asn.dev

Address space

AS59 WISC-MADISON-AS

Unclassified ARIN

IPv4 prefixes 33 331K addresses
IPv6 prefixes 1
Most common size /24 IPv4
Flagged 6

Shape

IPv4 prefix sizes

All IPv4
/16
/16: 3
3
/17
/17: 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: 1
1
/30
/30: 1
1

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
/32
/32: 1
1

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America34

Review

Flagged prefixes

6 of 34
PrefixFamilyAddressesCountryFlags
144.92.233.0/26IPv464USToo specific
144.92.233.64/27IPv432USToo specific
144.92.233.96/28IPv416USToo specific
144.92.233.112/30IPv44USToo specific
144.92.233.120/29IPv48USToo specific
144.92.233.128/25IPv4128USToo specific

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