asn.dev

Address space

AS2907 SINET-AS Research Organization of Information and Systems, National Institute of Informatics

IPv4 prefixes 573 8.64M addresses
IPv6 prefixes 2
Most common size /24 IPv4
Flagged 20

Shape

Prefix sizes

IPv4
/15
/15: 16
16
/16
/16: 79
79
/17
/17: 12
12
/18
/18: 20
20
/19
/19: 24
24
/20
/20: 43
43
/21
/21: 52
52
/22
/22: 79
79
/23
/23: 91
91
/24
/24: 137
137
/25
/25: 5
5
/26
/26: 5
5
/27
/27: 2
2
/28
/28: 3
3
/29
/29: 1
1
/30
/30: 1
1
/31
/31: 1
1
/32
/32: 2
2

How this network carves its IPv4 space. A wall of /24s usually means many small customer assignments or fine-grained traffic engineering; a few short prefixes means large contiguous allocations announced whole.

Shape

Prefix sizes

IPv6
/32
/32: 2
2

Geography

Where the space lands

CountryNamePrefixes
JPJapan575

Review

Flagged prefixes

20 of 575
PrefixFamilyAddressesCountryFlags
192.42.103.0/26IPv464JPToo specific
192.153.95.0/25IPv4128JPToo specific
192.153.95.128/26IPv464JPToo specific
192.153.95.192/26IPv464JPToo specific
202.220.21.0/25IPv4128JPToo specific
202.220.21.128/26IPv464JPToo specific
202.220.21.192/27IPv432JPToo specific
202.220.21.224/28IPv416JPToo specific
202.220.21.240/29IPv48JPToo specific
202.220.21.248/31IPv42JPToo specific
202.220.21.250/32IPv41JPToo specific
202.220.21.251/32IPv41JPToo specific
202.220.21.252/30IPv44JPToo specific
202.236.107.0/26IPv464JPToo specific
202.236.107.64/27IPv432JPToo specific
202.236.107.96/28IPv416JPToo specific
202.236.107.112/28IPv416JPToo specific
202.236.107.128/25IPv4128JPToo specific
202.246.132.0/25IPv4128JPToo specific
202.246.132.128/25IPv4128JPToo specific

A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.

