Autonomous System details

AS668

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

United States

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AS668 – United States Department of Defense (DoD)

Field	Value
Country	United States
Website	mail.mil
Hosted domains	23
IPv4 addresses	2,438,400
IPv6 addresses	79,228,162,514,264,338,000,000,000,000
ASN type	Government
Registry	arin
Allocated	36 years ago on Apr 24, 1990
Updated	7 months ago on Sep 12, 2025

Netblock	Company	Num of IPs
6.4.0.0/16	Headquarters, USAISC	65,536
128.132.0.0/16	Air Force Systems Networking	65,536
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	Navy Network Information Center (NNIC)	65,536
130.163.0.0/16	Navy Network Information Center (NNIC)	65,536
131.120.0.0/16	Navy Network Information Center (NNIC)	65,536
131.121.0.0/16	Navy Network Information Center (NNIC)	65,536
131.122.0.0/16	Navy Network Information Center (NNIC)	65,536
131.214.0.0/16	Air Force Systems Networking	65,536
131.218.0.0/16	Headquarters, USAISC	65,536
132.45.0.0/16	Air Force Systems Networking	65,536
132.193.0.0/16	Headquarters, USAISC	65,536
137.128.0.0/16	Headquarters, USAISC	65,536
140.6.0.0/16	DoD Network Information Center	65,536
140.25.0.0/16	DoD Network Information Center	65,536
140.31.0.0/16	DoD Network Information Center	65,536
140.32.0.0/16	DoD Network Information Center	65,536
140.178.0.0/16	Navy Network Information Center (NNIC)	65,536
143.56.0.0/16	DoD Network Information Center	65,536
144.3.0.0/16	Headquarters, USAISC	65,536
147.227.0.0/16	Headquarters, USAISC	65,536
150.125.0.0/16	Navy Network Information Center (NNIC)	65,536
155.141.0.0/16	Headquarters, USAISC	65,536
157.187.0.0/16	Navy Network Information Center (NNIC)	65,536
158.12.0.0/16	Headquarters, USAISC	65,536
163.240.0.0/16	Navy Network Information Center (NNIC)	65,536
164.49.0.0/16	Headquarters, USAISC	65,536
164.172.0.0/16	Headquarters, USAISC	65,536
164.173.0.0/16	Headquarters, USAISC	65,536
164.191.0.0/16	Navy Network Information Center (NNIC)	65,536
6.2.0.0/17	Headquarters, USAISC	32,768
6.3.0.0/17	Headquarters, USAISC	32,768
128.160.0.0/17	Navy Network Information Center (NNIC)	32,768
131.250.0.0/17	Navy Network Information Center (NNIC)	32,768
155.148.0.0/17	Headquarters, USAISC	32,768
6.2.0.0/18	Headquarters, USAISC	16,384
131.92.192.0/18	Headquarters, USAISC	16,384
131.250.128.0/18	Navy Network Information Center (NNIC)	16,384
134.166.0.0/18	Air Force Systems Networking	16,384
134.166.64.0/18	Air Force Systems Networking	16,384
147.241.192.0/18	Headquarters, USAISC	16,384
155.148.128.0/18	Headquarters, USAISC	16,384
6.2.64.0/19	Headquarters, USAISC	8,192
155.148.192.0/19	Headquarters, USAISC	8,192
198.14.32.0/19	Air Force Systems Networking	8,192
198.253.128.0/19	Navy Network Information Center (NNIC)	8,192
131.250.192.0/20	Navy Network Information Center (NNIC)	4,096
134.166.144.0/20	Air Force Systems Networking	4,096
147.248.48.0/20	Headquarters, USAISC	4,096
155.148.224.0/20	Headquarters, USAISC	4,096
164.122.0.0/20	Air Force Systems Networking	4,096
198.253.192.0/20	Navy Network Information Center (NNIC)	4,096
199.31.16.0/20	DoD Network Information Center	4,096
