$ query “AS204921” --type=asn → 1 result(s)
AS204921 · YUNZHENG-NETWORK
zhenyun sun
AS204921 is run by zhenyun sun and is a hosting access provider, registered in the United Kingdom since 2025. The system announces 512 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in Hong Kong SAR China, with additional presence in Taiwan.
Basic Information
- Country
- 🇬🇧 United Kingdom
- Category
- Hosting
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- October 10, 2025
- Last Changed
- July 01, 2026
- Last Seen
- July 26, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 2 / 1
- IPv6 Prefixes (raw / aggregated)
- 12 / 4
- IPv4 Addresses
- 512
- Largest IPv4 Prefix
- /23 (512 addresses)
- Largest IPv6 Prefix
- /44
- Geolocated Countries
- 🇭🇰 Hong Kong SAR China (768 IPs), 🇹🇼 Taiwan (256 IPs)
- Prefix Changed
- June 26, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 6 upstreams providing transit
- Peers
- 40 networks exchanging traffic without transit
- Downstream Customers
- 1 downstream buying transit
- Unclassified
- 7 unclassified BGP neighbors
- Degree
- 54 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (6)
Prefix Lists
IPv4 Prefixes (2 total)
- 142.249.114.0/23 (512 addresses (/23 prefix))
IPv6 Prefixes (12 total)
- 2a0e:aa07:e250::/44
- 2a12:cb41:802::/47
- 2a12:cb41:801::/48
- 2a12:cb41:804::/48