Inventory

All prefixes

showing 400 of 575
PrefixFamilyAddressesCountryFlags
103.164.74.0/23IPv4512JP
103.164.166.0/23IPv4512JP
103.164.168.0/23IPv4512JP
103.180.128.0/23IPv4512JP
130.34.0.0/16IPv465,536JP
130.153.0.0/16IPv465,536JP
131.206.0.0/16IPv465,536JP
133.7.0.0/16IPv465,536JP
133.8.0.0/16IPv465,536JP
133.10.0.0/16IPv465,536JP
133.12.0.0/16IPv465,536JP
133.14.0.0/15IPv4131,072JP
133.16.0.0/16IPv465,536JP
133.17.0.0/21IPv42,048JP
133.17.8.0/23IPv4512JP
133.17.10.0/24IPv4256JP
133.17.11.0/24IPv4256JP
133.17.12.0/22IPv41,024JP
133.17.16.0/20IPv44,096JP
133.17.32.0/19IPv48,192JP
133.17.64.0/18IPv416,384JP
133.17.128.0/17IPv432,768JP
133.20.0.0/15IPv4131,072JP
133.23.0.0/16IPv465,536JP
133.29.0.0/16IPv465,536JP
133.30.0.0/16IPv465,536JP
133.32.100.0/22IPv41,024JP
133.34.0.0/15IPv4131,072JP
133.37.0.0/16IPv465,536JP
133.38.0.0/15IPv4131,072JP
133.44.0.0/15IPv4131,072JP
133.46.0.0/16IPv465,536JP
133.48.0.0/15IPv4131,072JP
133.52.0.0/16IPv465,536JP
133.54.0.0/18IPv416,384JP
133.54.64.0/21IPv42,048JP
133.54.76.0/22IPv41,024JP
133.54.80.0/20IPv44,096JP
133.54.96.0/19IPv48,192JP
133.54.128.0/17IPv432,768JP
133.55.0.0/16IPv465,536JP
133.57.0.0/16IPv465,536JP
133.58.0.0/16IPv465,536JP
133.60.0.0/16IPv465,536JP
133.62.0.0/15IPv4131,072JP
133.68.0.0/16IPv465,536JP
133.72.0.0/15IPv4131,072JP
133.74.192.0/18IPv416,384JP
133.77.0.0/16IPv465,536JP
133.78.0.0/16IPv465,536JP
133.81.0.0/16IPv465,536JP
133.82.0.0/15IPv4131,072JP
133.84.0.0/15IPv4131,072JP
133.86.0.0/17IPv432,768JP
133.86.128.0/18IPv416,384JP
133.86.192.0/19IPv48,192JP
133.86.224.0/20IPv44,096JP
133.86.240.0/21IPv42,048JP
133.86.248.0/24IPv4256JP
133.86.249.0/24IPv4256JP
133.86.250.0/24IPv4256JP
133.86.251.0/24IPv4256JP
133.86.252.0/22IPv41,024JP
133.88.224.0/23IPv4512JP
133.88.226.0/24IPv4256JP
133.94.0.0/15IPv4131,072JP
133.96.0.0/16IPv465,536JP
133.98.0.0/15IPv4131,072JP
133.102.0.0/15IPv4131,072JP
133.104.0.0/16IPv465,536JP
133.106.0.0/21IPv42,048JP
133.187.0.0/16IPv465,536JP
133.220.0.0/16IPv465,536JP
134.160.186.0/23IPv4512JP
134.160.188.0/23IPv4512JP
136.187.0.0/16IPv465,536JP
144.213.0.0/16IPv465,536JP
147.157.0.0/18IPv416,384JP
147.157.64.0/20IPv44,096JP
147.157.80.0/22IPv41,024JP
147.157.84.0/23IPv4512JP
147.157.86.0/23IPv4512JP
147.157.88.0/21IPv42,048JP
147.157.96.0/19IPv48,192JP
147.157.128.0/17IPv432,768JP
150.7.0.0/20IPv44,096JP
150.7.16.0/21IPv42,048JP
150.7.24.0/22IPv41,024JP
150.7.28.0/24IPv4256JP
150.7.29.0/24IPv4256JP
150.7.30.0/23IPv4512JP
150.7.32.0/19IPv48,192JP
150.7.64.0/18IPv416,384JP
150.7.128.0/18IPv416,384JP
150.7.192.0/19IPv48,192JP
150.7.224.0/20IPv44,096JP
150.7.240.0/21IPv42,048JP
150.7.248.0/23IPv4512JP
150.7.250.0/24IPv4256JP
150.7.251.0/24IPv4256JP
