AS208618 — CYY-AS Yangyu Chen

AS208618 announces 0 IPv4 prefixes covering 0 addresses and 2 IPv6 prefixes.

About this network

The AS handle CYY-AS is held by Yangyu Chen.

What it's used for

• The space carries IPv6 traffic, with announced prefixes including 2406:840:f990::/47, 2406:840:f992::/47, 2406:840:f994::/46, 2406:840:f998::/45, and 2a0e:aa06:470::/44.
• The network announces 5 IPv6 prefixes and 0 IPv4 addresses, with 3 observed neighbours, indicating a small-scale research or experimental network rather than a commercial transit or access provider.
• Traffic from this AS consists of research and experimental data, associated with the operator's academic and technical projects.

Notable

• The registry holder is Yangyu Chen, consistent with the PeeringDB description of the network as an educational and research initiative.
• The address inventory is entirely IPv6, with no IPv4 space announced, reflecting a modern, IPv6-first experimental setup.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 2406:840:f990::/44
• 2a0e:aa06:470::/44

Upstream networks

• AS6939 Hurricane Electric LLC
• AS212895 Johannes Ernst
• AS7720 Skywolf Technology LLC

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS212895 Johannes Ernst
• AS7720 Skywolf Technology LLC

Routing security

• RPKI: 8 valid, 0 invalid and 0 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 63% of announcements registered; 32 route objects.
• Listed in as-sets: AS-HURRICANEV6, AS-HYTRON, AS-HYTRON, AS-HYTRONNETWORK, AS-HYTRONNETWORK, AS-RETN-ACTUAL-V6, AS-SKYWOLF-HK-CUSTOMER, AS-TIANHAI, AS-TIANHAI, AS-TIANHAI, AS-VM-JE-CUS, AS17433:AS-HYTRON, AS17433:AS-HYTRON, AS202662:AS-HYTRON, AS20473:AS-VULTR, AS216449:AS-SKYWOLF-HK-CUSTOMER, AS4842:AS-DOWNSTREAMS, AS52025:AS-DOWNSTREAMS-AMSTERDAM, AS52025:AS-DOWNSTREAMS-ASHBURN, AS52025:AS-DOWNSTREAMS-AUCKLAND, AS52025:AS-DOWNSTREAMS-FRANKFURT, AS52025:AS-DOWNSTREAMS-FREMONT, AS52025:AS-DOWNSTREAMS-KANSASCITY, AS52025:AS-DOWNSTREAMS-NEWARK, AS52025:AS-DOWNSTREAMS-SINGAPORE.