AS204921 YunZheng-Network zhenyun sun
🇬🇧Org handle: ORG-ZS89-RIPE
Yunzheng.Space Research Network
RIPE NCCallocatedASPA Published
Announced Prefixes (BGP)
30total
8 IPv422 IPv6
IPv4 Addresses
Allocated (RIR)3,072
Announced (BGP)3,328
IPv6 Addresses
Allocated (RIR)6.6×10²⁶
Announced (BGP)4.4×10²⁵
Prefix Limit (IPv4)
20
Prefix Limit (IPv6)
100
Country
🇬🇧 GBRIR
RIPE NCCStatus
allocated
Allocated
2025-10-10
Routing hygiene
Score 31/100 · Medium riskRPKI ROA coverage
93.3%
2 prefixes RPKI invalid
IRR route objects
93.3%
2 prefixes registered for another origin
Hijack signals
2
2 announced against others' ROAs, 0 own announced by others
Upstreams
14
diversity 87/100
- Announces 2 prefixes that RPKI assigns to another network (possible hijack or misconfiguration)
- 7% of announced prefixes (2 of 30) have no valid ROA, 2 of them RPKI invalid
Based on 30 announced prefixes, updated daily (2026-10-23). How the score works · RPKI explained
Announced Prefixes
(BGP)30|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
142.249.114.0/24MOAS | Invalid | - | - |
142.249.115.0/24MOAS | Invalid | - | - |
| Valid | Other IRRRIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | RIPE | - | |
| Valid | ARINOther IRR | - | |
| Valid | Other IRRRIPE | - |
1-10 of 30
1 / 3
Allocated Prefixes
(RIR)32Prefix | Country | RIR | Status |
|---|---|---|---|
| 177.177.80.0/22 | 🇹🇼 TW | RIPE | assigned |
| 177.177.80.0/23 | 🇹🇼 TW | RIPE | assigned |
| 177.177.80.0/24 | 🇹🇼 TW | RIPE | assigned |
| 177.177.81.0/24 | 🇭🇰 HK | RIPE | assigned |
| 177.177.82.0/23 | 🇹🇼 TW | RIPE | assigned |
| 177.177.82.0/24 | 🇹🇼 TW | RIPE | assigned |
| 177.177.83.0/24 | 🇳🇱 NL | RIPE | assigned |
| 2a0e:aa07:e250::/44 | 🇬🇧 GB | RIPE | assigned |
| 2a0e:aa07:e251::/48 | 🇯🇵 JP | RIPE | assigned |
| 2a0e:aa07:e252::/48 | 🇹🇼 TW | RIPE | assigned |
1-10 of 32
1 / 4
All 30 announced prefixes of AS204921 →
Upstream Providers(16)
| ASN | Name |
|---|---|
| AS6939 | 🇺🇸HURRICANE - Hurricane Electric LLC |
| AS11421 | 🇺🇸HYWG-BACKBONE - HYW |
| AS11967 | 🇪🇪HOP179 Hop179 OU |
| AS17408 | 🇹🇼ABOVE-AS-AP - AboveNet Communications Taiwan |
| AS18423 | RAID-AS-TW - RAID Networks Co., Ltd. |
| AS36530 | 🇺🇸FUTURE-LAIN - IDC Cube |
| AS40792 | 🇺🇸CYBERVERSE - CYBERVERSE |
| AS44324 | 🇺🇸MOEDOVE-AS MoeDove LLC |
| AS51087 | 🇬🇧BLING-AS Bling Network Ltd |
| AS140096 | 🇭🇰JINX-AS-AP - JINX CO., LIMITED |
| AS199310 | 🇨🇳QFLink-AS XIN BING XIAN |
| AS204211 | 🇨🇳LOCYAN-NETWORK-AS Shanghai Yingyun Network Technology Co., Ltd. |
| AS204539 | 🇬🇧AXIC-Axivora-Connect-Ltd Axivora Connect Ltd |
| AS204844 | 🇬🇧NCSE-NETWORK-Global NCSE NETWORK LTD |
| AS206216 | 🇺🇸ADVIN-AS Advin Services LLC |
| AS216211 | 🇺🇸CYBERVERSE-BACKBONE CYBERVERSE LLC |
BGP Neighbours
(seen in AS paths)Upstreams (13)
Networks AS204921 hands its own prefixes to: transit providers, or peers at an exchange.
- AS18423RAID Networks5
- AS216211CYBERVERSE BACKBONE CYBERVERSE5
- AS11967HOP179 OU4
- AS51087BLING Network3
- AS199310QFLink XIN BING XIAN3
- AS20473The Constant Company2
- AS36530IDC Cube2
- AS204539AXIC Axivora Connect Axivora Connect2
- AS17408AboveNet Communications Taiwan1
- AS44324MOEDOVE1
- AS139317Ningbo Dahuamao Information Technology1
- AS204211LOCYAN NETWORK Shanghai Yingyun Network Technology1
- AS209554ISIF OU1
Downstreams (1)
Networks whose own prefixes AS204921 passes on: usually its customers.
- AS208223FOXO SHU HAO TUNG1
Other adjacent networks (1)
Adjacent to AS204921 in the transit part of AS paths: peers, providers or customers.
- AS140096JINX ., LIMITED1
ASPA
Published16 upstreams, 4 downstreams
Authorized Upstream Providers
AS6939AS11421AS11967AS17408AS18423AS36530AS40792AS44324AS51087AS140096AS199310AS204211AS204539AS204844AS206216AS216211
Expires 2026-10-28
Listed as Upstream Provider by
4 ASNsAbuse Contact
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
- How to run an ASPA checkVerify the upstream providers listed above
- IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/204921Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/204921" | jq