asn.dev

Address space

AS2553 FSU-AS

IPv4 prefixes 27 196K addresses
IPv6 prefixes 1
Most common size /22 IPv4
Flagged 4

Shape

Prefix sizes

IPv4
/17
/17: 3
3
/18
/18: 3
3
/19
/19: 3
3
/20
/20: 3
3
/21
/21: 3
3
/22
/22: 4
4
/23
/23: 2
2
/24
/24: 2
2
/25
/25: 1
1
/26
/26: 1
1
/27
/27: 1
1
/28
/28: 1
1

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.

Shape

Prefix sizes

IPv6
/48
/48: 1
1

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America28

Review

Flagged prefixes

4 of 28
PrefixFamilyAddressesCountryFlags
128.186.217.16/28IPv416USToo specific
128.186.217.32/27IPv432USToo specific
128.186.217.64/26IPv464USToo specific
128.186.217.128/25IPv4128USToo 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

28 total
PrefixFamilyAddressesCountryFlags
128.186.0.0/17IPv432,768US
128.186.128.0/18IPv416,384US
128.186.192.0/20IPv44,096US
128.186.208.0/21IPv42,048US
128.186.216.0/24IPv4256US
128.186.217.16/28IPv416USToo specific
128.186.217.32/27IPv432USToo specific
128.186.217.64/26IPv464USToo specific
128.186.217.128/25IPv4128USToo specific
128.186.218.0/23IPv4512US
128.186.220.0/22IPv41,024US
128.186.224.0/19IPv48,192US
144.174.0.0/18IPv416,384US
144.174.64.0/19IPv48,192US
144.174.96.0/22IPv41,024US
144.174.100.0/22IPv41,024US
144.174.104.0/21IPv42,048US
144.174.112.0/20IPv44,096US
144.174.128.0/17IPv432,768US
146.201.0.0/17IPv432,768US
146.201.128.0/18IPv416,384US
146.201.192.0/20IPv44,096US
146.201.208.0/21IPv42,048US
146.201.216.0/23IPv4512US
146.201.220.0/22IPv41,024US
146.201.224.0/19IPv48,192US
192.80.53.0/24IPv4256US
2607:f5d8:20::/48IPv6—US