150.7.252.0/22IPv41,024JP
150.9.254.0/23IPv4512JP
150.12.0.0/16IPv465,536JP
150.15.0.0/16IPv465,536JP
150.22.0.0/22IPv41,024JP
150.42.0.0/15IPv4131,072JP
150.46.0.0/16IPv465,536JP
150.54.0.0/16IPv465,536JP
150.59.0.0/16IPv465,536JP
150.69.0.0/16IPv465,536JP
150.83.0.0/16IPv465,536JP
150.84.0.0/16IPv465,536JP
150.86.0.0/16IPv465,536JP
150.89.0.0/17IPv432,768JP
150.89.128.0/19IPv48,192JP
150.89.160.0/20IPv44,096JP
150.89.176.0/20IPv44,096JP
150.89.192.0/18IPv416,384JP
150.97.0.0/16IPv465,536JP
150.99.0.0/16IPv465,536JP
150.100.0.0/16IPv465,536JP
157.1.0.0/16IPv465,536JP
157.6.0.0/16IPv465,536JP
157.7.0.0/19IPv48,192JP
157.13.0.0/17IPv432,768JP
157.13.128.0/23IPv4512JP
157.13.130.0/23IPv4512JP
157.13.132.0/22IPv41,024JP
157.13.136.0/21IPv42,048JP
157.13.144.0/20IPv44,096JP
157.13.160.0/19IPv48,192JP
157.13.192.0/18IPv416,384JP
157.16.0.0/16IPv465,536JP
157.17.0.0/19IPv48,192JP
157.19.0.0/16IPv465,536JP
157.63.0.0/16IPv465,536JP
157.76.0.0/16IPv465,536JP
157.80.0.0/16IPv465,536JP
157.102.0.0/16IPv465,536JP
157.105.0.0/16IPv465,536JP
157.111.0.0/20IPv44,096JP
157.111.16.0/24IPv4256JP
157.111.17.0/24IPv4256JP
157.111.18.0/23IPv4512JP
157.111.20.0/22IPv41,024JP
157.111.24.0/21IPv42,048JP
157.111.32.0/19IPv48,192JP
157.111.64.0/18IPv416,384JP
157.111.128.0/17IPv432,768JP
157.114.0.0/16IPv465,536JP
158.203.0.0/16IPv465,536JP
158.208.0.0/16IPv465,536JP
158.210.0.0/16IPv465,536JP
158.215.0.0/16IPv465,536JP
160.11.0.0/16IPv465,536JP
160.12.0.0/16IPv465,536JP
160.15.0.0/16IPv465,536JP
160.18.2.0/24IPv4256JP
160.18.100.0/24IPv4256JP
160.18.128.0/24IPv4256JP
160.18.136.0/23IPv4512JP
160.18.148.0/23IPv4512JP
160.18.216.0/23IPv4512JP
160.18.220.0/23IPv4512JP
160.18.224.0/23IPv4512JP
160.28.0.0/15IPv4131,072JP
160.190.0.0/16IPv465,536JP
160.193.0.0/16IPv465,536JP
160.194.0.0/16IPv465,536JP
160.198.0.0/16IPv465,536JP
160.202.0.0/21IPv42,048JP
160.204.0.0/16IPv465,536JP
160.237.0.0/18IPv416,384JP
160.237.192.0/18IPv416,384JP
160.238.1.0/24IPv4256JP
160.238.2.0/23IPv4512JP
160.238.4.0/22IPv41,024JP
160.238.8.0/23IPv4512JP
160.238.10.0/24IPv4256JP
160.238.20.0/24IPv4256JP
160.238.30.0/24IPv4256JP
160.238.32.0/24IPv4256JP
160.238.40.0/24IPv4256JP
160.238.51.0/24IPv4256JP
160.238.56.0/24IPv4256JP
160.238.62.0/24IPv4256JP
160.238.100.0/24IPv4256JP
160.245.112.0/24IPv4256JP
160.247.0.0/16IPv465,536JP
160.252.0.0/16IPv465,536JP
163.42.0.0/16IPv465,536JP
163.47.1.0/24IPv4256JP
163.47.2.0/23IPv4512JP
163.51.0.0/16IPv465,536JP
163.54.0.0/16IPv465,536JP
163.130.0.0/16IPv465,536JP
163.134.0.0/16IPv465,536JP
163.136.0.0/16IPv465,536JP
163.143.0.0/16IPv465,536JP
163.145.0.0/16IPv465,536JP
163.148.0.0/16IPv465,536JP
163.209.0.0/16IPv465,536JP
163.212.0.0/20IPv44,096JP
