AS59125 FAMILY NET JAPAN INCORPORATED

CYBERHOME1 - FAMILY NET JAPAN INCORPORATED · registered in Japan

IPv4 addresses41,9847 prefixes · 0.001% of announced IPv4

Rank in Japan#189largest network in JP by IPv4 space, of 724 · 0.03% of JP

Rank worldwide#4,205of 79,396 networks with IPv4

IPv64 x /32 (327,679 x /48)17 prefixes

CountryJapan745 ASNs registered there

Open AS59125 in ASN lookup Look up an IP in this network (1.21.96.1) All networks in Japan

IPv4 prefixes

All 7 prefixes, in address order.

1.21.96.0/20
1.21.128.0/20
103.246.80.0/22
150.91.160.0/19
160.237.64.0/19
160.237.128.0/19
218.223.160.0/19

IPv6 prefixes

All 17 prefixes.

2400:a140::/33
2400:a140:8000::/34
2400:a140:c000::/35
2400:a140:e000::/36
2400:a140:f000::/37
2400:a140:f800::/38
2400:a140:fc00::/39
2400:a140:fe00::/40
2400:a140:ff00::/41
2400:a140:ff80::/42
2400:a140:ffc0::/43
2400:a140:ffe0::/44
2400:a140:fff0::/45
2400:a140:fff8::/46
2400:a140:fffc::/47
2400:a140:fffe::/48
2401:4d40::/30

Other ASNs named FAMILY NET JAPAN INCORPORATED

1 other network uses the same organisation name; together with AS59125 they announce 63,232 IPv4 addresses.

ASNNameIPv4 addresses

AS131925CYBERHOME2 - FAMILY NET JAPAN INCORPORATED JP21,248

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS9378#186 CABLENET - JCOM Co., Ltd.45,056

AS23785#187 SUNFIELD - SUN FIELD INTERNET LIMITED45,056

AS18136#188 CTA - JCOM Co., Ltd.43,008

AS2511#190 CORE - Nippon Telegraph and Telephone Corporation41,728

AS7676#191 TAM - TAM Co., Ltd.39,680

AS7690#192 MIRAI - Mirai Communication Network Inc.38,912

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