AS321
United States Department of Defense (dod) — mail.mil
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Summary
| Country |
 United States
|
| Organization | United States Department of Defense (dod) |
| Domain | mail.mil |
| Number of IPv4 | 69,120 |
| Number of IPv6 | 3.0949× 1026 |
| AS Type | Government |
| Registry | ARIN |
| Allocated | June 30, 1989 (about 36 years ago) |
| Updated | September 12, 2025 (about 26 days ago) |
IP Ranges
AS321 announces 15 IPv4 ranges and 1 IPv6 range.
That's a total of 69,120 IPv4 addresses and 3.0949× 1026 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 55.24.0.0/16 |
Headquarters, Usaisc
|
65,536 | ARIN | REALLOCATION |
| 55.24.20.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.51.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.87.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.105.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.229.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.230.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.231.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.232.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.234.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.236.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 55.24.251.0/24 |
Headquarters, Usaisc
|
256 | ARIN | REALLOCATION |
| 139.241.3.0/24 |
Dod Network Information Center
|
256 | ARIN | REALLOCATION |
| 139.241.58.0/24 |
Dod Network Information Center
|
256 | ARIN | REALLOCATION |
| 139.241.59.0/24 |
Dod Network Information Center
|
256 | ARIN | REALLOCATION |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2608:14a:3100::/40 |
United States Department of Defense (dod)
|
3.0949× 1026 | ARIN | ALLOCATION |
Peers
AS321 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.
Upstreams
AS321 connects to the global Internet via at least 4 upstream providers. In this setup, AS321 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS321 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.