AS2511 — CORE Nippon Telegraph and Telephone Corporation

AS2511 announces 5 IPv4 prefixes covering 41,728 addresses and 0 IPv6 prefixes.

About this network

This network (CORE) is registered to Nippon Telegraph and Telephone Corporation (NTT), Japan's largest telecommunications company.

What it's used for

• An NTT-operated network. The CORE handle and modest address footprint suggest operational/backbone use rather than a distinct consumer ISP brand.

Notable

• Operated by a major national telecom carrier. The low AS number reflects an early Japanese-internet allocation.

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

Announced prefixes

• 163.138.0.0/17
• 163.138.128.0/19
• 192.5.216.0/24
• 192.26.94.0/24
• 192.47.167.0/24

Upstream networks

• AS173 Nippon Telegraph and Telephone Corporation

Adjacent networks

• AS173 Nippon Telegraph and Telephone Corporation