asn.dev

Address space

AS18558 NETBLK-RCOEK

IPv4 prefixes 123 72.20K addresses
IPv6 prefixes 5
Most common size /24 IPv4
Flagged 63

Shape

Prefix sizes

IPv4
/19
/19: 1
1
/20
/20: 5
5
/21
/21: 6
6
/22
/22: 15
15
/23
/23: 15
15
/24
/24: 22
22
/25
/25: 10
10
/26
/26: 12
12
/27
/27: 9
9
/28
/28: 9
9
/29
/29: 8
8
/30
/30: 4
4
/31
/31: 5
5
/32
/32: 2
2

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
/32
/32: 1
1
/122
/122: 2
2
/123
/123: 2
2

Geography

Where the space lands

CountryNamePrefixes
USUnited States of America128

Review

Flagged prefixes

63 of 128
PrefixFamilyAddressesCountryFlags
137.164.1.110/31IPv42USToo specific
137.164.1.236/30IPv44USToo specific
137.164.3.16/31IPv42USToo specific
137.164.13.36/30IPv44USToo specific
204.100.37.0/29IPv48USToo specific
204.100.37.8/29IPv48USToo specific
204.100.37.16/28IPv416USToo specific
204.100.37.32/27IPv432USToo specific
204.100.37.64/26IPv464USToo specific
204.100.37.128/25IPv4128USToo specific
204.100.64.0/29IPv48USToo specific
204.100.64.8/31IPv42USToo specific
204.100.64.10/31IPv42USToo specific
204.100.64.12/30IPv44USToo specific
204.100.64.16/28IPv416USToo specific
204.100.64.32/27IPv432USToo specific
204.100.64.64/26IPv464USToo specific
204.100.64.128/25IPv4128USToo specific
204.100.84.0/25IPv4128USToo specific
204.100.84.128/26IPv464USToo specific
204.100.84.192/26IPv464USToo specific
204.100.169.0/26IPv464USToo specific
204.100.169.64/29IPv48USToo specific
204.100.169.72/29IPv48USToo specific
204.100.169.80/28IPv416USToo specific
204.100.169.96/27IPv432USToo specific
204.100.169.128/25IPv4128USToo specific
204.100.244.0/25IPv4128USToo specific
204.100.244.128/26IPv464USToo specific
204.100.244.192/27IPv432USToo specific
204.100.244.224/28IPv416USToo specific
204.100.244.240/29IPv48USToo specific
204.100.244.248/29IPv48USToo specific
204.100.250.0/26IPv464USToo specific
204.100.250.64/27IPv432USToo specific
204.100.250.96/27IPv432USToo specific
204.100.250.128/25IPv4128USToo specific
204.100.251.0/25IPv4128USToo specific
204.100.251.128/26IPv464USToo specific
204.100.251.192/27IPv432USToo specific
204.100.251.224/28IPv416USToo specific
204.100.251.240/28IPv416USToo specific
204.100.252.0/26IPv464USToo specific
204.100.252.64/26IPv464USToo specific
204.100.252.128/25IPv4128USToo specific
204.100.254.0/25IPv4128USToo specific
204.100.254.128/26IPv464USToo specific
204.100.254.192/28IPv416USToo specific
204.100.254.208/28IPv416USToo specific
204.100.254.224/27IPv432USToo specific
204.100.255.0/31IPv42USToo specific
204.100.255.2/32IPv41USToo specific
204.100.255.3/32IPv41USToo specific
204.100.255.4/30IPv44USToo specific
204.100.255.8/29IPv48USToo specific
204.100.255.16/28IPv416USToo specific
204.100.255.32/27IPv432USToo specific
204.100.255.64/26IPv464USToo specific
204.100.255.128/25IPv4128USToo specific
2607:f380::118:9a40:16e0/123IPv6—USToo specific
2607:f380::118:9a40:1ec0/122IPv6—USToo specific
2607:f380::118:9a40:d240/122IPv6—USToo specific
2607:f380:1::118:9a40:3100/123IPv6—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

