asn.dev

Address space

AS23793 AIST National Institute of Advanced Industrial Science and Technology

Unclassified APNIC

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

Shape

IPv4 prefix sizes

All 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

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

IPv6 prefix sizes

All IPv6

This network announces no IPv6 we can see.

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.