Address space
AS49 US-NATIONAL-INSTITUTE-OF-STANDARDS-AND-TECHNOLOGY
IPv4 prefixes
12
65.54K addresses
IPv6 prefixes
5
Most common size
/23
IPv4
Flagged
0
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 | 17 |
Inventory
All prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 129.6.0.0/19 | IPv4 | 8,192 | US | |
| 129.6.32.0/22 | IPv4 | 1,024 | US | |
| 129.6.36.0/24 | IPv4 | 256 | US | |
| 129.6.38.0/23 | IPv4 | 512 | US | |
| 129.6.40.0/21 | IPv4 | 2,048 | US | |
| 129.6.48.0/23 | IPv4 | 512 | US | |
| 129.6.50.0/24 | IPv4 | 256 | US | |
| 129.6.52.0/22 | IPv4 | 1,024 | US | |
| 129.6.56.0/21 | IPv4 | 2,048 | US | |
| 129.6.64.0/18 | IPv4 | 16,384 | US | |
| 129.6.128.0/17 | IPv4 | 32,768 | US | |
| 132.163.96.0/23 | IPv4 | 512 | US | |
| 2610:20:6000::/37 | IPv6 | — | US | |
| 2610:20:6f15::/48 | IPv6 | — | US | |
| 2610:20:6f96::/47 | IPv6 | — | US | |
| 2610:20:6fcd::/48 | IPv6 | — | US | |
| 2610:20:6fce::/47 | IPv6 | — | US |