AS23881
UDomain Web Hosting Company Limited
Registration
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
| Prefix | Range | Addresses |
|---|---|---|
| 23.226.0.0/24 | 23.226.0.0 – 23.226.0.255 | 256 |
| 23.226.1.0/24 | 23.226.1.0 – 23.226.1.255 | 256 |
| 23.226.2.0/24 | 23.226.2.0 – 23.226.2.255 | 256 |
| 23.226.3.0/24 | 23.226.3.0 – 23.226.3.255 | 256 |
| 23.226.4.0/24 | 23.226.4.0 – 23.226.4.255 | 256 |
| 23.226.6.0/24 | 23.226.6.0 – 23.226.6.255 | 256 |
| 23.226.7.0/24 | 23.226.7.0 – 23.226.7.255 | 256 |
| 23.226.8.0/24 | 23.226.8.0 – 23.226.8.255 | 256 |
| 23.226.11.0/24 | 23.226.11.0 – 23.226.11.255 | 256 |
45.0.0.0/8 · 10 prefixes · 2,560 addresses
| Prefix | Range | Addresses |
|---|---|---|
| 45.121.192.0/24 | 45.121.192.0 – 45.121.192.255 | 256 |
| 45.121.193.0/24 | 45.121.193.0 – 45.121.193.255 | 256 |
| 45.121.194.0/24 | 45.121.194.0 – 45.121.194.255 | 256 |
| 45.121.196.0/24 | 45.121.196.0 – 45.121.196.255 | 256 |
| 45.121.197.0/24 | 45.121.197.0 – 45.121.197.255 | 256 |
| 45.121.198.0/24 | 45.121.198.0 – 45.121.198.255 | 256 |
| 45.121.199.0/24 | 45.121.199.0 – 45.121.199.255 | 256 |
| 45.121.200.0/24 | 45.121.200.0 – 45.121.200.255 | 256 |
| 45.121.201.0/24 | 45.121.201.0 – 45.121.201.255 | 256 |
| 45.121.203.0/24 | 45.121.203.0 – 45.121.203.255 | 256 |
103.0.0.0/8 · 12 prefixes · 3,072 addresses
| Prefix | Range | Addresses |
|---|---|---|
| 103.15.180.0/24 | 103.15.180.0 – 103.15.180.255 | 256 |
| 103.15.181.0/24 | 103.15.181.0 – 103.15.181.255 | 256 |
| 103.15.183.0/24 | 103.15.183.0 – 103.15.183.255 | 256 |
| 103.15.192.0/24 | 103.15.192.0 – 103.15.192.255 | 256 |
| 103.15.194.0/24 | 103.15.194.0 – 103.15.194.255 | 256 |
| 103.15.195.0/24 | 103.15.195.0 – 103.15.195.255 | 256 |
| 103.15.196.0/24 | 103.15.196.0 – 103.15.196.255 | 256 |
| 103.15.197.0/24 | 103.15.197.0 – 103.15.197.255 | 256 |
| 103.15.199.0/24 | 103.15.199.0 – 103.15.199.255 | 256 |
| 103.19.25.0/24 | 103.19.25.0 – 103.19.25.255 | 256 |
| 103.19.26.0/24 | 103.19.26.0 – 103.19.26.255 | 256 |
| 103.19.27.0/24 | 103.19.27.0 – 103.19.27.255 | 256 |
162.0.0.0/8 · 3 prefixes · 768 addresses
| Prefix | Range | Addresses |
|---|---|---|
| 162.247.0.0/24 | 162.247.0.0 – 162.247.0.255 | 256 |
| 162.247.2.0/24 | 162.247.2.0 – 162.247.2.255 | 256 |
| 162.247.3.0/24 | 162.247.3.0 – 162.247.3.255 | 256 |
203.0.0.0/8 · 37 prefixes · 9,472 addresses
| Prefix | Range | Addresses |
|---|---|---|
| 203.90.224.0/24 | 203.90.224.0 – 203.90.224.255 | 256 |
| 203.90.225.0/24 | 203.90.225.0 – 203.90.225.255 | 256 |
| 203.90.226.0/24 | 203.90.226.0 – 203.90.226.255 | 256 |
| 203.90.227.0/24 | 203.90.227.0 – 203.90.227.255 | 256 |
| 203.90.228.0/24 | 203.90.228.0 – 203.90.228.255 | 256 |
