AS23911 — CNGI-BJIX-AS-AP China Next Generation Internet Beijing IX

AS23911 announces 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefixes.

About this network

CNGI-BJIX-AS-AP is operated by China Next Generation Internet Beijing IX.

What it's used for

• The address space carries CERNET infrastructure, with both IPv4 prefixes registered under the netname CERNET-CN-PI and registrant IRT-CERNET-AP.
• The AS announces 512 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 20 observed neighbours. This ratio of limited address space to a moderate number of peering partners suggests a transit or interconnection role within the Chinese education network rather than a large-scale access provider.

Notable

• The registrants for the announced IPv4 prefixes (IRT-CERNET-AP) align with the CERNET identity implied by the AS handle and netnames, indicating consistent ownership of the address space.
• The inventory consists of two contiguous /24 blocks in the 210.25.0.0/16 range and a single /32 IPv6 prefix, representing a small, focused allocation typical of a specific network segment or exchange point.

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

Announced prefixes

• 210.25.187.0/24
• 210.25.189.0/24
• 2001:252::/32

Upstream networks

• AS24489 Trans-Eurasia Information Network (TEIN2) - North
• AS7660 Asia Pacific Advanced Network - Japan
• AS4538 China Education and Research Network Center
• AS20965 GEANT Vereniging

Downstream networks

• AS4538 China Education and Research Network Center
• AS23910 China Next Generation Internet CERNET2
• AS24489 Trans-Eurasia Information Network (TEIN2) - North
• AS45110 Beijing Tian Wei Xin Tong technology corp. limited.
• AS59265 China telecom – China Next Generation Internet
• AS38255 China Education and Research Network (CERNET)
• AS9401 National Library of China

Adjacent networks

• AS38255 China Education and Research Network (CERNET)
• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS24489 Trans-Eurasia Information Network (TEIN2) - North
• AS23910 China Next Generation Internet CERNET2
• AS4538 China Education and Research Network Center
• AS7660 Asia Pacific Advanced Network - Japan
• AS1273 IDDQD-AS
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS293 ESnet
• AS3491 PCCW Global (HK) Ltd.
• AS45110 Beijing Tian Wei Xin Tong technology corp. limited.
• AS59265 China telecom – China Next Generation Internet
• AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
• AS9401 National Library of China
• AS20965 GEANT Vereniging
• AS11537 Internet2

Internet exchanges

• Hong Kong Internet Exchange — Hong Kong, China