All ASNs

Autonomous System details for AS27138

AS27138

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

AS27138 — United States Department of Defense (DoD)

AS Name

DNIC-ASBLK-27032-27159

Country

United States (US)

Website

mail.mil

Number of IPv4

38,912

Number of IPv6

ASN type

Government

Status

Assigned

Registry

ARIN

Allocated

January 16, 2003

Last updated

September 12, 2025

IP Ranges

144 IPv4 prefixes

Prefix	Company	Number of IPs
128.26.15.0/24	Air Force Systems Networking	256
128.26.16.0/24	Air Force Systems Networking	256
128.26.17.0/24	Air Force Systems Networking	256
128.26.18.0/24	Air Force Systems Networking	256
128.26.19.0/24	Air Force Systems Networking	256
128.26.20.0/24	Air Force Systems Networking	256
128.26.21.0/24	Air Force Systems Networking	256
128.26.22.0/24	Air Force Systems Networking	256
128.26.23.0/24	Air Force Systems Networking	256
128.26.24.0/24	Air Force Systems Networking	256
128.26.25.0/24	Air Force Systems Networking	256
128.26.44.0/24	Air Force Systems Networking	256
128.26.46.0/24	Air Force Systems Networking	256
128.26.47.0/24	Air Force Systems Networking	256
128.26.48.0/24	Air Force Systems Networking	256
128.26.51.0/24	Air Force Systems Networking	256
128.26.52.0/24	Air Force Systems Networking	256
128.26.58.0/24	Air Force Systems Networking	256
128.26.77.0/24	Air Force Systems Networking	256
128.26.79.0/24	Air Force Systems Networking	256
128.26.82.0/24	Air Force Systems Networking	256
128.26.83.0/24	Air Force Systems Networking	256
128.26.85.0/24	Air Force Systems Networking	256
128.26.87.0/24	Air Force Systems Networking	256
128.26.89.0/24	Air Force Systems Networking	256
128.26.91.0/24	Air Force Systems Networking	256
128.26.100.0/24	Air Force Systems Networking	256
128.26.101.0/24	Air Force Systems Networking	256
128.26.102.0/24	Air Force Systems Networking	256
128.26.108.0/24	Air Force Systems Networking	256
128.26.109.0/24	Air Force Systems Networking	256
128.26.110.0/24	Air Force Systems Networking	256
128.26.116.0/24	Air Force Systems Networking	256
128.26.137.0/24	Air Force Systems Networking	256
128.26.138.0/24	Air Force Systems Networking	256
128.26.141.0/24	Air Force Systems Networking	256
128.26.147.0/24	Air Force Systems Networking	256
128.26.175.0/24	Air Force Systems Networking	256
128.26.231.0/24	Air Force Systems Networking	256
128.26.232.0/24	Air Force Systems Networking	256
128.26.233.0/24	Air Force Systems Networking	256
128.26.234.0/24	Air Force Systems Networking	256
128.26.239.0/24	Air Force Systems Networking	256
128.26.240.0/24	Air Force Systems Networking	256
128.26.241.0/24	Air Force Systems Networking	256
128.26.242.0/24	Air Force Systems Networking	256
128.26.243.0/24	Air Force Systems Networking	256
128.26.244.0/24	Air Force Systems Networking	256
128.26.245.0/24	Air Force Systems Networking	256
128.26.248.0/24	Air Force Systems Networking	256
128.26.249.0/24	Air Force Systems Networking	256
128.26.250.0/24	Air Force Systems Networking	256
128.26.252.0/24	Air Force Systems Networking	256
128.26.253.0/24	Air Force Systems Networking	256
139.241.220.0/24		256
139.241.221.0/24		256
139.241.242.0/24		256
139.241.243.0/24		256
198.218.1.0/24	Air Force Systems Networking	256
198.218.15.0/24	Air Force Systems Networking	256
198.218.38.0/24	Air Force Systems Networking	256
198.218.39.0/24	Air Force Systems Networking	256
198.218.40.0/24	Air Force Systems Networking	256
198.218.41.0/24	Air Force Systems Networking	256
198.218.49.0/24	Air Force Systems Networking	256
198.218.52.0/24	Air Force Systems Networking	256
198.218.54.0/24	Air Force Systems Networking	256
198.218.56.0/24	Air Force Systems Networking	256
198.218.57.0/24	Air Force Systems Networking	256
198.218.60.0/24	Air Force Systems Networking	256
198.218.61.0/24	Air Force Systems Networking	256
198.218.70.0/24	Air Force Systems Networking	256
198.218.71.0/24	Air Force Systems Networking	256
198.218.73.0/24	Air Force Systems Networking	256
198.218.74.0/24	Air Force Systems Networking	256
198.218.75.0/24	Air Force Systems Networking	256
198.218.76.0/24	Air Force Systems Networking	256
198.218.79.0/24	Air Force Systems Networking	256
198.218.80.0/24	Air Force Systems Networking	256
198.218.81.0/24	Air Force Systems Networking	256
198.218.83.0/24	Air Force Systems Networking	256
198.218.86.0/24	Air Force Systems Networking	256
198.218.91.0/24	Air Force Systems Networking	256
198.218.92.0/24	Air Force Systems Networking	256
198.218.93.0/24	Air Force Systems Networking	256
198.218.103.0/24	Air Force Systems Networking	256
198.218.112.0/24	Air Force Systems Networking	256
198.218.117.0/24	Air Force Systems Networking	256
198.218.118.0/24	Air Force Systems Networking	256
198.218.119.0/24	Air Force Systems Networking	256
198.218.157.0/24	Air Force Systems Networking	256
198.218.158.0/24	Air Force Systems Networking	256
198.218.159.0/24	Air Force Systems Networking	256
198.218.162.0/24	Air Force Systems Networking	256
198.218.200.0/24	Air Force Systems Networking	256
198.218.237.0/24	Air Force Systems Networking	256
198.218.250.0/24	Air Force Systems Networking	256
198.219.8.0/24	Air Force Systems Networking	256
198.219.10.0/24	Air Force Systems Networking	256
198.219.148.0/24	Air Force Systems Networking	256

This table only shows the first 100 of the set of IPv4 and IPv6 prefixes. All data is available via our IP data API.

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 AS27138

1 peers

AS3474

AS27138 peers with these other Autonomous Systems.

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 AS27138

1 upstreams

AS27064

AS27138 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS27138 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS27138

0 downstreams

AS27138 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.