Dashboard / ASN Lookup / AS23881

AS23881

UDomain Web Hosting Company Limited

APNIC HK active Announced
More ASNs in Hong Kong SAR China →
Organization
UDomain Web Hosting Company Limited
UDOMAIN-AS-AP
Registered
Aug 19, 2003
23 years ago
IPv4 Prefixes
71
18,176 addresses
IPv6 Prefixes
2
2 × /48
BGP Neighbours
5
5 upstream/peer · 0 downstream

Registration

AS Number AS23881 AS Name UDOMAIN-AS-AP Organization UDomain Web Hosting Company Limited Organization ID ORG-UWHC1-AP Address 18/F,, Kinox Centre,, 9 Hung To Road,, Kwun Tong, Kowloon. Country Hong Kong SAR China (HK) Registry APNIC Allocated Aug 19, 2003 Record Created Sep 04, 2008 Last Updated Jun 15, 2020 Status
active
WHOIS Server whois.apnic.net AS Description UDOMAIN-AS-AP - UDomain Web Hosting Company Ltd, HK Remarks UDomain Web Hosting Company Ltd, Hong Kong Abuse Email [email protected]

IPv4 Prefixes

71 prefixes · 18,176 addresses Routing data as of 2026-10-06 16:00 UTC

23.0.0.0/8 · 9 prefixes · 2,304 addresses
PrefixRangeAddresses
23.226.0.0/2423.226.0.0 – 23.226.0.255256
23.226.1.0/2423.226.1.0 – 23.226.1.255256
23.226.2.0/2423.226.2.0 – 23.226.2.255256
23.226.3.0/2423.226.3.0 – 23.226.3.255256
23.226.4.0/2423.226.4.0 – 23.226.4.255256
23.226.6.0/2423.226.6.0 – 23.226.6.255256
23.226.7.0/2423.226.7.0 – 23.226.7.255256
23.226.8.0/2423.226.8.0 – 23.226.8.255256
23.226.11.0/2423.226.11.0 – 23.226.11.255256
45.0.0.0/8 · 10 prefixes · 2,560 addresses
PrefixRangeAddresses
45.121.192.0/2445.121.192.0 – 45.121.192.255256
45.121.193.0/2445.121.193.0 – 45.121.193.255256
45.121.194.0/2445.121.194.0 – 45.121.194.255256
45.121.196.0/2445.121.196.0 – 45.121.196.255256
45.121.197.0/2445.121.197.0 – 45.121.197.255256
45.121.198.0/2445.121.198.0 – 45.121.198.255256
45.121.199.0/2445.121.199.0 – 45.121.199.255256
45.121.200.0/2445.121.200.0 – 45.121.200.255256
45.121.201.0/2445.121.201.0 – 45.121.201.255256
45.121.203.0/2445.121.203.0 – 45.121.203.255256
103.0.0.0/8 · 12 prefixes · 3,072 addresses
PrefixRangeAddresses
103.15.180.0/24103.15.180.0 – 103.15.180.255256
103.15.181.0/24103.15.181.0 – 103.15.181.255256
103.15.183.0/24103.15.183.0 – 103.15.183.255256
103.15.192.0/24103.15.192.0 – 103.15.192.255256
103.15.194.0/24103.15.194.0 – 103.15.194.255256
103.15.195.0/24103.15.195.0 – 103.15.195.255256
103.15.196.0/24103.15.196.0 – 103.15.196.255256