204.235.64.0/20	Headquarters, USAISC	4,096
131.92.136.0/21	Headquarters, USAISC	2,048
131.92.144.0/21	Headquarters, USAISC	2,048
131.92.168.0/21	Headquarters, USAISC	2,048
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
147.241.128.0/21	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
155.148.240.0/21	Headquarters, USAISC	2,048
198.154.16.0/21	Navy Network Information Center (NNIC)	2,048
198.253.40.0/21	Navy Network Information Center (NNIC)	2,048
198.253.64.0/21	Navy Network Information Center (NNIC)	2,048
198.253.168.0/21	Navy Network Information Center (NNIC)	2,048
199.208.32.0/21	DoD Network Information Center	2,048
199.209.144.0/21	DoD Network Information Center	2,048
199.209.240.0/21	DoD Network Information Center	2,048
199.209.248.0/21	DoD Network Information Center	2,048
204.222.64.0/21	DoD Network Information Center	2,048
214.9.96.0/21	DoD Network Information Center	2,048
214.29.136.0/21	DoD Network Information Center	2,048
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
131.92.132.0/22	Headquarters, USAISC	1,024
131.92.164.0/22	Headquarters, USAISC	1,024
131.92.176.0/22	Headquarters, USAISC	1,024
134.166.128.0/22	Air Force Systems Networking	1,024
140.27.8.0/22	DoD Network Information Center	1,024
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
147.241.120.0/22	Headquarters, USAISC	1,024
192.171.8.0/22	Navy Network Information Center (NNIC)	1,024
199.209.144.0/22	DoD Network Information Center	1,024
205.66.100.0/22	Navy Network Information Center (NNIC)	1,024
131.92.162.0/23	Headquarters, USAISC	512
131.92.180.0/23	Headquarters, USAISC	512
131.92.182.0/23	Headquarters, USAISC	512
131.92.184.0/23	Headquarters, USAISC	512
134.166.132.0/23	Air Force Systems Networking	512
134.166.136.0/23	Air Force Systems Networking	512
140.27.10.0/23	DoD Network Information Center	512
140.27.12.0/23	DoD Network Information Center	512
140.27.14.0/23	DoD Network Information Center	512
198.97.234.0/23	SPACE & NAVAL WARFARE SYSTEMS CENTER	512
198.154.24.0/23	NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION	512
198.154.174.0/23	Navy Network Information Center (NNIC)	512
198.154.176.0/23	Navy Network Information Center (NNIC)	512
199.123.86.0/23	Headquarters, USAISC	512
199.123.88.0/23	Headquarters, USAISC	512
199.209.150.0/23	DoD Network Information Center	512
204.44.136.0/23	DoD Network Information Center	512
204.222.6.0/23	DoD Network Information Center	512
204.222.8.0/23	DoD Network Information Center	512
206.37.28.0/23	DoD Network Information Center	512
206.37.30.0/23	DoD Network Information Center	512
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
131.92.131.0/24	Headquarters, USAISC	256
131.92.186.0/24	Headquarters, USAISC	256
134.164.220.0/24	Headquarters, USAISC	256
134.166.134.0/24	Air Force Systems Networking	256
134.166.135.0/24	Air Force Systems Networking	256
134.166.138.0/24	Air Force Systems Networking	256
140.25.98.0/24	DoD Network Information Center	256
147.241.118.0/24	Headquarters, USAISC	256
147.241.126.0/24	Headquarters, USAISC	256
192.5.17.0/24	Navy Network Information Center (NNIC)	256
192.5.21.0/24	Headquarters, USAISC	256
192.5.22.0/24	Headquarters, USAISC	256
192.5.23.0/24	Headquarters, USAISC	256
