AS4725 SoftBank Corp.

ODN - SoftBank Corp. · registered in Japan

IPv4 addresses1,918,976165 prefixes · 0.061% of announced IPv4

Rank in Japan#14largest network in JP by IPv4 space, of 724 · 1.19% of JP

Rank worldwide#202of 79,396 networks with IPv4

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

CountryJapan745 ASNs registered there

Open AS4725 in ASN lookup Look up an IP in this network (1.5.0.1) All networks in Japan

IPv4 prefixes

All 165 prefixes, in address order.

1.5.0.0/16
39.2.128.0/17
39.3.0.0/16
61.116.0.0/16
61.123.0.0/16
61.196.0.0/16
61.201.0.0/17
61.201.136.0/21
61.201.144.0/21
61.201.160.0/19
61.201.192.0/18
61.209.0.0/16
143.90.0.0/16
150.3.96.0/24
157.2.8.0/22
157.2.126.0/24
157.78.0.0/16
165.76.0.0/17
182.158.64.0/19
182.158.128.0/19
182.158.224.0/20
182.159.16.0/20
182.159.32.0/19
182.159.64.0/18
182.159.144.0/20
182.159.160.0/19
182.159.192.0/20
198.36.75.0/24
202.19.20.0/23
202.26.200.0/21
202.33.8.0/21
202.33.16.0/22
202.33.20.0/22
202.33.24.0/21
202.33.32.0/19
202.33.68.0/22
202.33.72.0/21
202.33.80.0/21
202.33.88.0/22
202.33.96.0/22
202.33.100.0/23
202.33.112.0/20
202.33.128.0/22
202.33.132.0/23
202.33.134.0/24
202.33.135.0/24
202.33.136.0/21
202.33.144.0/20
202.33.160.0/21
202.33.168.0/21
202.33.176.0/20
202.33.192.0/21
202.33.208.0/21
202.33.224.0/22
202.33.228.0/22
202.33.232.0/21
202.33.240.0/20
202.48.208.0/24
202.48.210.0/23
202.48.212.0/23
202.48.214.0/24
202.48.216.0/23
202.126.224.0/20
202.174.192.0/19
202.179.207.0/24
202.211.128.0/22
202.211.156.0/22
202.211.192.0/22
202.211.200.0/21
202.211.212.0/22
202.211.216.0/21
202.211.240.0/21
202.217.128.0/17
202.218.14.0/24
202.227.32.0/20
202.227.48.0/22
202.227.56.0/22
202.230.19.0/24
202.230.59.0/24
202.234.128.0/24
202.234.131.0/24
202.234.136.0/24
202.234.145.0/24
202.234.146.0/24
202.234.152.0/24
202.234.154.0/24
202.240.192.0/19
202.242.240.0/23
202.255.48.0/22
203.139.0.0/19
203.139.32.0/21
203.139.40.0/24
203.139.41.0/24
203.139.42.0/23
203.139.44.0/22
203.139.48.0/20
203.139.64.0/19
203.183.153.0/24
203.183.154.0/23
210.129.185.0/24
210.134.64.0/21
210.134.72.0/22
210.134.76.0/24
210.134.77.0/24
210.134.78.0/23
210.134.80.0/20
210.140.32.0/23
210.142.160.0/19
210.146.0.0/18
210.151.0.0/18
210.156.96.0/20
210.158.207.0/24
210.169.128.0/18
210.169.192.0/20
210.169.208.0/22
210.169.212.0/24
210.169.213.0/24
210.169.214.0/23
210.169.216.0/21
210.169.224.0/21
210.169.232.0/21
210.169.240.0/20
210.171.123.0/24
210.174.148.0/22
210.174.160.0/20
210.174.176.0/22
210.174.184.0/21
210.174.196.0/22
210.174.200.0/21
210.174.208.0/22
210.175.0.0/17
210.188.0.0/17
210.189.249.0/24
210.197.0.0/16
210.228.128.0/17
210.231.0.0/18
210.231.64.0/19
210.231.96.0/21
210.231.104.0/23
210.231.106.0/24
210.231.107.0/24
210.231.108.0/22
210.231.112.0/20
210.235.6.0/23
210.236.234.0/23
210.237.128.0/17
210.239.72.0/23
210.252.103.0/24
210.252.128.0/17
210.254.0.0/18
211.3.0.0/16
211.8.0.0/16
211.121.0.0/16
211.127.0.0/16
211.131.0.0/16
218.40.192.0/20
218.46.0.0/16
218.216.80.0/20
218.218.0.0/17
218.218.128.0/18
218.218.192.0/19
218.218.232.0/21
218.218.240.0/20
219.66.0.0/15
220.212.0.0/16

IPv6 prefixes

All 1 prefix.

2001:278::/32

Other ASNs named SoftBank Corp.

4 other networks use the same organisation name; together with AS4725 they announce 40,377,344 IPv4 addresses.

ASNNameIPv4 addresses

AS17676GIGAINFRA - SoftBank Corp. JP38,445,056

AS17505SBmobile - SoftBank Corp. JP6,656

AS146969SBT-SC - SoftBank Corp. JP6,400

AS18069SOFTBANK - SoftBank Corp. JP256

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS9605#11 docomo - NTT DOCOMO, INC.2,536,448

AS2514#12 InfoSphere - NTT PC Communications, Inc.2,078,976

AS10013#13 FBDC - FreeBit Co.,Ltd.1,944,064

AS9595#15 XEPHION - NTT-ME Corporation1,513,472

AS2510#16 INFOWEB - FUJITSU LIMITED1,509,376

AS18126#17 CTCX - Chubu Telecommunications Company, Inc.1,505,536

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