All ASNs

Autonomous System details for AS668

AS668

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

AS668 — United States Department of Defense (DoD)

AS Name

DNIC-AS-00668

Country

United States (US)

Website

mail.mil

Number of IPv4

2,498,048

Number of IPv6

7.92 × 10²⁸

ASN type

Education

Status

Assigned

Registry

ARIN

Allocated

April 24, 1990

Last updated

September 12, 2025

IP Ranges

190 IPv4 prefixes, 1 IPv6 prefixes

Prefix	Company	Number of IPs
6.2.0.0/18	Headquarters, USAISC	16,384
6.2.64.0/19	Headquarters, USAISC	8,192
6.2.96.0/22	Headquarters, USAISC	1,024
6.2.104.0/22	Headquarters, USAISC	1,024
6.2.112.0/22	Headquarters, USAISC	1,024
6.2.120.0/22	Headquarters, USAISC	1,024
6.3.0.0/17	Headquarters, USAISC	32,768
6.4.0.0/16	Headquarters, USAISC	65,536
6.11.1.0/24	Headquarters, USAISC	256
6.11.51.0/24	Headquarters, USAISC	256
6.11.250.0/24	Headquarters, USAISC	256
6.11.254.0/24	Headquarters, USAISC	256
6.15.100.0/24	Headquarters, USAISC	256
128.132.0.0/16	Air Force Systems Networking	65,536
128.160.0.0/17	Department of Immigration	32,768
129.92.0.0/16	Air Force Systems Networking	65,536
129.229.0.0/16	Headquarters, USAISC	65,536
130.109.0.0/16	Department of Immigration	65,536
130.163.0.0/16	Department of Immigration	65,536
131.92.131.0/24	Headquarters, USAISC	256
131.92.132.0/22	Headquarters, USAISC	1,024
131.92.136.0/21	Headquarters, USAISC	2,048
131.92.144.0/21	Headquarters, USAISC	2,048
131.92.162.0/23	Headquarters, USAISC	512
131.92.164.0/22	Headquarters, USAISC	1,024
131.92.168.0/21	Headquarters, USAISC	2,048
131.92.176.0/22	Headquarters, USAISC	1,024
131.92.180.0/23	Headquarters, USAISC	512
131.92.182.0/23	Headquarters, USAISC	512
131.92.184.0/23	Headquarters, USAISC	512
131.92.186.0/24	Headquarters, USAISC	256
131.92.192.0/18	Headquarters, USAISC	16,384
131.120.0.0/16	Department of Immigration	65,536
131.121.0.0/16	Department of Immigration	65,536
131.122.0.0/16	Department of Immigration	65,536
131.214.0.0/16	Air Force Systems Networking	65,536
131.218.0.0/16	Headquarters, USAISC	65,536
131.250.0.0/17	Department of Immigration	32,768
131.250.128.0/18	Department of Immigration	16,384
131.250.192.0/20	Department of Immigration	4,096
132.45.0.0/16	Air Force Systems Networking	65,536
132.193.0.0/16	Headquarters, USAISC	65,536
134.164.220.0/24	Headquarters, USAISC	256
134.166.0.0/18	Air Force Systems Networking	16,384
134.166.64.0/18	Air Force Systems Networking	16,384
134.166.128.0/22	Air Force Systems Networking	1,024
134.166.132.0/23	Air Force Systems Networking	512
134.166.134.0/24	Air Force Systems Networking	256
134.166.135.0/24	Air Force Systems Networking	256
134.166.136.0/23	Air Force Systems Networking	512
134.166.138.0/24	Air Force Systems Networking	256
134.166.144.0/20	Air Force Systems Networking	4,096
137.128.0.0/16	Headquarters, USAISC	65,536
140.6.0.0/16	Department of Immigration	65,536
140.25.0.0/16	Department of Immigration	65,536
140.25.98.0/24	Department of Immigration	256
140.27.8.0/22	Department of Immigration	1,024
140.27.10.0/23	Department of Immigration	512
140.27.12.0/23	Department of Immigration	512
140.27.14.0/23	Department of Immigration	512
140.31.0.0/16	Department of Immigration	65,536
140.32.0.0/16	Department of Immigration	65,536
140.178.0.0/16	Department of Immigration	65,536
143.56.0.0/16		65,536
144.3.0.0/16	Headquarters, USAISC	65,536
147.227.0.0/16	Headquarters, USAISC	65,536
147.241.56.0/21	Headquarters, USAISC	2,048
147.241.72.0/21	Headquarters, USAISC	2,048
147.241.80.0/21	Headquarters, USAISC	2,048
147.241.88.0/21	Headquarters, USAISC	2,048
147.241.96.0/22	Headquarters, USAISC	1,024
147.241.104.0/22	Headquarters, USAISC	1,024
147.241.112.0/22	Headquarters, USAISC	1,024
147.241.118.0/24	Headquarters, USAISC	256
147.241.120.0/22	Headquarters, USAISC	1,024
147.241.126.0/24	Headquarters, USAISC	256
147.241.128.0/21	Headquarters, USAISC	2,048
147.241.160.0/21	Headquarters, USAISC	2,048
147.241.168.0/21	Headquarters, USAISC	2,048
147.241.176.0/21	Headquarters, USAISC	2,048
147.241.192.0/18	Headquarters, USAISC	16,384
147.248.48.0/20	Headquarters, USAISC	4,096
150.125.0.0/16		65,536
155.141.0.0/16	Headquarters, USAISC	65,536
155.148.0.0/17	Headquarters, USAISC	32,768
155.148.128.0/18	Headquarters, USAISC	16,384
155.148.192.0/19	Headquarters, USAISC	8,192
155.148.224.0/20	Headquarters, USAISC	4,096
155.148.240.0/21	Headquarters, USAISC	2,048
155.154.0.0/16	Headquarters, USAISC	65,536
157.187.0.0/16		65,536
158.12.0.0/16	Headquarters, USAISC	65,536
163.240.0.0/16		65,536
164.49.0.0/16	Headquarters, USAISC	65,536
164.122.0.0/20	Air Force Systems Networking	4,096
164.172.0.0/16	Headquarters, USAISC	65,536
164.173.0.0/16	Headquarters, USAISC	65,536
164.191.0.0/16	Department of Immigration	65,536
192.5.17.0/24	Various Registries (Maintained by ARIN)	256
192.5.21.0/24	Headquarters, USAISC	256
2001:480::/32	High Performance Computing	7.92 × 10²⁸

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 AS668

13 peers

AS293 AS1828 AS2153 AS2914 AS4181 AS6082 AS6360 AS10764 AS22335 AS23367 AS49544 AS137409 AS11537

AS668 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 AS668

3 upstreams

AS701 AS6939 AS7575

AS668 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS668 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS668

20 downstreams

AS13 AS22 AS37 AS48 AS84 AS89 AS121 AS213 AS228 AS252 AS289 AS518 AS687 AS1508 AS2621 AS5058 AS5957 AS5978 AS6009 AS393399

AS668 provides internet connectivity to these downstream Autonomous Systems.

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.