asn.dev

Address space

AS195 SDSC-AS

Unclassified ARIN

IPv4 prefixes 203 154K addresses
IPv6 prefixes 10
Most common size /32 IPv4
Flagged 158

Shape

IPv4 prefix sizes

All IPv4
/17
/17: 1
1
/18
/18: 3
3
/19
/19: 2
2
/20
/20: 4
4
/21
/21: 10
10
/22
/22: 9
9
/23
/23: 10
10
/24
/24: 11
11
/25
/25: 8
8
/26
/26: 7
7
/27
/27: 8
8
/28
/28: 6
6
/29
/29: 11
11
/30
/30: 17
17
/31
/31: 45
45
/32
/32: 51
51

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
/34
/34: 2
2
/35
/35: 1
1
/36
/36: 1
1
/37
/37: 1
1
/122
/122: 3
3
/123
/123: 2
2

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America213

Review

Flagged prefixes

158 of 213
PrefixFamilyAddressesCountryFlags
67.58.53.144/28IPv416USToo specific
67.58.54.128/25IPv4128USToo specific
132.249.212.0/25IPv4128USToo specific
132.249.212.128/27IPv432USToo specific
132.249.212.160/27IPv432USToo specific
132.249.212.192/26IPv464USToo specific
132.249.246.0/27IPv432USToo specific
132.249.246.32/27IPv432USToo specific
132.249.246.64/26IPv464USToo specific
132.249.246.128/25IPv4128USToo specific
137.164.23.42/31IPv42USToo specific
137.164.23.128/29IPv48USToo specific
137.164.24.152/29IPv48USToo specific
192.31.21.0/29IPv48USToo specific
192.31.21.8/31IPv42USToo specific
192.31.21.10/32IPv41USToo specific
192.31.21.11/32IPv41USToo specific
192.31.21.12/30IPv44USToo specific
192.31.21.16/29IPv48USToo specific
192.31.21.24/30IPv44USToo specific
192.31.21.28/31IPv42USToo specific
192.31.21.30/32IPv41USToo specific
192.31.21.31/32IPv41USToo specific
192.31.21.32/30IPv44USToo specific
192.31.21.36/31IPv42USToo specific

The first 25. Every flag also shows in the IPv4 and IPv6 lists.

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