8080
nic-hdl:        DH5439-RIPE
mnt-by:         MICROSOFT-MAINT
created:        2014-08-26T16:24:14Z
last-modified:  2016-02-19T07:09:41Z
source:         RIPE

% Information related to '2a01:111:f000::/36AS8075'

route6:         2a01:111:f000::/36
origin:         AS8075
descr:          Microsoft
mnt-by:         MICROSOFT-MAINT
created:        2020-08-17T14:18:22Z
last-modified:  2020-08-17T14:18:22Z
source:         RIPE # Filtered

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

RDAP

The JSON replies WHOIS is being replaced by.

RIPE NCC https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4

{
    "handle": "2a01:110::/31",
    "startAddress": "2a01:110::",
    "endAddress": "2a01:111:ffff:ffff:ffff:ffff:ffff:ffff",
    "ipVersion": "v6",
    "name": "UK-MICROSOFT-20060601",
    "type": "ALLOCATED-BY-RIR",
    "country": "GB",
    "parentHandle": "2a00::/11",
    "cidr0_cidrs": [
        {
            "v6prefix": "2a01:110::",
            "length": 31
        }
    ],
    "status": [
        "active"
    ],
    "entities": [
        {
            "handle": "DH5439-RIPE",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "Divya Quamara"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "individual"
                    ],
                    [
                        "adr",
                        {
                            "label": "One Microsoft Way\nRedmond, WA 98052"
                        },
                        "text",
                        [
                            "",
                            "",
                            "",
                            "",
                            "",
                            "",
                            ""
                        ]
                    ],
                    [
                        "tel",
                        {
                            "type": "voice"
                        },
                        "text",
                        "+1-425-882-8080"
                    ]
                ]
            ],
            "roles": [
                "administrative"
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "self",
                    "href": "https://rdap.db.ripe.net/entity/DH5439-RIPE"
                },
                {
                    "value": "http://www.ripe.net/data-tools/support/documentation/terms",
                    "rel": "copyright",
                    "href": "http://www.ripe.net/data-tools/support/documentation/terms"
                }
            ],
            "objectClassName": "entity"
        },
        {
            "handle": "MICROSOFT-MAINT",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "MICROSOFT-MAINT"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "individual"
                    ]
                ]
            ],
            "roles": [
                "registrant"
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "self",
                    "href": "https://rdap.db.ripe.net/entity/MICROSOFT-MAINT"
                },
                {
                    "value": "http://www.ripe.net/data-tools/support/documentation/terms",
                    "rel": "copyright",
                    "href": "http://www.ripe.net/data-tools/support/documentation/terms"
                }
            ],
            "objectClassName": "entity"
        },
        {
            "handle": "MRPA3-RIPE",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "Microsoft Routing, Peering, and DNS"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "group"
                    ],
                    [
                        "adr",
                        {
                            "label": "One Microsoft Way\nRedmond, WA 98052"
                        },
                        "text",
                        [
                            "",
                            "",
                            "",
                            "",
                            "",
                            "",
                            ""
                        ]
                    ]
                ]
            ],
            "roles": [
                "technical"
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "self",
                    "href": "https://rdap.db.ripe.net/entity/MRPA3-RIPE"
                },
                {
                    "value": "http://www.ripe.net/data-tools/support/documentation/terms",
                    "rel": "copyright",
                    "href": "http://www.ripe.net/data-tools/support/documentation/terms"
                }
            ],
            "objectClassName": "entity"
        },
        {
            "handle": "ORG-MA42-RIPE",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "Microsoft Limited"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "org"
                    ],
                    [
                        "adr",
                        {
                            "label": "One Microsoft Way\nWA 98052\nRedmond\nUNITED STATES"
                        },
                        "text",
                        [
                            "",
                            "",
                            "",
                            "",
                            "",
                            "",
                            ""
                        ]
                    ],
                    [
                        "tel",
                        {
                            "type": "voice"
                        },
                        "text",
                        "+1 425 882 8080"
                    ],
                    [
                        "tel",
                        {
                            "type": "fax"
                        },
                        "text",
                        "+1 425 936 7329"
                    ]
                ]
            ],
            "roles": [
                "registrant"
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "self",
                    "href": "https://rdap.db.ripe.net/entity/ORG-MA42-RIPE"
                },
                {
                    "value": "http://www.ripe.net/data-tools/support/documentation/terms",
                    "rel": "copyright",
                    "href": "http://www.ripe.net/data-tools/support/documentation/terms"
                }
            ],
            "objectClassName": "entity"
        },
        {
            "handle": "RIPE-NCC-HM-MNT",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "RIPE-NCC-HM-MNT"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "individual"
                    ],
                    [
                        "org",
                        [],
                        "text",
                        "ORG-NCC1-RIPE"
                    ]
                ]
            ],
            "roles": [
                "registrant"
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "self",
                    "href": "https://rdap.db.ripe.net/entity/RIPE-NCC-HM-MNT"
                },
                {
                    "value": "http://www.ripe.net/data-tools/support/documentation/terms",
                    "rel": "copyright",
                    "href": "http://www.ripe.net/data-tools/support/documentation/terms"
                }
            ],
            "objectClassName": "entity"
        },
        {
            "handle": "MAC274-RIPE",
            "vcardArray": [
                "vcard",
                [
                    [
                        "version",
                        [],
                        "text",
                        "4.0"
                    ],
                    [