128 total
PrefixFamilyAddressesCountryFlags
137.164.1.110/31IPv42USToo specific
137.164.1.236/30IPv44USToo specific
137.164.3.16/31IPv42USToo specific
137.164.13.36/30IPv44USToo specific
198.188.95.0/24IPv4256US
204.26.32.0/20IPv44,096US
204.26.48.0/21IPv42,048US
204.26.56.0/24IPv4256US
204.100.0.0/19IPv48,192US
204.100.32.0/22IPv41,024US
204.100.36.0/24IPv4256US
204.100.37.0/29IPv48USToo specific
204.100.37.8/29IPv48USToo specific
204.100.37.16/28IPv416USToo specific
204.100.37.32/27IPv432USToo specific
204.100.37.64/26IPv464USToo specific
204.100.37.128/25IPv4128USToo specific
204.100.38.0/23IPv4512US
204.100.40.0/22IPv41,024US
204.100.44.0/23IPv4512US
204.100.46.0/23IPv4512US
204.100.48.0/21IPv42,048US
204.100.56.0/24IPv4256US
204.100.57.0/24IPv4256US
204.100.58.0/23IPv4512US
204.100.60.0/22IPv41,024US
204.100.64.0/29IPv48USToo specific
204.100.64.8/31IPv42USToo specific
204.100.64.10/31IPv42USToo specific
204.100.64.12/30IPv44USToo specific
204.100.64.16/28IPv416USToo specific
204.100.64.32/27IPv432USToo specific
204.100.64.64/26IPv464USToo specific
204.100.64.128/25IPv4128USToo specific
204.100.65.0/24IPv4256US
204.100.66.0/23IPv4512US
204.100.68.0/22IPv41,024US
204.100.72.0/21IPv42,048US
204.100.80.0/23IPv4512US
204.100.82.0/24IPv4256US
204.100.83.0/24IPv4256US
204.100.84.0/25IPv4128USToo specific
204.100.84.128/26IPv464USToo specific
204.100.84.192/26IPv464USToo specific
204.100.85.0/24IPv4256US
204.100.86.0/23IPv4512US
204.100.88.0/22IPv41,024US
204.100.92.0/23IPv4512US
204.100.94.0/24IPv4256US
204.100.95.0/24IPv4256US
204.100.96.0/22IPv41,024US
204.100.100.0/22IPv41,024US
204.100.104.0/21IPv42,048US
204.100.112.0/20IPv44,096US
204.100.128.0/22IPv41,024US
204.100.132.0/23IPv4512US
204.100.134.0/24IPv4256US
204.100.135.0/24IPv4256US
204.100.136.0/22IPv41,024US
204.100.140.0/22IPv41,024US
204.100.144.0/20IPv44,096US
204.100.160.0/21IPv42,048US
204.100.168.0/24IPv4256US
204.100.169.0/26IPv464USToo specific
204.100.169.64/29IPv48USToo specific
204.100.169.72/29IPv48USToo specific
204.100.169.80/28IPv416USToo specific
204.100.169.96/27IPv432USToo specific
204.100.169.128/25IPv4128USToo specific
204.100.170.0/23IPv4512US
204.100.172.0/22IPv41,024US
204.100.176.0/20IPv44,096US
204.100.192.0/23IPv4512US
204.100.194.0/24IPv4256US
204.100.195.0/24IPv4256US
204.100.196.0/22IPv41,024US
204.100.200.0/21IPv42,048US
204.100.208.0/22IPv41,024US
204.100.212.0/23IPv4512US
204.100.214.0/24IPv4256US
204.100.215.0/24IPv4256US
204.100.216.0/22IPv41,024US
204.100.220.0/24IPv4256US
204.100.221.0/24IPv4256US
204.100.222.0/23IPv4512US
204.100.224.0/20IPv44,096US
204.100.240.0/22IPv41,024US
204.100.244.0/25IPv4128USToo specific
204.100.244.128/26IPv464USToo specific
204.100.244.192/27IPv432USToo specific
204.100.244.224/28IPv416USToo specific
204.100.244.240/29IPv48USToo specific
204.100.244.248/29IPv48USToo specific
204.100.245.0/24IPv4256US
204.100.246.0/23IPv4512US
204.100.248.0/23IPv4512US
204.100.250.0/26IPv464USToo specific
204.100.250.64/27IPv432USToo specific
204.100.250.96/27IPv432USToo specific
204.100.250.128/25IPv4128USToo specific
204.100.251.0/25IPv4128USToo specific
204.100.251.128/26IPv464USToo specific
204.100.251.192/27IPv432USToo specific
204.100.251.224/28IPv416USToo specific
204.100.251.240/28IPv416USToo specific
204.100.252.0/26IPv464USToo specific
204.100.252.64/26IPv464USToo specific
204.100.252.128/25IPv4128USToo specific
204.100.253.0/24IPv4256US
204.100.254.0/25IPv4128USToo specific
204.100.254.128/26IPv464USToo specific
204.100.254.192/28IPv416USToo specific
204.100.254.208/28IPv416USToo specific
204.100.254.224/27IPv432USToo specific
204.100.255.0/31IPv42USToo specific
204.100.255.2/32IPv41USToo specific
204.100.255.3/32IPv41USToo specific
204.100.255.4/30IPv44USToo specific
204.100.255.8/29IPv48USToo specific
204.100.255.16/28IPv416USToo specific
204.100.255.32/27IPv432USToo specific
204.100.255.64/26IPv464USToo specific
204.100.255.128/25IPv4128USToo specific
2607:f380::118:9a40:16e0/123IPv6—USToo specific
2607:f380::118:9a40:1ec0/122IPv6—USToo specific
2607:f380::118:9a40:d240/122IPv6—USToo specific
2607:f380:1::118:9a40:3100/123IPv6—USToo specific
2607:f708::/32IPv6—US