AS2506 NTT business Solutions corporation

SuperCSI - NTT business Solutions corporation · registered in Japan

IPv4 addresses214,27214 prefixes · 0.007% of announced IPv4

Rank in Japan#42largest network in JP by IPv4 space, of 724 · 0.13% of JP

Rank worldwide#1,029of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryJapan745 ASNs registered there

Open AS2506 in ASN lookup Look up an IP in this network (133.41.0.1) All networks in Japan

IPv4 prefixes

All 14 prefixes, in address order.

133.41.0.0/16
150.19.0.0/16
165.242.0.0/16
202.15.112.0/22
202.245.144.0/24
202.249.192.0/20
202.249.208.0/24
202.249.209.0/24
202.249.210.0/23
202.249.212.0/23
202.249.214.0/24
202.249.215.0/24
202.249.216.0/21
202.249.224.0/19

IPv6 prefixes

All 1 prefix.

2001:44a0::/32

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS9351#39 ZLAN - ZTV CO.,LTD249,856

AS4673#40 INTERVIA - NTT DATA CORPORATION241,664

AS2522#41 PPP-EXP - Japan Network Information Center229,120

AS7687#43 D-CRUISENET - TOYOTA SYSTEMS CORPORATION200,960

AS2501#44 UTnet - The University of Tokyo200,704

AS4686#45 BEKKOAME - BEKKOAME INTERNET INC.200,448

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources

AS2506 NTT business Solutions corporation

IPv4 prefixes

IPv6 prefixes

Other ASNs named NTT business Solutions corporation

Similar-sized networks in Japan