AS9605 NTT DOCOMO, INC.

docomo - NTT DOCOMO, INC. · registered in Japan

IPv4 addresses2,536,448347 prefixes · 0.081% of announced IPv4

Rank in Japan#11largest network in JP by IPv4 space, of 724 · 1.57% of JP

Rank worldwide#164of 79,396 networks with IPv4

IPv61 x /32 (120,737 x /48)75 prefixes

CountryJapan745 ASNs registered there

Open AS9605 in ASN lookup Look up an IP in this network (1.66.20.1) All networks in Japan

IPv4 prefixes

All 347 prefixes, in address order.

1.66.20.0/22
1.66.24.0/21
1.66.32.0/22
1.66.36.0/24
1.66.68.0/22
1.66.90.0/24
1.66.92.0/24
1.66.96.0/19
1.66.128.0/17
1.67.0.0/17
1.67.128.0/18
1.67.192.0/19
1.67.224.0/21
1.67.232.0/22
1.67.236.0/23
1.67.240.0/20
1.72.0.0/16
1.73.0.0/18
1.73.64.0/21
1.73.72.0/22
1.73.76.0/23
1.73.128.0/18
1.73.192.0/19
1.73.224.0/20
1.73.244.0/23
1.73.248.0/24
1.74.0.0/17
1.74.192.0/23
1.74.196.0/22
1.74.200.0/21
1.74.208.0/20
1.74.240.0/20
1.75.0.0/21
1.75.8.0/22
1.75.12.0/23
1.75.14.0/24
1.75.16.0/20
1.75.64.0/18
1.75.128.0/18
1.75.196.0/22
1.75.202.0/23
1.75.204.0/22
1.75.208.0/20
1.75.224.0/19
1.76.4.0/22
1.76.8.0/21
1.76.16.0/20
1.76.32.0/19
1.76.64.0/21
1.76.72.0/22
1.76.80.0/21
1.76.148.0/22
1.76.152.0/21
1.76.160.0/19
1.76.192.0/19
1.76.224.0/22
1.77.0.0/16
1.78.0.0/18
1.78.64.0/19
1.78.96.0/22
1.78.127.0/24
1.78.128.0/17
1.79.2.0/23
1.79.4.0/24
1.79.6.0/23
1.79.8.0/21
1.79.16.0/20
1.79.32.0/19
1.79.66.0/23
1.79.68.0/22
1.79.72.0/21
1.79.80.0/20
1.79.96.0/19
1.79.128.0/19
1.79.160.0/20
1.79.176.0/21
1.79.216.0/21
1.79.224.0/19
27.228.0.0/15
27.230.0.0/19
27.230.32.0/21
27.230.41.0/24
27.230.42.0/23
27.230.44.0/22
27.230.48.0/22
27.230.52.0/24
27.230.56.0/21
27.230.64.0/20
27.230.80.0/21
27.230.88.0/22
27.230.94.0/23
27.230.96.0/19
27.230.128.0/19
27.230.160.0/22
27.230.172.0/24
27.230.174.0/23
27.230.187.0/24
27.230.192.0/18
27.231.0.0/16
49.96.0.0/18
49.96.64.0/19
49.96.96.0/20
49.96.112.0/22
49.96.116.0/24
49.96.120.0/21
49.96.128.0/20
49.96.147.0/24
49.96.148.0/24
49.96.150.0/23
49.96.152.0/23
49.96.160.0/19
49.96.192.0/21
49.96.216.0/21
49.96.224.0/20
49.96.242.0/23
49.96.244.0/24
49.96.246.0/23
49.96.248.0/21
49.97.0.0/24
49.97.5.0/24
49.97.6.0/23
49.97.8.0/21
49.97.20.0/22
49.97.24.0/22
49.97.28.0/23
49.97.30.0/24
49.97.35.0/24
49.97.36.0/23
49.97.38.0/24
49.97.43.0/24
49.97.44.0/23
49.97.46.0/24
49.97.51.0/24
49.97.68.0/22
49.97.72.0/21
49.97.86.0/24
49.97.88.0/22
49.97.96.0/21
49.97.104.0/23
49.97.106.0/24
49.97.107.0/24
49.97.108.0/22
49.97.112.0/20
49.97.193.0/24
49.97.196.0/23
49.97.200.0/21
49.97.208.0/20
49.98.0.0/20
49.98.16.0/21
49.98.24.0/23
49.98.28.0/23
49.98.32.0/21
49.98.40.0/22
49.98.48.0/21
49.98.60.0/22
49.98.64.0/18
49.98.128.0/17
49.99.0.0/16
49.100.160.0/19
49.100.192.0/18
49.101.0.0/16
49.102.128.0/22
49.102.132.0/23
49.102.134.0/24
49.102.148.0/22
49.102.152.0/21
49.102.160.0/23
49.102.164.0/23