192.5.148.0/24	DoD Network Information Center	256
192.12.124.0/24	Headquarters, USAISC	256
192.16.167.0/24	DoD Network Information Center	256
192.31.147.0/24	Navy Network Information Center (NNIC)	256
192.42.141.0/24	Air Force Systems Networking	256
192.48.242.0/24	Headquarters, USAISC	256
192.55.117.0/24	Headquarters, USAISC	256
192.58.244.0/24	Harry Diamond Laboratories	256
192.67.80.0/24	Air Force Systems Networking	256
192.67.93.0/24	Air Force Systems Networking	256
192.86.66.0/24	Headquarters, USAISC	256
192.88.110.0/24	Headquarters, USAISC	256
192.100.92.0/24	Air Force Systems Networking	256
192.138.87.0/24	Navy Network Information Center (NNIC)	256
192.160.158.0/24	Navy Network Information Center (NNIC)	256
192.160.159.0/24	Navy Network Information Center (NNIC)	256
192.171.12.0/24	Navy Network Information Center (NNIC)	256
192.175.87.0/24	Air Force Systems Networking	256
192.190.228.0/24	Navy Network Information Center (NNIC)	256
192.190.229.0/24	Navy Network Information Center (NNIC)	256
198.97.236.0/24	Navy Network Information Center (NNIC)	256
198.154.173.0/24	Navy Network Information Center (NNIC)	256
198.253.56.0/24	Navy Network Information Center (NNIC)	256
198.253.110.0/24	Navy Network Information Center (NNIC)	256
198.253.252.0/24	Navy Network Information Center (NNIC)	256
198.253.253.0/24	Navy Network Information Center (NNIC)	256
199.9.0.0/24	Navy Network Information Center (NNIC)	256
199.9.1.0/24	Naval Research Laboratory, Marine	256
199.9.2.0/24	Navy Network Information Center (NNIC)	256
199.10.16.0/24	Navy Network Information Center (NNIC)	256
199.10.17.0/24	Navy Network Information Center (NNIC)	256
199.10.18.0/24	Navy Network Information Center (NNIC)	256
199.10.19.0/24	Navy Network Information Center (NNIC)	256
199.10.20.0/24	Navy Network Information Center (NNIC)	256
199.10.62.0/24	Navy Network Information Center (NNIC)	256
199.10.127.0/24	Navy Network Information Center (NNIC)	256
199.10.148.0/24	Navy Network Information Center (NNIC)	256
199.10.233.0/24	Navy Network Information Center (NNIC)	256
199.31.107.0/24	DoD Network Information Center	256
199.123.90.0/24	Headquarters, USAISC	256
199.123.105.0/24	DoD Network Information Center	256
199.123.113.0/24	DoD Network Information Center	256
199.208.158.0/24	DoD Network Information Center	256
199.209.149.0/24	DoD Network Information Center	256
204.238.129.0/24	Navy Network Information Center (NNIC)	256
205.67.232.0/24	Navy Network Information Center (NNIC)	256
205.68.95.0/24	Navy Network Information Center (NNIC)	256
205.111.251.0/24	Navy Network Information Center (NNIC)	256
205.111.252.0/24	Navy Network Information Center (NNIC)	256
206.37.224.0/24	DoD Network Information Center	256
206.37.252.0/24	DoD Network Information Center	256
207.132.147.0/24	DoD Network Information Center	256
207.133.211.0/24	DoD Network Information Center	256
214.4.136.0/24	DoD Network Information Center	256
214.9.92.0/24	DoD Network Information Center	256
214.9.94.0/24	DoD Network Information Center	256
214.9.95.0/24	DoD Network Information Center	256
214.10.25.0/24	DoD Network Information Center	256
214.27.178.0/24	DoD Network Information Center	256