                        "fn",
                        [],
                        "text",
                        "Microsoft Abuse Contact"
                    ],
                    [
                        "kind",
                        [],
                        "text",
                        "group"
                    ],
                    [
                        "adr",
                        {
                            "label": "One Microsoft Way\nRedmond, WA 98052"
                        },
                        "text",
                        [
                            "",
                            "",
                            "",
                            "",
                            "",
                            "",
                            ""
                        ]
                    ],
                    [
                        "email",
                        {
                            "type": "abuse"
                        },
                        "text",
                        "abuse@microsoft.com"
                    ]
                ]
            ],
            "roles": [
                "abuse"
            ],
            "entities": [
                {
                    "handle": "MICROSOFT-MAINT",
                    "vcardArray": [
                        "vcard",
                        [
                            [
                                "version",
                                [],
                                "text",
                                "4.0"
                            ],
                            [
                                "fn",
                                [],
                                "text",
                                "MICROSOFT-MAINT"
                            ],
                            [
                                "kind",
                                [],
                                "text",
                                "individual"
                            ]
                        ]
                    ],
                    "roles": [
                        "registrant"
                    ],
                    "links": [
                        {
                            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                            "rel": "self",
                            "href": "https://rdap.db.ripe.net/entity/MICROSOFT-MAINT"
                        },
                        {
                            "value": "http://www.ripe.net/data-tools/support/documentation/terms",
                            "rel": "copyright",
                            "href": "http://www.ripe.net/data-tools/support/documentation/terms"
                        }
                    ],
                    "objectClassName": "entity"
                }
            ],
            "objectClassName": "entity"
        }
    ],
    "links": [
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "rdap-up",
            "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/2a01:110::/31",
            "type": "application/rdap+json"
        },
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "rdap-up rdap-active",
            "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/2a01:110::/31?status=active",
            "type": "application/rdap+json"
        },
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "rdap-down",
            "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-down/2a01:110::/31",
            "type": "application/rdap+json"
        },
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "rdap-top",
            "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/2a01:110::/31",
            "type": "application/rdap+json"
        },
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "rdap-top rdap-active",
            "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/2a01:110::/31?status=active",
            "type": "application/rdap+json"
        },
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "rdap-bottom",
            "href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-bottom/2a01:110::/31",
            "type": "application/rdap+json"
        },
        {
            "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "rel": "self",
            "href": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
            "type": "application/rdap+json"
        },
        {
            "value": "http://www.ripe.net/data-tools/support/documentation/terms",
            "rel": "copyright",
            "href": "http://www.ripe.net/data-tools/support/documentation/terms"
        }
    ],
    "events": [
        {
            "eventAction": "registration",
            "eventDate": "2006-06-01T08:53:35Z"
        },
        {
            "eventAction": "last changed",
            "eventDate": "2016-07-12T17:06:10Z"
        }
    ],
    "rdapConformance": [
        "geofeed1",
        "rirSearch1",
        "ips",
        "cidr0",
        "rdap_level_0",
        "nro_rdap_profile_0",
        "redacted"
    ],
    "notices": [
        {
            "title": "Filtered",
            "description": [
                "This output has been filtered."
            ]
        },
        {
            "title": "Whois Inaccuracy Reporting",
            "description": [
                "If you see inaccuracies in the results, please visit:"
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "inaccuracy-report",
                    "href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
                    "type": "text/html"
                }
            ]
        },
        {
            "title": "Source",
            "description": [
                "Objects returned came from source",
                "RIPE"
            ]
        },
        {
            "title": "Terms and Conditions",
            "description": [
                "This is the RIPE Database query service. The objects are in RDAP format."
            ],
            "links": [
                {
                    "value": "https://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4",
                    "rel": "terms-of-service",
                    "href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
                    "type": "application/pdf"
                }
            ]
        }
    ],
    "port43": "whois.ripe.net",
    "objectClassName": "ip network",
    "redacted": [
        {
            "name": {
                "description": "Personal e-mail information"
            },
            "reason": {
                "description": "Personal data"
            },
            "prePath": "$.entities[?(@.handle=='MRPA3-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
            "method": "removal"
        },
        {
            "name": {
                "description": "Personal e-mail information"
            },
            "reason": {
                "description": "Personal data"
            },
            "prePath": "$.entities[?(@.handle=='ORG-MA42-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
            "method": "removal"
        },
        {
            "name": {
                "description": "Personal e-mail information"
            },
            "reason": {
                "description": "Personal data"
            },
            "prePath": "$.entities[?(@.handle=='MAC274-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
            "method": "removal"
        }
    ]
}

Servers asked

ProtocolServerResultTime
RDAPhttps://rdap.db.ripe.net/ip/2a01:111:f403:f90a::4HTTP 20068 ms
WHOISwhois.ripe.net “2a01:111:f403:f90a::4”3,325 bytes38 ms