AS24348 — CNGI-BJ-IX2-AS-AP - CERNET2 IX at Tsinghua University

AS24348 announces 1 IPv4 prefixes covering 16,384 addresses and 1 IPv6 prefixes.

About this network

CNGI-BJ-IX2-AS-AP is the autonomous system for the CERNET2 Internet Exchange Point hosted at Tsinghua University.

What it's used for

• The address space is registered to the China Education and Research Network (CERNET), with netnames including CIS-CERNET, CERNET-CN, and BJR-CERNET.
• The AS announces 16,896 IPv4 addresses across 3 prefixes and 30 IPv6 prefixes, while maintaining only 7 observed neighbours, a ratio consistent with an internal educational network estate rather than a transit provider.

Notable

• Registrants for all announced prefixes align with the announcer, listing CERNET Helpdesk, China Education and Research Network (CERNET), and IRT-CERNET-AP.
• The inventory consists of a large /18 block alongside two /24 blocks, with the majority of the address space concentrated in the 58.206.192.0/18 range.

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

Announced prefixes

• 58.206.192.0/18
• 2402:7d80:240::/48

Upstream networks

• AS4538 China Education and Research Network Center
• AS23910 China Next Generation Internet CERNET2

Downstream networks

• AS45576 Tsinghua University
• AS9405 Test platform Service Center
• AS24302 CRIS-CERNET
• AS24310 Net-Glyph Data Center
• AS131490 CERNET Corporation

Adjacent networks

• AS23910 China Next Generation Internet CERNET2
• AS45576 Tsinghua University
• AS4538 China Education and Research Network Center
• AS9405 Test platform Service Center
• AS24302 CRIS-CERNET
• AS24310 Net-Glyph Data Center
• AS131490 CERNET Corporation

Routing security

• RPKI: 34 valid, 0 invalid and 13 not-found announcements; 44 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS20965:AS-FROM-TEIN-TO-GEANT, AS23911:AS-CUSTOMERS-V6, AS293:AS-FROM-SINGAREN-TO-ESNET, AS4538:AS-CUSTOMERS, AS4538:AS-CUSTOMERS-V6, AS58536:AS-PEERS, AS58536:AS-V6PEERS.