AS2522 — PPP-EXP Japan Network Information Center

AS2522 announces 15 IPv4 prefixes covering 229,120 addresses and 0 IPv6 prefixes.

About this network

PPP-EXP is held by the Japan Network Information Center (JPNIC), Japan's national internet registry, and is used for its Pool Protection Project rather than by an end-user organization.

What it's used for

• Announcing otherwise-unused address space so that free blocks appear routed, a defensive measure against unauthorized (hijacked) announcements.

Notable

• Operated by the registry itself (a JPNIC/IIJ effort), so this is infrastructure tooling, not a commercial ISP, host, or corporate network.

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

Announced prefixes

• 61.122.16.0/22
• 103.210.108.0/22
• 133.112.0.0/16
• 150.41.0.0/16
• 158.200.0.0/16
• 192.47.97.0/24
• 192.50.235.0/24
• 202.210.56.0/22
• 203.178.8.0/24
• 203.179.64.0/20
• 210.134.208.0/20
• 211.1.0.0/19
• 218.231.16.0/20
• 219.101.112.0/20
• 220.213.240.0/20

Upstream networks

• AS2497 Internet Initiative Japan Inc.

Adjacent networks

• AS2497 Internet Initiative Japan Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 15 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS-IIJ, AS-IIJ6, AS2497:AS-IIJ, AS2497:AS-IIJ6.