AS37963
Hangzhou Alibaba Advertising Co.,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
- Active-threat / abuse risk −12
- Enterprise allocation +4
- Trust score 57 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 16 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS37963 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 59.82.136.0/23 | AS37963, AS45102 | 2026-10-14 06:28:59 |
| 223.6.6.0/24 | AS37963, AS45102 | 2026-10-14 06:28:59 |
| 8.148.37.0/24 | AS24429, AS37963 | 2026-10-14 06:28:59 |
| 8.148.36.0/24 | AS24429, AS37963 | 2026-10-14 06:28:59 |
| 223.5.5.0/24 | AS37963, AS45102 | 2026-10-14 06:28:59 |
| 8.148.43.0/24 | AS24429, AS37963 | 2026-10-14 06:28:59 |
| 110.76.23.0/24 | AS37963, AS45102 | 2026-10-14 06:28:59 |
| 8.148.38.0/24 | AS24429, AS37963 | 2026-10-14 06:28:59 |
| 203.107.48.0/23 | AS37963, AS134963 | 2026-10-14 06:28:59 |
| 203.107.50.0/23 | AS37963, AS134963 | 2026-10-14 06:28:59 |
| 110.76.21.0/24 | AS37963, AS45102 | 2026-10-14 06:28:59 |
| 8.148.41.0/24 | AS24429, AS37963 | 2026-10-14 06:28:59 |
| 8.148.39.0/24 | AS24429, AS37963 | 2026-10-14 06:28:59 |
| 140.205.122.0/24 | AS37963, AS45102 | 2026-10-13 19:58:56 |
| 140.205.1.0/24 | AS37963, AS45102 | 2026-10-13 19:58:56 |
Showing the 15 most recently detected of 16 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.
Network profile
Source: PeeringDB →Present at 3 internet exchanges: CNIX, NNIX, SHIXP
Web3 footprint
AS37963 hosts 15 observed decentralized-network nodes across 5 networks. 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 AS37963 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 |
|---|---|---|
| 47.104.0.0/13 | 143,627 | 2026-07-21 11:28:39 |
| 101.200.0.0/15 | 110,712 | 2026-10-14 06:22:45 |
| 112.126.0.0/16 | 109,700 | 2026-10-14 06:22:45 |
| 39.104.0.0/14 | 103,069 | 2026-10-14 06:22:45 |
| 47.92.0.0/14 | 102,765 | 2026-10-14 06:22:45 |
| 39.96.0.0/13 | 102,739 | 2026-10-14 06:22:45 |
| 59.110.0.0/16 | 102,517 | 2026-10-14 06:22:45 |
| 112.125.0.0/16 | 98,230 | 2026-10-14 06:22:45 |
| 123.56.0.0/15 | 97,253 | 2026-10-14 06:22:45 |
| 203.209.242.0/23 | 97,112 | 2026-10-14 06:22:45 |
| 203.119.192.0/18 | 96,916 | 2026-10-14 06:22:45 |
| 203.119.168.0/21 | 96,757 | 2026-10-14 06:22:45 |
| 203.119.176.0/20 | 96,747 | 2026-10-14 06:22:45 |
| 8.165.0.0/16 | 50,521 | 2026-10-14 06:24:57 |
| 8.134.240.0/21 | 46,710 | 2026-10-14 06:24:57 |
| 8.176.32.0/20 | 45,517 | 2026-10-14 06:22:45 |
| 8.176.48.0/20 | 45,430 | 2026-10-14 06:22:45 |
| 114.55.0.0/17 | 44,742 | 2026-10-14 06:22:45 |
| 114.55.128.0/17 | 44,446 | 2026-10-14 06:22:45 |
| 8.137.0.0/16 | 43,971 | 2026-10-14 06:24:57 |
| 114.215.164.0/22 | 43,737 | 2026-10-14 06:22:45 |
| 8.150.8.0/21 | 43,386 | 2026-10-14 06:24:57 |
| 8.128.96.0/21 | 43,365 | 2026-10-14 06:24:57 |
| 8.150.0.0/22 | 43,330 | 2026-10-14 06:24:57 |
| 8.156.0.0/16 | 43,176 | 2026-10-14 06:24:57 |
| 8.146.0.0/16 | 43,171 | 2026-10-14 06:22:45 |
| 114.215.220.0/22 | 42,994 | 2026-10-14 06:22:45 |
| 8.176.128.0/19 | 42,875 | 2026-10-14 06:24:57 |
| 8.147.128.0/17 | 42,816 | 2026-10-14 06:22:45 |
| 8.144.0.0/15 | 42,798 | 2026-10-14 06:22:45 |
| 8.147.0.0/17 | 42,592 | 2026-10-14 06:22:45 |
| 8.148.192.0/18 | 41,755 | 2026-10-14 06:22:45 |
| 8.162.0.0/20 | 41,745 | 2026-10-14 06:22:45 |
| 8.138.0.0/17 | 41,697 | 2026-10-14 06:22:45 |
| 8.128.104.0/22 | 41,667 | 2026-10-14 06:22:45 |
| 8.154.0.0/17 | 41,619 | 2026-10-14 06:22:45 |
| 8.148.128.0/18 | 41,586 | 2026-10-14 06:22:45 |
| 8.128.108.0/22 | 41,570 | 2026-10-14 06:22:45 |
| 8.134.0.0/17 | 41,522 | 2026-10-14 06:22:45 |
| 8.148.64.0/20 | 41,519 | 2026-10-14 06:22:45 |
| 8.148.16.0/20 | 41,504 | 2026-10-14 06:22:45 |
| 8.138.128.0/17 | 41,484 | 2026-10-14 06:22:45 |
| 8.136.0.0/17 | 41,471 | 2026-10-14 06:22:45 |
| 8.148.96.0/20 | 41,466 | 2026-10-14 06:22:45 |
| 8.167.0.0/16 | 41,436 | 2026-10-14 06:22:45 |
| 8.136.128.0/17 | 41,420 | 2026-10-14 06:22:45 |
| 8.154.128.0/17 | 41,404 | 2026-10-14 06:22:45 |
| 8.148.0.0/20 | 41,382 | 2026-10-14 06:22:45 |
| 8.149.0.0/17 | 41,378 | 2026-10-14 06:22:45 |
| 8.138.69.0/24 | 41,372 | 2026-10-14 06:22:45 |
Showing top 50 of 866 announced prefixes by sample volume.
Frequently Asked Questions
What is AS37963?
AS37963 is an Autonomous System Number assigned to Hangzhou Alibaba Advertising Co.,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 AS37963 announce?
AS37963 announces 9.42M IPv4 addresses distributed across 144 routed CIDR prefixes. The network is registered in China.
Who operates AS37963?
AS37963 is operated by Hangzhou Alibaba Advertising Co.,Ltd.. The organization is based in China. You can view all IP ranges and related ASNs on the organization page.
What country is AS37963 registered in?
AS37963 is registered in China. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
