Address space
AS21708 SDCOE
IPv4 prefixes
26
8.46K addresses
IPv6 prefixes
1
Most common size
/24
IPv4
Flagged
16
Shape
Prefix sizes
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
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 27 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 137.164.12.4/30 | IPv4 | 4 | US | Too specific |
| 137.164.35.68/31 | IPv4 | 2 | US | Too specific |
| 137.164.38.64/31 | IPv4 | 2 | US | Too specific |
| 209.66.192.0/25 | IPv4 | 128 | US | Too specific |
| 209.66.192.128/26 | IPv4 | 64 | US | Too specific |
| 209.66.192.192/27 | IPv4 | 32 | US | Too specific |
| 209.66.192.224/28 | IPv4 | 16 | US | Too specific |
| 209.66.192.240/29 | IPv4 | 8 | US | Too specific |
| 209.66.192.248/29 | IPv4 | 8 | US | Too specific |
| 209.66.197.0/25 | IPv4 | 128 | US | Too specific |
| 209.66.197.128/26 | IPv4 | 64 | US | Too specific |
| 209.66.197.192/26 | IPv4 | 64 | US | Too specific |
| 209.66.199.0/26 | IPv4 | 64 | US | Too specific |
| 209.66.199.64/26 | IPv4 | 64 | US | Too specific |
| 209.66.199.128/25 | IPv4 | 128 | US | Too specific |
| 2607:f380:1::118:9a42:6400/123 | IPv6 | — | US | Too 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
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 137.164.12.4/30 | IPv4 | 4 | US | Too specific |
| 137.164.35.68/31 | IPv4 | 2 | US | Too specific |
| 137.164.38.64/31 | IPv4 | 2 | US | Too specific |
| 198.133.204.0/24 | IPv4 | 256 | US | |
| 209.66.192.0/25 | IPv4 | 128 | US | Too specific |
| 209.66.192.128/26 | IPv4 | 64 | US | Too specific |
| 209.66.192.192/27 | IPv4 | 32 | US | Too specific |
| 209.66.192.224/28 | IPv4 | 16 | US | Too specific |
| 209.66.192.240/29 | IPv4 | 8 | US | Too specific |
| 209.66.192.248/29 | IPv4 | 8 | US | Too specific |
| 209.66.193.0/24 | IPv4 | 256 | US | |
| 209.66.194.0/23 | IPv4 | 512 | US | |
| 209.66.196.0/24 | IPv4 | 256 | US | |
| 209.66.197.0/25 | IPv4 | 128 | US | Too specific |
| 209.66.197.128/26 | IPv4 | 64 | US | Too specific |
| 209.66.197.192/26 | IPv4 | 64 | US | Too specific |
| 209.66.198.0/24 | IPv4 | 256 | US | |
| 209.66.199.0/26 | IPv4 | 64 | US | Too specific |
| 209.66.199.64/26 | IPv4 | 64 | US | Too specific |
| 209.66.199.128/25 | IPv4 | 128 | US | Too specific |
| 209.66.200.0/21 | IPv4 | 2,048 | US | |
| 209.66.208.0/24 | IPv4 | 256 | US | |
| 209.66.209.0/24 | IPv4 | 256 | US | |
| 209.66.210.0/23 | IPv4 | 512 | US | |
| 209.66.212.0/22 | IPv4 | 1,024 | US | |
| 209.66.216.0/21 | IPv4 | 2,048 | US | |
| 2607:f380:1::118:9a42:6400/123 | IPv6 | — | US | Too specific |