AS37963 ALIBABA-CN-NET Hangzhou Alibaba Advertising Co.,Ltd.
Announced Prefixes (BGP)
959total
830 IPv4129 IPv6
IPv4 Addresses
Allocated (RIR)5.6M
Announced (BGP)20.6M
IPv6 Addresses
Allocated (RIR)8.1×10³¹
Announced (BGP)8.4×10³¹
Prefix Limit (IPv4)
10,000
Prefix Limit (IPv6)
500
Allocated
-
Listed on the threat map (2026-10-08)
- #6 of the 50 networks with the most flagged IPs worldwide (285 flagged networks)
- #2 in China (285 flagged networks located there)
- #1 for other malicious networks (172 flagged networks)
Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.
Announced Prefixes
(BGP)959|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - | |
| Valid | APNIC | - |
1-10 of 959
1 / 96
Allocated Prefixes
(RIR)68Prefix | Country | RIR | Status |
|---|---|---|---|
| 8.150.64.0/24 | 🇨🇳 CN | APNIC | assigned |
| 39.96.0.0/13 | 🇨🇳 CN | APNIC | allocated |
| 39.104.0.0/14 | 🇨🇳 CN | APNIC | allocated |
| 39.108.0.0/16 | 🇨🇳 CN | APNIC | allocated |
| 42.96.128.0/17 | 🇨🇳 CN | APNIC | allocated |
| 42.120.128.0/17 | 🇨🇳 CN | APNIC | assigned |
| 42.156.128.0/17 | 🇨🇳 CN | APNIC | allocated |
| 42.156.128.0/18 | 🇨🇳 CN | APNIC | assigned |
| 42.156.192.0/18 | 🇨🇳 CN | APNIC | assigned |
| 45.113.40.0/22 | 🇨🇳 CN | APNIC | allocated |
1-10 of 68
1 / 7
All 959 announced prefixes of AS37963 →
BGP Neighbours
(seen in AS paths)Upstreams (17)
Networks AS37963 hands its own prefixes to: transit providers, or peers at an exchange.
- AS4811China Telecom (Group)240
- AS4837CHINA UNICOM China169 Backbone142
- AS56041China Mobile Communications Corporation100
- AS9808China Mobile Communications Group95
- AS23724IDC, China Telecommunications Corporation90
- AS4816China Telecom (Group)62
- AS58461No.288,Fu Chun Road52
- AS17621China Unicom Shanghai Network45
- AS4808China Unicom Beijing Province Network37
- AS141425China Mobile Group Guangdong Communications Corporation27
- AS24444Shandong Mobile Communication Company Limited26
- AS135061China Unicom Guangdong IP Network21
- AS136195Qingdao, Shandong Province, P.R.China14
- AS24400Shanghai Mobile Communications2
- AS38283CHINANET SiChuan Telecom Internet Data Center2
- AS136958China Unicom Guangdong IP Network2
- AS58466CHINANET Guangdong Province Network1
ASPA
No ASPA
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- ASPA explainedWhy AS37963 should publish an ASPA object
- IPv4 transfer marketTransfers published by all five RIRs
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/37963Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/37963" | jq