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Autonomous System details for AS138

AS138

United States Department of Defense (DoD) • mail.mil

AS138 — United States Department of Defense (DoD)

AS Name

DNIC-AS-00138

Country

United States (US)

Website

mail.mil

Number of IPv4

236,288

Number of IPv6

ASN type

Government

Status

Assigned

Registry

ARIN

Allocated

November 11, 1987

Last updated

September 12, 2025

IP Ranges

18 IPv4 prefixes

Prefix	Company	Number of IPs
131.66.0.0/16		65,536
131.67.0.0/16		65,536
131.68.0.0/16		65,536
141.234.0.0/18		16,384
141.234.64.0/18		16,384
144.183.15.0/24		256
144.183.16.0/24		256
144.183.17.0/24		256
144.183.20.0/24		256
144.183.32.0/22		1,024
144.183.127.0/24		256
144.183.128.0/23		512
144.183.130.0/24		256
144.183.131.0/24		256
144.183.196.0/22		1,024
144.183.200.0/21		2,048
144.183.216.0/24		256
144.183.227.0/24		256

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS138

0 peers

AS138 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS138

1 upstreams

AS27064

AS138 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS138 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS138

0 downstreams

AS138 has no downstreams recorded.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.