asn.dev

Address space

AS4713 OCN NTT Communications Corporation

IPv4 prefixes 164 28.62M addresses
IPv6 prefixes 21
Most common size /24 IPv4
Flagged 1

Shape

Prefix sizes

IPv4
/10
/10: 2
2
/11
/11: 2
2
/12
/12: 5
5
/13
/13: 11
11
/14
/14: 7
7
/15
/15: 8
8
/16
/16: 24
24
/17
/17: 10
10
/18
/18: 7
7
/19
/19: 7
7
/20
/20: 7
7
/21
/21: 8
8
/22
/22: 12
12
/23
/23: 14
14
/24
/24: 40
40

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
/22
/22: 1
1
/32
/32: 1
1
/33
/33: 1
1
/34
/34: 1
1
/35
/35: 1
1
/36
/36: 1
1
/37
/37: 1
1
/38
/38: 1
1
/39
/39: 1
1
/40
/40: 1
1
/41
/41: 1
1
/42
/42: 1
1
/43
/43: 1
1
/44
/44: 1
1
/45
/45: 1
1
/46
/46: 1
1
/47
/47: 1
1
/48
/48: 3
3
/64
/64: 1
1

Geography

Where the space lands

CountryNamePrefixes
JPJapan185

Review

Flagged prefixes

1 of 185
PrefixFamilyAddressesCountryFlags
2407:a800:3e11:111a::/64IPv6—JPToo 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

