AS23881
UDomain Web Hosting Company Ltd
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Hosting allocation −6
- Trust score 59 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: HKIX: HKIX Peering LAN
Web3 footprint
AS23881 hosts 4 observed decentralized-network nodes across 1 network. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS23881 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 23.226.2.0/24 | 871,123 | 2026-07-18 11:36:59 |
| 23.226.11.0/24 | 870,170 | 2026-07-18 11:36:59 |
| 23.226.0.0/24 | 869,918 | 2026-07-18 11:36:59 |
| 23.226.4.0/24 | 869,874 | 2026-07-18 11:36:59 |
| 23.226.3.0/24 | 869,777 | 2026-07-18 11:36:59 |
| 23.226.1.0/24 | 869,748 | 2026-07-18 11:36:59 |
| 23.226.8.0/24 | 869,422 | 2026-07-18 11:36:59 |
| 23.226.6.0/24 | 868,804 | 2026-07-18 11:36:59 |
| 23.226.7.0/24 | 756,980 | 2026-07-18 11:36:54 |
| 45.121.194.0/24 | 608,668 | 2026-07-18 11:36:54 |
| 45.121.196.0/24 | 607,896 | 2026-07-18 11:36:54 |
| 45.121.200.0/24 | 607,495 | 2026-07-18 11:36:54 |
| 45.121.192.0/24 | 607,344 | 2026-07-18 11:36:54 |
| 45.121.199.0/24 | 607,035 | 2026-07-18 11:36:54 |
| 45.121.198.0/24 | 607,023 | 2026-07-18 11:36:54 |
| 45.121.197.0/24 | 606,914 | 2026-07-18 11:36:54 |
| 45.121.203.0/24 | 606,729 | 2026-07-18 11:36:54 |
| 103.15.192.0/24 | 515,367 | 2026-07-18 11:13:01 |
| 103.15.196.0/24 | 385,561 | 2026-07-18 11:13:01 |
| 103.15.194.0/24 | 385,403 | 2026-07-18 11:13:01 |
| 103.15.199.0/24 | 384,964 | 2026-07-18 11:13:01 |
| 103.15.197.0/24 | 384,525 | 2026-07-18 11:13:01 |
| 103.19.26.0/24 | 383,586 | 2026-07-18 11:13:01 |
| 103.15.181.0/24 | 383,514 | 2026-07-18 11:13:01 |
| 103.15.180.0/24 | 383,110 | 2026-07-18 11:13:01 |
| 203.135.156.0/24 | 362,685 | 2026-07-18 11:13:10 |
| 103.19.25.0/24 | 336,687 | 2026-07-18 11:12:57 |
| 162.247.0.0/24 | 331,038 | 2026-07-18 11:13:01 |
| 162.247.2.0/24 | 330,787 | 2026-07-18 11:13:01 |
| 103.15.195.0/24 | 329,308 | 2026-07-18 11:12:57 |
| 103.15.183.0/24 | 328,462 | 2026-07-18 11:12:57 |
| 103.19.27.0/24 | 326,897 | 2026-07-18 11:12:57 |
| 203.135.129.0/24 | 319,724 | 2026-07-18 11:13:00 |
| 162.247.3.0/24 | 281,401 | 2026-07-18 11:12:57 |
| 203.90.254.0/24 | 280,410 | 2026-07-18 11:13:01 |
| 203.90.230.0/24 | 279,824 | 2026-07-18 11:13:01 |
| 203.90.225.0/24 | 279,796 | 2026-07-18 11:13:01 |
| 203.90.224.0/24 | 279,742 | 2026-07-18 11:13:01 |
| 203.90.227.0/24 | 279,279 | 2026-07-18 11:13:01 |
| 203.90.226.0/24 | 279,252 | 2026-07-18 11:13:01 |
| 203.90.229.0/24 | 279,244 | 2026-07-18 11:13:01 |
| 203.90.228.0/24 | 279,166 | 2026-07-18 11:13:01 |
| 203.135.134.0/24 | 277,338 | 2026-07-18 11:13:01 |
| 203.135.137.0/24 | 277,144 | 2026-07-18 11:13:01 |
| 203.135.130.0/24 | 276,945 | 2026-07-18 11:13:01 |
| 203.135.128.0/24 | 276,916 | 2026-07-18 11:13:01 |
| 203.135.146.0/24 | 276,835 | 2026-07-18 11:13:01 |
| 203.135.140.0/24 | 276,832 | 2026-07-18 11:13:01 |
| 203.135.141.0/24 | 276,819 | 2026-07-18 11:13:01 |
| 203.135.143.0/24 | 276,818 | 2026-07-18 11:13:01 |
Showing top 50 of 79 announced prefixes by sample volume.
Frequently Asked Questions
What is AS23881?
AS23881 is an Autonomous System Number assigned to UDomain Web Hosting Company Ltd. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS23881 announce?
AS23881 announces 17.9K IPv4 addresses distributed across 30 routed CIDR prefixes. The network is registered in Hong Kong.
Who operates AS23881?
AS23881 is operated by UDomain Web Hosting Company Ltd. The organization is based in Hong Kong. You can view all IP ranges and related ASNs on the organization page.
What country is AS23881 registered in?
AS23881 is registered in Hong Kong. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
