asn.dev

Address space

AS23793 AIST National Institute of Advanced Industrial Science and Technology

IPv4 prefixes 30 200K addresses
IPv6 prefixes 0
Most common size /24 IPv4
Flagged 6

Shape

Prefix sizes

IPv4
/16
/16: 2
2
/18
/18: 2
2
/19
/19: 2
2
/20
/20: 2
2
/21
/21: 2
2
/22
/22: 3
3
/23
/23: 5
5
/24
/24: 6
6
/25
/25: 1
1
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 1
1
/29
/29: 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.

Geography

Where the space lands

CountryNamePrefixes
JPJapan30

Review

Flagged prefixes

6 of 30
PrefixFamilyAddressesCountryFlags
150.18.129.0/29IPv48JPToo specific
150.18.129.8/29IPv48JPToo specific
150.18.129.16/28IPv416JPToo specific
150.18.129.32/27IPv432JPToo specific
150.18.129.64/26IPv464JPToo specific
150.18.129.128/25IPv4128JPToo 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

30 total
PrefixFamilyAddressesCountryFlags
150.18.0.0/22IPv41,024JP
150.18.4.0/23IPv4512JP
150.18.6.0/24IPv4256JP
150.18.7.0/24IPv4256JP
150.18.8.0/21IPv42,048JP
150.18.16.0/20IPv44,096JP
150.18.32.0/19IPv48,192JP
150.18.64.0/18IPv416,384JP
150.18.128.0/24IPv4256JP
150.18.129.0/29IPv48JPToo specific
150.18.129.8/29IPv48JPToo specific
150.18.129.16/28IPv416JPToo specific
150.18.129.32/27IPv432JPToo specific
150.18.129.64/26IPv464JPToo specific
150.18.129.128/25IPv4128JPToo specific
150.18.130.0/23IPv4512JP
150.18.132.0/22IPv41,024JP
150.18.136.0/21IPv42,048JP
150.18.144.0/20IPv44,096JP
150.18.160.0/19IPv48,192JP
150.18.192.0/18IPv416,384JP
150.29.0.0/16IPv465,536JP
150.82.0.0/16IPv465,536JP
192.31.198.0/23IPv4512JP
192.31.200.0/22IPv41,024JP
192.31.204.0/23IPv4512JP
192.31.206.0/24IPv4256JP
192.33.135.0/24IPv4256JP
192.50.73.0/24IPv4256JP
192.218.230.0/23IPv4512JP