| 203.90.229.0/24 | 203.90.229.0 – 203.90.229.255 | 256 |
| 203.90.230.0/24 | 203.90.230.0 – 203.90.230.255 | 256 |
| 203.90.254.0/24 | 203.90.254.0 – 203.90.254.255 | 256 |
| 203.135.128.0/24 | 203.135.128.0 – 203.135.128.255 | 256 |
| 203.135.129.0/24 | 203.135.129.0 – 203.135.129.255 | 256 |
| 203.135.130.0/24 | 203.135.130.0 – 203.135.130.255 | 256 |
| 203.135.131.0/24 | 203.135.131.0 – 203.135.131.255 | 256 |
| 203.135.132.0/24 | 203.135.132.0 – 203.135.132.255 | 256 |
| 203.135.133.0/24 | 203.135.133.0 – 203.135.133.255 | 256 |
| 203.135.134.0/24 | 203.135.134.0 – 203.135.134.255 | 256 |
| 203.135.135.0/24 | 203.135.135.0 – 203.135.135.255 | 256 |
| 203.135.136.0/24 | 203.135.136.0 – 203.135.136.255 | 256 |
| 203.135.137.0/24 | 203.135.137.0 – 203.135.137.255 | 256 |
| 203.135.138.0/24 | 203.135.138.0 – 203.135.138.255 | 256 |
| 203.135.139.0/24 | 203.135.139.0 – 203.135.139.255 | 256 |
| 203.135.140.0/24 | 203.135.140.0 – 203.135.140.255 | 256 |
| 203.135.141.0/24 | 203.135.141.0 – 203.135.141.255 | 256 |
| 203.135.142.0/24 | 203.135.142.0 – 203.135.142.255 | 256 |
| 203.135.143.0/24 | 203.135.143.0 – 203.135.143.255 | 256 |
| 203.135.146.0/24 | 203.135.146.0 – 203.135.146.255 | 256 |
| 203.135.147.0/24 | 203.135.147.0 – 203.135.147.255 | 256 |
| 203.135.148.0/24 | 203.135.148.0 – 203.135.148.255 | 256 |
| 203.135.149.0/24 | 203.135.149.0 – 203.135.149.255 | 256 |
| 203.135.150.0/24 | 203.135.150.0 – 203.135.150.255 | 256 |
| 203.135.151.0/24 | 203.135.151.0 – 203.135.151.255 | 256 |
| 203.135.153.0/24 | 203.135.153.0 – 203.135.153.255 | 256 |
| 203.135.154.0/24 | 203.135.154.0 – 203.135.154.255 | 256 |
| 203.135.155.0/24 | 203.135.155.0 – 203.135.155.255 | 256 |
| 203.135.156.0/24 | 203.135.156.0 – 203.135.156.255 | 256 |
| 203.135.157.0/24 | 203.135.157.0 – 203.135.157.255 | 256 |
| 203.135.158.0/24 | 203.135.158.0 – 203.135.158.255 | 256 |
| 203.135.159.0/24 | 203.135.159.0 – 203.135.159.255 | 256 |
IPv6 Prefixes
2 prefixes · 2 × /48 Routing data as of 2026-10-06 16:00 UTC
| Prefix | Addresses |
|---|---|
| 2400:c300:: | 280 |
| 2400:c300:1:: | 280 |
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. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (5)
AS Name AS paths IPv4 sightings IPv6 sightings AS9304 HUTCHISON-AS-AP - HGC Global Communications Limited 524 14,105 735 AS140570 HKBCS-AS-AP - Hong Kong Beecloud System Technology Services Limited 319 10,423 0 AS60068 CDN77 Datacamp Limited 271 339 0 AS4515 PCCW-AS-AP - PCCW IMS Ltd (PCCW Business Internet Access) 258 337 0 AS10098 HENDERSON-HK - Towngas Telecommunications Fixed Network Ltd 4 4 0
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.