AS38648 F-REGI Co.,Ltd.

F-REGI - F-REGI Co.,Ltd. · registered in Japan

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4

Rank in Japan#521largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#30,356of 79,396 networks with IPv4

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

CountryJapan745 ASNs registered there

Open AS38648 in ASN lookup Look up an IP in this network (203.76.164.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

203.76.164.0/22

IPv6 prefixes

All 1 prefix.

2402:3b00::/32

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS51044#518 RHE Kazuki Yamaguchi1,024

AS4718#519 CKP - Cyber Kansai Project1,024

AS7500#520 M-ROOT-DNS - WIDE Project1,024

AS58645#522 marinet - Miyagi Cable TV Co.,Ltd1,024

AS59110#523 BPS - BPS Inc.1,024

AS63793#524 OPSBETTER - Japan OPS Better Co., Ltd.1,024

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