103.15.197.0/24103.15.197.0 – 103.15.197.255256
103.15.199.0/24103.15.199.0 – 103.15.199.255256
103.19.25.0/24103.19.25.0 – 103.19.25.255256
103.19.26.0/24103.19.26.0 – 103.19.26.255256
103.19.27.0/24103.19.27.0 – 103.19.27.255256
162.0.0.0/8 · 3 prefixes · 768 addresses
PrefixRangeAddresses
162.247.0.0/24162.247.0.0 – 162.247.0.255256
162.247.2.0/24162.247.2.0 – 162.247.2.255256
162.247.3.0/24162.247.3.0 – 162.247.3.255256
203.0.0.0/8 · 37 prefixes · 9,472 addresses
PrefixRangeAddresses
203.90.224.0/24203.90.224.0 – 203.90.224.255256
203.90.225.0/24203.90.225.0 – 203.90.225.255256
203.90.226.0/24203.90.226.0 – 203.90.226.255256
203.90.227.0/24203.90.227.0 – 203.90.227.255256
203.90.228.0/24203.90.228.0 – 203.90.228.255256
203.90.229.0/24203.90.229.0 – 203.90.229.255256
203.90.230.0/24203.90.230.0 – 203.90.230.255256
203.90.254.0/24203.90.254.0 – 203.90.254.255256
203.135.128.0/24203.135.128.0 – 203.135.128.255256
203.135.129.0/24203.135.129.0 – 203.135.129.255256
203.135.130.0/24203.135.130.0 – 203.135.130.255256
203.135.131.0/24203.135.131.0 – 203.135.131.255256
203.135.132.0/24203.135.132.0 – 203.135.132.255256
203.135.133.0/24203.135.133.0 – 203.135.133.255256
203.135.134.0/24203.135.134.0 – 203.135.134.255256
203.135.135.0/24203.135.135.0 – 203.135.135.255256
203.135.136.0/24203.135.136.0 – 203.135.136.255256
203.135.137.0/24203.135.137.0 – 203.135.137.255256
203.135.138.0/24203.135.138.0 – 203.135.138.255256
203.135.139.0/24203.135.139.0 – 203.135.139.255256
203.135.140.0/24203.135.140.0 – 203.135.140.255256
203.135.141.0/24203.135.141.0 – 203.135.141.255256
203.135.142.0/24203.135.142.0 – 203.135.142.255256
203.135.143.0/24203.135.143.0 – 203.135.143.255256
203.135.146.0/24203.135.146.0 – 203.135.146.255256
203.135.147.0/24203.135.147.0 – 203.135.147.255256
203.135.148.0/24203.135.148.0 – 203.135.148.255256
203.135.149.0/24203.135.149.0 – 203.135.149.255256
203.135.150.0/24203.135.150.0 – 203.135.150.255256
203.135.151.0/24203.135.151.0 – 203.135.151.255256
203.135.153.0/24203.135.153.0 – 203.135.153.255256
203.135.154.0/24203.135.154.0 – 203.135.154.255256
203.135.155.0/24203.135.155.0 – 203.135.155.255256
203.135.156.0/24203.135.156.0 – 203.135.156.255256
203.135.157.0/24203.135.157.0 – 203.135.157.255256
203.135.158.0/24203.135.158.0 – 203.135.158.255256
203.135.159.0/24203.135.159.0 – 203.135.159.255256