163.212.16.0/21IPv42,048JP
163.212.24.0/22IPv41,024JP
163.212.28.0/23IPv4512JP
163.212.30.0/23IPv4512JP
163.212.32.0/19IPv48,192JP
163.212.64.0/18IPv416,384JP
163.212.128.0/17IPv432,768JP
163.214.0.0/15IPv4131,072JP
163.220.0.0/17IPv432,768JP
163.220.128.0/19IPv48,192JP
163.220.176.0/20IPv44,096JP
163.225.0.0/16IPv465,536JP
163.226.0.0/16IPv465,536JP
164.161.0.0/16IPv465,536JP
165.93.0.0/16IPv465,536JP
192.31.121.0/24IPv4256JP
192.42.103.0/26IPv464JPToo specific
192.47.1.0/24IPv4256JP
192.47.2.0/23IPv4512JP
192.47.16.0/22IPv41,024JP
192.47.204.0/23IPv4512JP
192.50.28.0/24IPv4256JP
192.50.30.0/23IPv4512JP
192.50.42.0/24IPv4256JP
192.50.57.0/24IPv4256JP
192.50.69.0/24IPv4256JP
192.50.70.0/23IPv4512JP
192.50.72.0/24IPv4256JP
192.50.102.0/23IPv4512JP
192.50.106.0/23IPv4512JP
192.50.108.0/24IPv4256JP
192.50.192.0/23IPv4512JP
192.50.210.0/23IPv4512JP
192.50.212.0/24IPv4256JP
192.51.168.0/22IPv41,024JP
192.51.194.0/23IPv4512JP
192.58.9.0/24IPv4256JP
192.58.10.0/23IPv4512JP
192.58.12.0/22IPv41,024JP
192.58.16.0/23IPv4512JP
192.58.18.0/24IPv4256JP
192.153.95.0/25IPv4128JPToo specific
192.153.95.128/26IPv464JPToo specific
192.153.95.192/26IPv464JPToo specific
192.153.96.0/21IPv42,048JP
192.153.104.0/24IPv4256JP
192.156.145.0/24IPv4256JP
192.156.146.0/23IPv4512JP
192.156.148.0/23IPv4512JP
192.156.151.0/24IPv4256JP
192.156.158.0/24IPv4256JP
192.172.236.0/24IPv4256JP
192.174.128.0/17IPv432,768JP
192.188.73.0/24IPv4256JP
192.188.74.0/24IPv4256JP
192.218.1.0/24IPv4256JP
192.218.92.0/22IPv41,024JP
192.218.112.0/21IPv42,048JP
192.218.160.0/20IPv44,096JP
192.218.240.0/21IPv42,048JP
192.244.20.0/23IPv4512JP
192.244.78.0/23IPv4512JP
192.244.80.0/20IPv44,096JP
192.244.144.0/20IPv44,096JP
192.244.196.0/22IPv41,024JP
192.244.208.0/20IPv44,096JP
192.244.228.0/22IPv41,024JP
192.244.254.0/24IPv4256JP
202.11.0.0/21IPv42,048JP
202.11.8.0/22IPv41,024JP
202.11.96.0/20IPv44,096JP
202.11.138.0/24IPv4256JP
202.11.166.0/23IPv4512JP
202.11.212.0/24IPv4256JP
202.11.216.0/22IPv41,024JP
202.13.0.0/22IPv41,024JP
202.13.4.0/23IPv4512JP
202.13.8.0/21IPv42,048JP
202.13.16.0/21IPv42,048JP
202.13.60.0/24IPv4256JP
202.13.82.0/23IPv4512JP
202.13.87.0/24IPv4256JP
202.15.16.0/20IPv44,096JP
202.15.106.0/23IPv4512JP
202.15.110.0/24IPv4256JP
202.16.122.0/23IPv4512JP
202.16.124.0/23IPv4512JP
202.16.128.0/20IPv44,096JP
202.16.208.0/20IPv44,096JP
202.16.224.0/24IPv4256JP
202.17.104.0/21IPv42,048JP
202.17.120.0/23IPv4512JP
202.17.171.0/24IPv4256JP
202.17.182.0/24IPv4256JP
202.17.184.0/22IPv41,024JP
202.17.200.0/21IPv42,048JP
202.17.208.0/22IPv41,024JP
202.17.254.0/24IPv4256JP
202.18.32.0/19IPv48,192JP
202.18.160.0/21IPv42,048JP
202.18.168.0/22IPv41,024JP
202.18.172.0/22IPv41,024JP