Netblock	Company
2001:480::/32	High Performance Computing

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WHOIS Details

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                                                ASHandle:       AS668
                                                OrgID:          AS668
                                                ASName:         AS668
                                                ASNumber:       AS668
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 23 domain names hosted across 23 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
140.32.24.147	█████████	2
164.173.132.39	██████████	1
137.128.147.5	███████	1
140.27.14.47	██████████	1
6.3.22.26	█████████	1
6.3.3.2	██████████	1
131.92.251.50	██████████	1
140.6.184.2	██████████	1
140.178.211.157	██████████	1
198.253.153.81	██████████	1

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Hosted Domains API & Database

Peers

There are 48 peers for this ASN.

Peers	Name
AS10764	University of Illinois
AS11537	Internet2
AS121	United States Department of Defense (DoD)
AS13	Headquarters, USAISC
AS137409	GSL Networks Pty LTD
AS1508	Headquarters, USAISC
AS1828	Unitas Global
AS19035	Hawaii Internet Exchange
AS20253	Qwilt Inc.
AS213	Headquarters, USAISC
AS2153	CENIC
AS22	Navy Network Information Center (NNIC)
AS22335	Metropolitan Research and Education Network
AS228	United States Department of Defense (DoD)
AS23367	Adaptive Data Networks, LLC
AS252	Headquarters, USAISC
AS2621	United States Department of Defense (DoD)
AS289	Headquarters, USAISC
AS2914	NTT America, Inc.
AS293	ESnet
AS3381	Maui High Performance Computing Center
AS36236	NetActuate, Inc
AS366	United States Department of Defense (DoD)
AS37	Navy Network Information Center (NNIC)
AS393399	Sandia National Laboratories
AS40300	DR Fortress, LLC
AS4181	TDS TELECOM
AS4221	United States Department of Defense (DoD)
AS48	Navy Network Information Center (NNIC)
AS49544	i3D.net B.V
AS5058	Navy Network Information Center (NNIC)
AS5132	United States Department of Defense (DoD)
AS518	United States Department of Defense (DoD)
AS53828	NETWORK INNOVATIONS, LLC
AS5887	United States Department of Defense (DoD)
AS5957	United States Department of Defense (DoD)
AS5978	United States Department of Defense (DoD)
AS5980	United States Department of Defense (DoD)
AS6009	United States Department of Defense (DoD)
AS6043	United States Department of Defense (DoD)
AS6082	IPiFony Systems, Inc.
AS6360	University of Hawaii
AS687	United States Department of Defense (DoD)
AS6939	Hurricane Electric LLC
AS701	Verizon Business
AS7575	Australian Academic and Research Network (AARNet)
AS84	Navy Network Information Center (NNIC)
AS89	Navy Network Information Center (NNIC)

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ASN API & Database

Upstreams

There are 3 upstreams for this ASN.

upstreams	Name
AS2914	NTT America, Inc.
AS6939	Hurricane Electric LLC
AS701	Verizon Business

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ASN API & Database

Downstreams

There are 27 downstreams for this ASN.

Downstreams	Name
AS121	United States Department of Defense (DoD)
AS13	Headquarters, USAISC
AS1508	Headquarters, USAISC
AS213	Headquarters, USAISC
AS22	Navy Network Information Center (NNIC)
AS228	United States Department of Defense (DoD)
AS252	Headquarters, USAISC
AS2621	United States Department of Defense (DoD)
AS289	Headquarters, USAISC
AS3381	Maui High Performance Computing Center
AS366	United States Department of Defense (DoD)
AS37	Navy Network Information Center (NNIC)
AS393399	Sandia National Laboratories
AS4221	United States Department of Defense (DoD)
AS48	Navy Network Information Center (NNIC)
AS5058	Navy Network Information Center (NNIC)
AS5132	United States Department of Defense (DoD)
AS518	United States Department of Defense (DoD)
AS5887	United States Department of Defense (DoD)
AS5957	United States Department of Defense (DoD)
AS5978	United States Department of Defense (DoD)
AS5980	United States Department of Defense (DoD)
AS6009	United States Department of Defense (DoD)
AS6043	United States Department of Defense (DoD)
AS687	United States Department of Defense (DoD)
AS84	Navy Network Information Center (NNIC)
AS89	Navy Network Information Center (NNIC)