IPv6 Prefixes

2 prefixes · 2 × /48 Routing data as of 2026-10-06 16:00 UTC

PrefixAddresses
2400:c300::/48280
2400:c300:1::/48280

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
AS9304HUTCHISON-AS-AP - HGC Global Communications Limited52414,105735
AS140570HKBCS-AS-AP - Hong Kong Beecloud System Technology Services Limited31910,4230
AS60068CDN77 Datacamp Limited2713390
AS4515PCCW-AS-AP - PCCW IMS Ltd (PCCW Business Internet Access)2583370
AS10098HENDERSON-HK - Towngas Telecommunications Fixed Network Ltd440

Raw RDAP Response

{
  "rdapConformance": [
    "history_version_0",
    "nro_rdap_profile_0",
    "nro_rdap_profile_asn_hierarchical_0",
    "cidr0",
    "rdap_level_0"
  ],
  "notices": [
    {
      "title": "Source",
      "description": [
        "Objects returned came from source",
        "APNIC"
      ]
    },
    {
      "title": "Terms and Conditions",
      "description": [
        "This is the APNIC WHOIS Database query service. The objects are in RDAP format."
      ],
      "links": [
        {
          "value": "https://rdap.apnic.net/autnum/23881",
          "rel": "terms-of-service",
          "href": "http://www.apnic.net/db/dbcopyright.html",
          "type": "text/html"
        }
      ]
    },
    {
      "title": "Whois Inaccuracy Reporting",
      "description": [
        "If you see inaccuracies in the results, please visit: "
      ],
      "links": [
        {
          "value": "https://rdap.apnic.net/autnum/23881",
          "rel": "inaccuracy-report",
          "href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
          "type": "text/html"
        }
      ]
    }
  ],
  "country": "HK",
  "name": "UDOMAIN-AS-AP",
  "status": [
    "active"
  ],
  "events": [
    {
      "eventAction": "registration",
      "eventDate": "2008-09-04T06:40:35Z"
    },
    {
      "eventAction": "last changed",
      "eventDate": "2020-06-15T01:32:17Z"
    }
  ],
  "links": [
    {
      "value": "https://rdap.apnic.net/autnum/23881",
      "rel": "self",
      "href": "https://rdap.apnic.net/autnum/23881",
      "type": "application/rdap+json"
    }
  ],
  "remarks": [
    {
      "description": [
        "UDomain Web Hosting Company Ltd",
        "Hong Kong"
      ],
      "title": "description"
    }
  ],
  "entities": [
    {
      "roles": [
        "technical",
        "administrative"
      ],
      "events": [
        {
          "eventAction": "registration",
          "eventDate": "2017-10-16T08:19:55Z"
        },
        {
          "eventAction": "last changed",
          "eventDate": "2017-10-16T08:26:03Z"
        }
      ],
      "links": [
        {
          "value": "https://rdap.apnic.net/autnum/23881",
          "rel": "self",
          "href": "https://rdap.apnic.net/entity/UA32-AP",
          "type": "application/rdap+json"
        }
      ],
      "handle": "UA32-AP",
      "objectClassName": "entity",
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "UDOMAIN ADMINISTRATORS"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "adr",
            {
              "label": "Unit A - D, 6th Floor, Wing Cheung Industrial Building, No. 109 How Ming Street, Kwun Tong, Kowloon"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "tel",
            {
              "type": "voice"
            },
            "text",
            "+852 2554 7545"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ]
        ]
      ]
    },
    {
      "roles": [
        "registrant"
      ],
      "events": [
        {
          "eventAction": "registration",
          "eventDate": "2017-08-08T23:28:58Z"
        },
        {
          "eventAction": "last changed",
          "eventDate": "2023-09-05T02:14:57Z"
        }
      ],
      "links": [
        {
          "value": "https://rdap.apnic.net/autnum/23881",
          "rel": "self",
          "href": "https://rdap.apnic.net/entity/ORG-UWHC1-AP",
          "type": "application/rdap+json"
        }
      ],
      "handle": "ORG-UWHC1-AP",
      "objectClassName": "entity",
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "UDomain Web Hosting Company Limited"
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ],
          [
            "adr",
            {
              "label": "18/F,\nKinox Centre,\n9 Hung To Road,\nKwun Tong, Kowloon."
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "tel",
            {
              "type": "voice"
            },
            "text",
            "+852-2554-7545"
          ],
          [
            "tel",
            {
              "type": "fax"
            },
            "text",
            "+852-2554-7900"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ]
        ]
      ]
    },
    {
      "roles": [
        "abuse"
      ],
      "events": [
        {
          "eventAction": "registration",
          "eventDate": "2012-02-16T10:04:56Z"
        },
        {
          "eventAction": "last changed",
          "eventDate": "2026-03-25T13:11:03Z"
        }
      ],
      "links": [
        {
          "value": "https://rdap.apnic.net/autnum/23881",
          "rel": "self",
          "href": "https://rdap.apnic.net/entity/IRT-UDOMAIN-HK",
          "type": "application/rdap+json"
        }
      ],
      "remarks": [
        {
          "description": [
            "[email protected] is invalid"
          ],
          "title": "remarks"
        }
      ],
      "handle": "IRT-UDOMAIN-HK",
      "objectClassName": "entity",
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "IRT-UDOMAIN-HK"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "adr",
            {
              "label": "18/F, Kinox Centre, 9 Hung To Road, Hong Kong\nHong Kong"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ],
          [
            "email",
            {
              "pref": "1"
            },
            "text",
            "[email protected]"
          ]
        ]
      ]
    }
  ],
  "handle": "AS23881",
  "startAutnum": 23881,
  "endAutnum": 23881,
  "objectClassName": "autnum",
  "port43": "whois.apnic.net"
}

Contact details of private individuals are redacted.