49.102.168.0/21
49.102.176.0/20
49.103.16.0/20
49.103.32.0/19
49.103.128.0/17
49.104.0.0/17
49.104.128.0/18
49.104.192.0/19
49.104.224.0/20
49.104.240.0/21
49.104.248.0/22
49.104.252.0/24
49.104.254.0/24
49.105.10.0/23
49.105.12.0/22
49.105.16.0/20
49.105.32.0/20
49.105.48.0/22
49.105.52.0/23
49.105.54.0/24
49.105.64.0/18
49.105.128.0/18
49.105.192.0/19
49.105.224.0/22
49.106.0.0/19
49.106.32.0/22
49.106.36.0/23
49.106.38.0/24
49.106.80.0/20
49.106.96.0/19
49.106.128.0/19
49.106.160.0/21
49.106.168.0/22
49.106.172.0/24
49.106.174.0/23
49.106.176.0/20
49.106.192.0/22
49.106.200.0/21
49.106.208.0/20
49.106.224.0/22
49.106.228.0/23
49.106.231.0/24
49.106.234.0/24
49.106.236.0/22
49.106.240.0/20
49.107.0.0/17
49.107.128.0/18
49.108.0.0/17
49.108.128.0/18
49.108.192.0/19
49.108.224.0/23
49.108.238.0/23
49.108.240.0/23
49.109.0.0/18
49.109.64.0/20
49.109.80.0/21
49.109.96.0/19
49.109.128.0/18
49.109.192.0/19
49.109.224.0/20
49.109.240.0/22
49.110.0.0/18
49.110.124.0/22
49.110.128.0/17
49.111.0.0/16
61.195.208.0/20
110.158.0.0/17
110.158.128.0/23
110.158.131.0/24
110.158.132.0/22
110.158.136.0/21
110.158.144.0/20
110.158.160.0/20
110.158.188.0/22
110.158.192.0/18
110.160.0.0/16
110.161.0.0/17
110.161.128.0/18
110.161.192.0/22
110.161.204.0/22
110.161.208.0/20
110.161.224.0/19
110.162.96.0/19
110.162.128.0/17
110.163.6.0/23
110.163.8.0/22
110.163.12.0/23
110.163.18.0/23
110.163.20.0/23
110.163.24.0/21
110.163.39.0/24
110.163.40.0/23
110.163.42.0/24
110.163.58.0/24
110.163.128.0/20
110.163.144.0/22
110.163.216.0/21
110.163.224.0/22
110.163.251.0/24
146.99.0.0/16
146.160.0.0/16
148.67.0.0/16
148.68.0.0/16
157.112.0.0/18
158.199.32.0/19
160.249.0.0/18
160.249.64.0/20
160.249.80.0/21
160.249.88.0/22
160.249.92.0/24
160.249.94.0/23
160.249.112.0/20
160.249.128.0/17
183.72.0.0/16
183.73.0.0/20
183.73.16.0/21
183.73.24.0/22
183.73.28.0/23
183.73.32.0/19
183.73.64.0/18
183.73.128.0/17
183.74.0.0/21
183.74.8.0/23
183.74.112.0/20
183.74.128.0/17
183.75.0.0/17
183.75.192.0/21
183.75.200.0/24
183.75.206.0/23
183.75.230.0/23
183.75.232.0/22
183.75.236.0/24
211.14.64.0/21
211.14.72.0/22
211.14.78.0/23
211.14.80.0/22
211.14.88.0/21
211.14.96.0/21
211.14.112.0/20
219.114.128.0/19
219.114.160.0/20
219.114.176.0/21
219.114.184.0/23
219.114.186.0/24
219.114.188.0/22
219.122.64.0/20
220.159.21.0/24
220.159.22.0/23
220.159.28.0/24
220.159.30.0/23
220.159.32.0/20
220.159.53.0/24
220.159.54.0/23
220.159.56.0/24
220.159.60.0/22
220.159.64.0/18
220.159.128.0/18
220.159.207.0/24
220.159.208.0/20
220.159.224.0/22
220.159.230.0/23
220.159.232.0/23
220.159.236.0/22
220.159.250.0/23
220.210.0.0/20
220.210.16.0/22
220.210.20.0/23
220.210.22.0/24
220.210.25.0/24
220.210.26.0/24
220.210.28.0/22
220.210.32.0/19
220.210.64.0/20
220.210.80.0/22
220.210.88.0/21
220.210.96.0/21
220.210.104.0/23
220.210.108.0/22
220.210.112.0/20

