AS37918 NTT, Inc.

ECL-INET - NTT, Inc. · registered in Japan

IPv4 addresses69,37610 prefixes · 0.002% of announced IPv4

Rank in Japan#98largest network in JP by IPv4 space, of 724 · 0.04% of JP

Rank worldwide#2,476of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS37918 in ASN lookup Look up an IP in this network (129.60.0.1) All networks in Japan

IPv4 prefixes

All 10 prefixes, in address order.

129.60.0.0/16
192.68.235.0/24
192.68.236.0/22
192.68.240.0/21
192.68.248.0/28
192.68.248.16/28
192.68.248.32/27
192.68.248.64/26
192.68.248.128/25
192.68.249.0/24

IPv6 prefixes

All 1 prefix.

2001:df0:45::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS23820#95 RAKUTEN - Rakuten Group, Inc.69,632

AS17947#96 S-UTOPIA - SAKURA KCS Corporation.69,632

AS18271#97 EVOnet - Sojitz Tech Innovation Co., Ltd.69,632

AS7672#99 FITWEB - Hokuden Information System Service Co.,Ltd.68,352

AS55391#100 MF-NATIVE6-E - INTERNET MULTIFEED CO.67,584

AS55392#101 MF-NATIVE6-W - INTERNET MULTIFEED CO.67,584

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