AS121

Summary

Country	United States
Organization	United States Department of Defense (dod)
Domain	mail.mil
Number of IPv4	9,728
Number of IPv6	0
AS Type	Government
Registry	ARIN
Allocated	August 13, 1987 (about 38 years ago)
Updated	September 12, 2025 (about 5 days ago)

IP Ranges

AS121 announces 6 IPv4 ranges and 0 IPv6 range.

That's a total of 9,728 IPv4 address and 0 IPv6 address.

Prefix	Organization	Size	Registry	Status
214.54.192.0/20	Dod Network Information Center	4,096	ARIN	REALLOCATION
214.54.208.0/20	Dod Network Information Center	4,096	ARIN	REALLOCATION
214.54.224.0/23	Dod Network Information Center	512	ARIN	REALLOCATION
214.54.226.0/23	Dod Network Information Center	512	ARIN	REALLOCATION
214.54.230.0/24	Dod Network Information Center	256	ARIN	REALLOCATION
214.54.231.0/24	Dod Network Information Center	256	ARIN	REALLOCATION

Peers

AS121 does not have any direct peering agreements. Instead, its global connectivity is achieved through transit providers. While this setup ensures comprehensive reach, future peering could reduce latency and optimize route efficiency.

Upstreams

AS121 connects to the global Internet via at least 1 upstream provider. In this setup, AS121 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

Downstreams

AS121 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.