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Autonomous System details for AS204921

AS204921
zhenyun sun • as204921.net

AS204921 — zhenyun sun

AS Name
YunZheng-Network
Country
United Kingdom (GB)
Website
Number of IPv4
512
Number of IPv6
3.26 × 1025
ASN type
Education
Status
Allocated
Registry
RIPE
Allocated
October 10, 2025
Last updated
May 29, 2026

IP Ranges

2 IPv4 prefixes, 12 IPv6 prefixes
Prefix Company Number of IPs
142.249.114.0/24 ZHENYUN SUN RESEARCH NETWORK 256
142.249.115.0/24 ZHENYUN SUN RESEARCH NETWORK 256
2a0e:aa07:e250::/44 zhenyun sun 1.93 × 1025
2a0e:aa07:e251::/48 zhenyun sun 1.21 × 1024
2a0e:aa07:e252::/48 zhenyun sun 1.21 × 1024
2a0e:aa07:e253::/48 zhenyun sun 1.21 × 1024
2a0e:aa07:e254::/48 zhenyun sun 1.21 × 1024
2a0e:aa07:e256::/48 zhenyun sun 1.21 × 1024
2a0e:aa07:e258::/48 zhenyun sun 1.21 × 1024
2a0e:aa07:e259::/48 zhenyun sun 1.21 × 1024
2a12:cb41:801::/48 zhenyun sun 1.21 × 1024
2a12:cb41:802::/48 zhenyun sun 1.21 × 1024
2a12:cb41:803::/48 zhenyun sun 1.21 × 1024
2a12:cb41:804::/48 zhenyun sun 1.21 × 1024

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS204921

19 peers

AS204921 peers with these other Autonomous Systems.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS204921

5 upstreams

AS204921 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS204921 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS204921

1 downstreams

AS204921 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

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