asn.dev

Address space

AS5653 UCSF

IPv4 prefixes 47 196K addresses
IPv6 prefixes 3
Most common size /23 IPv4
Flagged 7

Shape

Prefix sizes

IPv4
/16
/16: 1
1
/18
/18: 3
3
/19
/19: 4
4
/20
/20: 6
6
/21
/21: 5
5
/22
/22: 7
7
/23
/23: 9
9
/24
/24: 8
8
/25
/25: 1
1
/29
/29: 2
2
/31
/31: 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
/121
/121: 2
2
/123
/123: 1
1

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America50

Review

Flagged prefixes

7 of 50
PrefixFamilyAddressesCountryFlags
137.164.3.112/29IPv48USToo specific
137.164.3.136/29IPv48USToo specific
137.164.23.152/31IPv42USToo specific
205.154.255.128/25IPv4128USToo specific
2607:f380::118:9a40:3700/121IPv6—USToo specific
2607:f380::118:9a40:3880/121IPv6—USToo specific
2607:f380:1::118:9a41:7980/123IPv6—USToo 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

50 total
PrefixFamilyAddressesCountryFlags
64.54.0.0/22IPv41,024US
64.54.4.0/24IPv4256US
64.54.5.0/24IPv4256US
64.54.6.0/24IPv4256US
64.54.7.0/24IPv4256US
64.54.8.0/23IPv4512US
64.54.10.0/23IPv4512US
64.54.12.0/22IPv41,024US
64.54.16.0/20IPv44,096US
64.54.32.0/19IPv48,192US
64.54.64.0/18IPv416,384US
64.54.128.0/24IPv4256US
64.54.129.0/24IPv4256US
64.54.130.0/23IPv4512US
64.54.132.0/22IPv41,024US
64.54.136.0/21IPv42,048US
64.54.144.0/22IPv41,024US
64.54.148.0/23IPv4512US
64.54.150.0/23IPv4512US
64.54.152.0/21IPv42,048US
64.54.160.0/23IPv4512US
64.54.162.0/24IPv4256US
64.54.163.0/24IPv4256US
64.54.164.0/22IPv41,024US
64.54.168.0/21IPv42,048US
64.54.176.0/20IPv44,096US
64.54.192.0/22IPv41,024US
64.54.196.0/23IPv4512US
64.54.198.0/23IPv4512US
64.54.200.0/21IPv42,048US
64.54.208.0/20IPv44,096US
64.54.224.0/19IPv48,192US
128.218.0.0/16IPv465,536US
137.164.3.112/29IPv48USToo specific
137.164.3.136/29IPv48USToo specific
137.164.23.152/31IPv42USToo specific
169.230.0.0/18IPv416,384US
169.230.64.0/21IPv42,048US
169.230.72.0/22IPv41,024US
169.230.78.0/23IPv4512US
169.230.80.0/20IPv44,096US
169.230.96.0/19IPv48,192US
169.230.128.0/18IPv416,384US
169.230.192.0/19IPv48,192US
169.230.224.0/20IPv44,096US
169.230.240.0/20IPv44,096US
205.154.255.128/25IPv4128USToo specific
2607:f380::118:9a40:3700/121IPv6—USToo specific
2607:f380::118:9a40:3880/121IPv6—USToo specific
2607:f380:1::118:9a41:7980/123IPv6—USToo specific