185 total
PrefixFamilyAddressesCountryFlags
27.114.0.0/17IPv432,768JP
27.132.8.0/24IPv4256JP
27.133.240.0/22IPv41,024JP
36.52.223.0/24IPv4256JP
58.88.0.0/13IPv4524,288JP
60.32.0.0/12IPv41,048,576JP
61.4.152.0/21IPv42,048JP
61.4.160.0/20IPv44,096JP
61.112.0.0/15IPv4131,072JP
61.114.112.0/20IPv44,096JP
61.118.0.0/15IPv4131,072JP
61.126.0.0/15IPv4131,072JP
61.199.0.0/16IPv465,536JP
61.207.0.0/16IPv465,536JP
61.208.0.0/16IPv465,536JP
61.214.0.0/16IPv465,536JP
103.163.250.0/23IPv4512JP
114.144.0.0/12IPv41,048,576JP
114.160.0.0/11IPv42,097,152JP
118.0.0.0/12IPv41,048,576JP
118.16.0.0/13IPv4524,288JP
119.161.104.0/21IPv42,048JP
121.112.0.0/13IPv4524,288JP
122.1.0.0/16IPv465,536JP
122.16.0.0/12IPv41,048,576JP
123.216.0.0/13IPv4524,288JP
123.224.0.0/14IPv4262,144JP
124.84.0.0/14IPv4262,144JP
124.96.0.0/13IPv4524,288JP
125.170.0.0/16IPv465,536JP
125.172.0.0/14IPv4262,144JP
125.200.0.0/13IPv4524,288JP
133.153.0.0/20IPv44,096JP
133.153.16.0/22IPv41,024JP
133.153.20.0/23IPv4512JP
133.153.22.0/24IPv4256JP
133.153.23.0/24IPv4256JP
133.153.24.0/21IPv42,048JP
133.153.32.0/19IPv48,192JP
133.153.64.0/18IPv416,384JP
133.153.128.0/17IPv432,768JP
138.212.224.0/23IPv4512JP
138.212.227.0/24IPv4256JP
138.212.228.0/23IPv4512JP
138.212.230.0/24IPv4256JP
138.212.238.0/23IPv4512JP
138.212.241.0/24IPv4256JP
138.212.245.0/24IPv4256JP
138.212.249.0/24IPv4256JP
138.212.252.0/24IPv4256JP
150.5.64.0/18IPv416,384JP
150.35.0.0/17IPv432,768JP
150.35.128.0/18IPv416,384JP
150.35.192.0/19IPv48,192JP
150.35.224.0/21IPv42,048JP
150.35.232.0/22IPv41,024JP
150.35.236.0/22IPv41,024JP
150.35.240.0/20IPv44,096JP
150.61.4.0/24IPv4256JP
150.61.8.0/24IPv4256JP
150.61.13.0/24IPv4256JP
150.61.17.0/24IPv4256JP
150.61.31.0/24IPv4256JP
150.61.33.0/24IPv4256JP
150.61.35.0/24IPv4256JP
150.61.41.0/24IPv4256JP
150.61.46.0/24IPv4256JP
150.61.49.0/24IPv4256JP
150.61.53.0/24IPv4256JP
150.61.64.0/22IPv41,024JP
150.61.68.0/23IPv4512JP
150.61.70.0/24IPv4256JP
150.61.71.0/24IPv4256JP
150.61.72.0/21IPv42,048JP
150.61.80.0/20IPv44,096JP
150.61.96.0/19IPv48,192JP
150.61.128.0/17IPv432,768JP
153.124.192.0/21IPv42,048JP
153.128.0.0/10IPv44,194,304JP
153.192.0.0/11IPv42,097,152JP
153.224.0.0/12IPv41,048,576JP
153.240.0.0/13IPv4524,288JP
153.248.0.0/14IPv4262,144JP
153.252.0.0/15IPv4131,072JP
157.64.0.0/16IPv465,536JP
157.120.124.0/22IPv41,024JP
159.211.22.0/24IPv4256JP
159.211.224.0/24IPv4256JP
159.211.237.0/24IPv4256JP
159.211.248.0/24IPv4256JP
164.43.141.0/24IPv4256JP
164.162.6.0/23IPv4512JP
164.162.16.0/24IPv4256JP
165.108.0.0/16IPv465,536JP
165.241.0.0/16IPv465,536JP
180.0.0.0/10IPv44,194,304JP
182.161.77.0/24IPv4256JP
182.161.78.0/23IPv4512JP
198.232.16.0/24IPv4256JP
202.18.209.0/24IPv4256JP
202.18.210.0/24IPv4256JP
202.19.152.0/24IPv4256JP
202.34.80.0/22IPv41,024JP
202.34.90.0/24IPv4256JP
202.34.92.0/23IPv4512JP
202.34.94.0/24IPv4256JP
202.34.100.0/24IPv4256JP
202.34.102.0/23IPv4512JP
202.34.104.0/24IPv4256JP
202.34.106.0/23IPv4512JP
202.34.108.0/22IPv41,024JP
202.157.100.0/22IPv41,024JP
202.157.112.0/21IPv42,048JP
202.157.120.0/22IPv41,024JP
202.157.124.0/23IPv4512JP
202.191.16.0/20IPv44,096JP
202.213.16.0/22IPv41,024JP
202.216.26.0/24IPv4256JP
202.234.192.0/18IPv416,384JP
202.246.122.0/23IPv4512JP
202.246.176.0/22IPv41,024JP
202.255.27.0/24IPv4256JP
202.255.28.0/23IPv4512JP
203.139.160.0/19IPv48,192JP
203.140.96.0/19IPv48,192JP
210.132.0.0/18IPv416,384JP
210.134.16.0/20IPv44,096JP
210.145.0.0/16IPv465,536JP
210.154.0.0/16IPv465,536JP
210.160.0.0/14IPv4262,144JP
210.164.0.0/16IPv465,536JP
210.170.64.0/18IPv416,384JP
210.171.200.0/21IPv42,048JP
210.190.0.0/16IPv465,536JP
210.225.0.0/16IPv465,536JP
210.226.0.0/15IPv4131,072JP
210.232.0.0/16IPv465,536JP
210.248.0.0/16IPv465,536JP
210.254.128.0/17IPv432,768JP
211.0.0.0/16IPv465,536JP
211.1.32.0/19IPv48,192JP
211.6.0.0/16IPv465,536JP
211.11.0.0/16IPv465,536JP
211.16.0.0/15IPv4131,072JP
211.122.0.0/15IPv4131,072JP
211.129.0.0/16IPv465,536JP
211.130.0.0/18IPv416,384JP
211.130.64.0/19IPv48,192JP
211.130.128.0/17IPv432,768JP
218.43.0.0/16IPv465,536JP
218.44.0.0/16IPv465,536JP
218.47.0.0/16IPv465,536JP
218.224.0.0/16IPv465,536JP
218.230.128.0/17IPv432,768JP
219.96.128.0/17IPv432,768JP
219.114.0.0/17IPv432,768JP
219.160.0.0/13IPv4524,288JP
220.96.0.0/14IPv4262,144JP
220.104.0.0/13IPv4524,288JP
220.220.0.0/15IPv4131,072JP
221.113.128.0/17IPv432,768JP
221.184.0.0/13IPv4524,288JP
222.144.0.0/13IPv4524,288JP
223.216.0.0/14IPv4262,144JP
2001:380::/46IPv6—JP
2001:380:4::/48IPv6—JP
2001:380:5::/48IPv6—JP
2001:380:6::/47IPv6—JP
2001:380:8::/45IPv6—JP
2001:380:10::/44IPv6—JP
2001:380:20::/43IPv6—JP
2001:380:40::/42IPv6—JP
2001:380:80::/41IPv6—JP
2001:380:100::/40IPv6—JP
2001:380:200::/39IPv6—JP
2001:380:400::/38IPv6—JP
2001:380:800::/37IPv6—JP
2001:380:1000::/36IPv6—JP
2001:380:2000::/35IPv6—JP
2001:380:4000::/34IPv6—JP
2001:380:8000::/33IPv6—JP
2400:4000::/22IPv6—JP
2400:7800::/32IPv6—JP
2407:a800:3e11:111a::/64IPv6—JPToo specific
2407:a800:3e12::/48IPv6—JP