AS668 — DNIC-AS-00668

Network type: business

AS668 announces 165 IPv4 prefixes covering 2,555,904 addresses and 121 IPv6 prefixes.

About this network

AS668 (DNIC-AS-00668) is a US Department of Defense network, operated as the Defense Research and Engineering Network (DREN) — the DoD's high-performance backbone for its research, test, and engineering communities.

What it's used for

• Connecting DoD research and engineering sites to geographically distributed supercomputing resources over a secure, high-bandwidth, low-latency network.

Notable

• An IP here belongs to a US government / DoD operational network, not a commercial ISP or hosting provider. Most of the space is an internal "DoD-only" network; a smaller portion reaches the public internet through dedicated security gateways.
• Registered to the DoD Network Information Center (DNIC), which holds many US federal-government ASNs.

Interesting

• DREN links roughly 200 sites; its fourth generation (DREN 4) was completed in 2023.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 6.2.0.0/18
• 6.2.64.0/19
• 6.2.96.0/22
• 6.2.104.0/22
• 6.2.112.0/22
• 6.2.120.0/22
• 6.3.0.0/17
• 6.4.0.0/16
• 6.11.1.0/24
• 6.11.51.0/24
• 6.11.250.0/24
• 6.11.254.0/24
• 6.15.100.0/24
• 128.132.0.0/16
• 128.160.0.0/17
• 129.92.0.0/16
• 129.229.0.0/16
• 130.109.0.0/16
• 130.163.0.0/16
• 131.92.131.0/24
• 131.92.132.0/22
• 131.92.136.0/21
• 131.92.144.0/21
• 131.92.162.0/23
• 131.92.164.0/22
• 131.92.168.0/21
• 131.92.176.0/21
• 131.92.184.0/23
• 131.92.186.0/24
• 131.92.192.0/18
• 131.120.0.0/15
• 131.122.0.0/16
• 131.214.0.0/16
• 131.218.0.0/16
• 131.250.0.0/17
• 131.250.128.0/18
• 131.250.192.0/20
• 132.45.0.0/16
• 132.193.0.0/16
• 134.164.220.0/24
• 134.166.0.0/17
• 134.166.128.0/21
• 134.166.136.0/23
• 134.166.138.0/24
• 134.166.144.0/20
• 137.128.0.0/16
• 140.5.0.0/16
• 140.6.0.0/16
• 140.25.0.0/16
• 140.27.8.0/21
• 140.31.0.0/16
• 140.32.0.0/16
• 140.178.0.0/16
• 143.56.0.0/16
• 144.3.0.0/16
• 147.227.0.0/16
• 147.241.72.0/21
• 147.241.80.0/20
• 147.241.96.0/22
• 147.241.104.0/22
• 147.241.112.0/22
• 147.241.118.0/24
• 147.241.120.0/22
• 147.241.126.0/24
• 147.241.160.0/21
• 147.241.192.0/18
• 147.248.48.0/20
• 150.125.0.0/16
• 155.29.152.0/21
• 155.141.0.0/16
• 155.148.0.0/17
• 155.148.128.0/18
• 155.148.192.0/19
• 155.148.224.0/20
• 155.148.240.0/21
• 155.154.0.0/16
• 157.187.0.0/16
• 158.12.0.0/16
• 163.240.0.0/16
• 164.49.0.0/16
• 164.122.0.0/20
• 164.172.0.0/15
• 164.191.0.0/16
• 192.5.17.0/24
• 192.5.21.0/24
• 192.5.22.0/23
• 192.5.41.0/24
• 192.5.148.0/24
• 192.12.124.0/24
• 192.16.167.0/24
• 192.31.147.0/24
• 192.42.141.0/24
• 192.48.242.0/24
• 192.55.117.0/24
• 192.58.244.0/24
• 192.67.80.0/24
• 192.67.93.0/24
• 192.86.66.0/24
• 192.88.110.0/24
• 192.100.92.0/24

and 186 more.

Upstream networks

• AS6939 Hurricane Electric LLC
• AS701 Verizon Business
• AS2914 NTT America, Inc.
• AS7575 Australian Academic and Research Network (AARNet)
• AS11537 Internet2
• AS2153 CENIC
• AS293 ESnet
• AS35889 University of Hawaii
• AS6360 University of Hawaii

Downstream networks

• AS37 Navy Network Information Center (NNIC)
• AS518 United States Department of Defense (DoD)
• AS13 Headquarters, USAISC
• AS289 Headquarters, USAISC
• AS89 Navy Network Information Center (NNIC)
• AS22 Navy Network Information Center (NNIC)
• AS121 United States Department of Defense (DoD)
• AS84 Navy Network Information Center (NNIC)
• AS252 Headquarters, USAISC
• AS687 United States Department of Defense (DoD)
• AS5957 United States Department of Defense (DoD)
• AS228 United States Department of Defense (DoD)
• AS5132 United States Department of Defense (DoD)
• AS5978 United States Department of Defense (DoD)
• AS48 Navy Network Information Center (NNIC)
• AS2621 United States Department of Defense (DoD)
• AS6009 United States Department of Defense (DoD)
• AS5058 Navy Network Information Center (NNIC)
• AS213 Headquarters, USAISC
• AS4221 United States Department of Defense (DoD)
• AS393399 Sandia National Laboratories
• AS366 United States Department of Defense (DoD)
• AS5887 United States Department of Defense (DoD)
• AS6043 United States Department of Defense (DoD)
• AS5980 United States Department of Defense (DoD)

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS701 Verizon Business
• AS37 Navy Network Information Center (NNIC)
• AS518 United States Department of Defense (DoD)
• AS2914 NTT America, Inc.
• AS7575 Australian Academic and Research Network (AARNet)
• AS13 Headquarters, USAISC
• AS289 Headquarters, USAISC
• AS89 Navy Network Information Center (NNIC)
• AS22 Navy Network Information Center (NNIC)
• AS121 United States Department of Defense (DoD)
• AS84 Navy Network Information Center (NNIC)
• AS252 Headquarters, USAISC
• AS687 United States Department of Defense (DoD)
• AS5957 United States Department of Defense (DoD)
• AS2153 CENIC
• AS11537 Internet2
• AS293 ESnet
• AS228 United States Department of Defense (DoD)
• AS5132 United States Department of Defense (DoD)
• AS5978 United States Department of Defense (DoD)
• AS48 Navy Network Information Center (NNIC)
• AS2621 United States Department of Defense (DoD)
• AS5058 Navy Network Information Center (NNIC)
• AS213 Headquarters, USAISC

Internet exchanges

• Equinix Internet Exchange Ashburn — Ashburn, United States
• Seattle Internet Exchange — Seattle, United States
• Equinix Internet Exchange Chicago — Chicago, United States
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• Digital Realty Atlanta Internet Exchange — Atlanta, United States
• Equinix Internet Exchange Los Angeles — Los Angeles, United States
• Equinix Los Angeles IBX — Los Angeles, United States
• Equinix IBX Secaucus — Secaucus, United States