IPv6 prefixes

All 75 prefixes.

240a:0:100::/40
240a:0:200::/40
240a:2:c90::/44
240a:2:ccc::/48
240a:2:d90::/44
240a:2:dcc::/48
240a:3:b90::/44
240a:3:bcc::/48
240a:3:bfe::/48
240a:14:e90::/44
240a:14:ecc::/48
240a:17:f90::/44
240a:17:fcc::/48
240a:40:4000::/34
240a:42:100::/48
240a:60:f000::/45
240a:60:f008::/46
240a:60:f00c::/48
240a:60:f00e::/48
240a:60:f010::/45
240a:60:f018::/46
240a:60:f01c::/48
240a:60:f01e::/48
240a:60:f030::/45
240a:60:f038::/46
240a:60:f03c::/47
240a:60:f03e::/48
240a:60:f050::/45
240a:60:f058::/46
240a:60:f05c::/47
240a:60:f05e::/48
240a:61::/37
240a:61:800::/38
240a:61:c00::/40
240a:61:e00::/48
240a:61:1000::/37
240a:61:1800::/38
240a:61:1c00::/40
240a:61:1e00::/48
240a:61:2000::/37
240a:61:2800::/38
240a:61:2c00::/40
240a:61:2e00::/48
240a:61:3000::/37
240a:61:3800::/38
240a:61:3c00::/40
240a:61:3e00::/48
240a:61:4000::/37
240a:61:4800::/38
240a:61:4c00::/40
240a:61:4e00::/48
240a:61:5000::/37
240a:61:5800::/38
240a:61:5c00::/40
240a:61:5e00::/48
240a:61:6000::/37
240a:61:6800::/38
240a:61:6c00::/40
240a:61:6e00::/48
240a:61:7000::/37
240a:61:7800::/38
240a:61:7c00::/40
240a:61:7e00::/48
240a:61:8000::/37
240a:61:8800::/38
240a:61:8c00::/40
240a:61:8e00::/48
240a:61:9000::/36
240a:61:a000::/36
240a:6b::/32
240a:70::/47
240a:70:2::/48
240a:70:8::/47
240a:7f:c000::/48
240a:7f:c003::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS2527#8 So-net - Sony Network Communications Inc.3,867,648

AS2518#9 BIGLOBE - BIGLOBE Inc.3,670,016

AS17511#10 OPTAGE - OPTAGE Inc.2,994,432

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

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

AS4725#14 ODN - SoftBank Corp.1,918,976

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