202.18.182.0/24IPv4256JP
202.18.184.0/21IPv42,048JP
202.18.254.0/24IPv4256JP
202.19.104.0/23IPv4512JP
202.19.136.0/21IPv42,048JP
202.19.144.0/21IPv42,048JP
202.19.168.0/21IPv42,048JP
202.19.179.0/24IPv4256JP
202.23.64.0/22IPv41,024JP
202.23.72.0/21IPv42,048JP
202.23.86.0/24IPv4256JP
202.23.192.0/21IPv42,048JP
202.23.247.0/24IPv4256JP
202.24.52.0/24IPv4256JP
202.24.80.0/21IPv42,048JP
202.24.92.0/22IPv41,024JP
202.24.140.0/22IPv41,024JP
202.24.144.0/21IPv42,048JP
202.24.160.0/21IPv42,048JP
202.24.240.0/21IPv42,048JP
202.25.68.0/22IPv41,024JP
202.25.80.0/23IPv4512JP
202.25.86.0/23IPv4512JP
202.25.99.0/24IPv4256JP
202.25.113.0/24IPv4256JP
202.25.155.0/24IPv4256JP
202.25.156.0/24IPv4256JP
202.25.224.0/20IPv44,096JP
202.26.64.0/19IPv48,192JP
202.26.139.0/24IPv4256JP
202.26.144.0/20IPv44,096JP
202.26.160.0/20IPv44,096JP
202.26.188.0/22IPv41,024JP
202.26.196.0/22IPv41,024JP
202.26.224.0/24IPv4256JP
202.26.248.0/23IPv4512JP
202.34.192.0/20IPv44,096JP
202.34.232.0/21IPv42,048JP
202.34.242.0/23IPv4512JP
202.34.246.0/23IPv4512JP
202.35.192.0/21IPv42,048JP
202.35.200.0/21IPv42,048JP
202.35.208.0/20IPv44,096JP
202.35.224.0/24IPv4256JP
202.35.226.0/23IPv4512JP
202.35.228.0/24IPv4256JP
202.35.248.0/22IPv41,024JP
202.48.48.0/22IPv41,024JP
202.48.112.0/21IPv42,048JP
202.48.128.0/23IPv4512JP
202.48.160.0/22IPv41,024JP
202.48.228.0/22IPv41,024JP
202.145.16.0/22IPv41,024JP
202.145.24.0/23IPv4512JP
202.175.144.0/20IPv44,096JP
202.208.8.0/23IPv4512JP
202.208.25.0/24IPv4256JP
202.209.0.0/16IPv465,536JP
202.210.0.0/22IPv41,024JP
202.211.0.0/19IPv48,192JP
202.213.0.0/22IPv41,024JP
202.213.24.0/23IPv4512JP
202.213.160.0/20IPv44,096JP
202.216.78.0/24IPv4256JP
202.220.0.0/22IPv41,024JP
202.220.17.0/24IPv4256JP
202.220.21.0/25IPv4128JPToo specific
202.220.21.128/26IPv464JPToo specific
202.220.21.192/27IPv432JPToo specific
202.220.21.224/28IPv416JPToo specific
202.220.21.240/29IPv48JPToo specific
202.220.21.248/31IPv42JPToo specific
202.220.21.250/32IPv41JPToo specific
202.220.21.251/32IPv41JPToo specific
202.220.21.252/30IPv44JPToo specific
202.220.56.0/22IPv41,024JP
202.220.62.0/23IPv4512JP
202.220.64.0/22IPv41,024JP
202.220.72.0/22IPv41,024JP
202.220.80.0/24IPv4256JP
202.220.104.0/23IPv4512JP
202.220.116.0/23IPv4512JP
202.220.118.0/24IPv4256JP
202.220.124.0/22IPv41,024JP
202.223.128.0/18IPv416,384JP
202.223.192.0/19IPv48,192JP
202.223.224.0/22IPv41,024JP
202.223.228.0/23IPv4512JP
202.223.232.0/21IPv42,048JP
202.223.240.0/20IPv44,096JP
202.231.0.0/18IPv416,384JP
202.235.128.0/18IPv416,384JP
202.236.2.0/24IPv4256JP
202.236.16.0/24IPv4256JP
202.236.33.0/24IPv4256JP

Capped at 400 rows to keep the page a sane size. The filter searches only what is rendered.