asn.dev

Address space

AS17 PURDUE

Unclassified ARIN

IPv4 prefixes 71 233K addresses
IPv6 prefixes 12
Most common size /24 IPv4
Flagged 17

Shape

IPv4 prefix sizes

All IPv4
/16
/16: 2
2
/18
/18: 1
1
/19
/19: 4
4
/20
/20: 4
4
/21
/21: 9
9
/22
/22: 9
9
/23
/23: 9
9
/24
/24: 16
16
/25
/25: 2
2
/26
/26: 1
1
/27
/27: 3
3
/28
/28: 3
3
/29
/29: 2
2
/30
/30: 3
3
/31
/31: 3
3

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
/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
/45
/45: 1
1
/46
/46: 1
1
/47
/47: 1
1
/48
/48: 1
1

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America83

Review

Flagged prefixes

17 of 83
PrefixFamilyAddressesCountryFlags
192.5.40.0/28IPv416USToo specific
192.5.40.20/30IPv44USToo specific
192.5.40.24/31IPv42USToo specific
192.5.40.28/30IPv44USToo specific
192.5.40.32/27IPv432USToo specific
192.5.40.64/28IPv416USToo specific
192.5.40.80/29IPv48USToo specific
192.5.40.88/30IPv44USToo specific
192.5.40.96/27IPv432USToo specific
192.5.40.128/25IPv4128USToo specific
192.12.63.0/31IPv42USToo specific
192.12.63.4/31IPv42USToo specific
192.12.63.8/29IPv48USToo specific
192.12.63.16/28IPv416USToo specific
192.12.63.32/27IPv432USToo specific
192.12.63.64/26IPv464USToo specific
192.12.63.128/25IPv4128USToo specific

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