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ASN API & Database

Pingable IPs

47 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
214.10.25.3	AS668 United States Department of Defense (DoD)	`12.57ms` from Ashburn, US
2001:480:e:249f::250	AS668 United States Department of Defense (DoD)	`0.28ms` from Ashburn, US
130.109.1.1	AS668 United States Department of Defense (DoD)	`13.44ms` from Atlanta, US
143.56.241.250	AS668 United States Department of Defense (DoD)	`24.02ms` from Los Angeles, US
2001:480:185::2	AS668 United States Department of Defense (DoD)	`9.67ms` from Atlanta, US
140.27.10.35	AS668 United States Department of Defense (DoD)	`6.05ms` from Los Angeles, US
147.241.199.12	AS668 United States Department of Defense (DoD)	`50.71ms` from Chicago, US
140.32.216.167	AS668 United States Department of Defense (DoD)	`10.60ms` from Chicago, US
143.56.1.1	AS668 United States Department of Defense (DoD)	`2.23ms` from Los Angeles, US
140.32.91.233	AS668 United States Department of Defense (DoD)	`15.77ms` from Ashburn, US
143.56.3.161	AS668 United States Department of Defense (DoD)	`3.28ms` from Ashburn, US
140.27.14.65	AS668 United States Department of Defense (DoD)	`0.56ms` from Ashburn, US
192.12.124.18	AS668 United States Department of Defense (DoD)	`8.75ms` from Ashburn, US
143.56.248.250	AS668 United States Department of Defense (DoD)	`0.70ms` from Atlanta, US
140.27.12.48	AS668 United States Department of Defense (DoD)	`0.90ms` from Honolulu, US
147.241.96.254	AS668 United States Department of Defense (DoD)	`15.35ms` from Los Angeles, US
129.229.107.1	AS668 United States Department of Defense (DoD)	`13.77ms` from Chicago, US
131.218.136.2	AS668 United States Department of Defense (DoD)	`12.49ms` from Ashburn, US
199.209.145.13	AS668 United States Department of Defense (DoD)	`6.57ms` from Atlanta, US
199.123.113.10	AS668 United States Department of Defense (DoD)	`7.06ms` from Atlanta, US
143.56.16.49	AS668 United States Department of Defense (DoD)	`1.54ms` from Honolulu, US
140.32.134.98	AS668 United States Department of Defense (DoD)	`9.53ms` from Atlanta, US
140.32.72.82	AS668 United States Department of Defense (DoD)	`30.44ms` from Chicago, US
2001:480:190:107::1	AS668 United States Department of Defense (DoD)	`13.77ms` from Chicago, US
199.123.105.10	AS668 United States Department of Defense (DoD)	`47.71ms` from Chicago, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
51.15.76.156	AS12876 Scaleway SAS	`0.31ms` from Amsterdam, NL
164.111.166.252	AS3452 University of Alabama at Birmingham	`3.40ms` from Atlanta, US
118.210.103.252	AS7545 TPG Telecom Limited	`2.02ms` from Brisbane, AU
216.38.201.188	AS13649 Flexential Colorado Corp.	`8.46ms` from Chicago, US
54.46.24.204	AS16509 Amazon.com, Inc.	`0.11ms` from Hong Kong, HK
23.141.172.92	AS979 NetLab Global	`0.38ms` from Hong Kong, HK
120.148.138.92	AS1221 Telstra Limited	`1.71ms` from Melbourne, AU
107.212.19.60	AS7018 AT&T Enterprises, LLC	`11.64ms` from Miami, US
68.204.119.172	AS33363 Charter Communications, Inc	`10.55ms` from Orlando, US
78.197.106.92	AS12322 Free SAS	`6.35ms` from Paris, FR
70.234.195.204	AS7018 AT&T Enterprises, LLC	`7.36ms` from San Antonio, US
126.108.209.60	AS17676 SoftBank Corp.	`7.45ms` from Tokyo, JP
189.61.113.220	AS28573 Claro NXT Telecomunicacoes Ltda	`7.93ms` from Brasilia, BR
78.23.197.60	AS6848 Telenet BV	`7.07ms` from Brussels, BE
175.18.227.108	AS4837 CHINA UNICOM China169 Backbone	`7.40ms` from Changchun, CN
47.186.124.76	AS5650 Frontier Communications of America, Inc.	`2.37ms` from Dallas, US
203.190.15.140	AS58768 Daffodil Online Ltd.	`0.38ms` from Dhaka, BD
217.83.176.252	AS3320 Deutsche Telekom AG	`3.10ms` from Duesseldorf, DE
180.229.172.12	AS17858 LG POWERCOMM	`1.82ms` from Incheon, KR
180.69.194.140	AS9318 SK Broadband Co Ltd	`1.88ms` from Incheon, KR
114.203.211.220	AS9318 SK Broadband Co Ltd	`0.97ms` from Incheon, KR
216.249.91.252	AS11550 Smithville Digital, LLC	`3.45ms` from Indianapolis, US
180.72.51.140	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`6.51ms` from Kuala Lumpur, MY
103.139.109.12	AS45259 Bruhaas (B) Sdn Bhd	`0.44ms` from Sepang, MY
218.79.79.12	AS4812 China Telecom (Group)	`4.06ms` from Shanghai, CN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -m5 143.56.6.189

traceroute to 143.56.6.189 (143.56.6.189): 5 hops max, 52 byte packets

1 [AS31898] 140.91.242.14 0.068 ms

2 [AS15802] 91.74.125.170 0.48 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Abu Dhabi, AE

On April 13th 2026

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS668 at robtex.

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