Autonomous System details

AS668

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

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AS668 – United States Department of Defense (DoD)

Field	Value
Country	United States
Website	mail.mil
Hosted domains	24
IPv4 addresses	2,642,176
IPv6 addresses	79,228,162,514,264,337,593,543,950,336
ASN type	Government
Registry	arin
Allocated	36 years ago on Apr 24, 1990
Updated	4 months ago on Sep 12, 2025

Netblock	Company	Num of IPs
6.14.0.0/15	Headquarters, USAISC	131,072
6.4.0.0/16	Headquarters, USAISC	65,536
6.11.0.0/16	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
155.244.0.0/16	Air Force Systems Networking	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
164.191.0.0/16	Navy Network Information Center (NNIC)	65,536
6.2.0.0/17	Headquarters, USAISC	32,768
6.6.128.0/17	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
6.3.0.0/18	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
6.5.0.0/19	Headquarters, USAISC	8,192
144.252.64.0/19	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
6.6.16.0/20	Headquarters, USAISC	4,096
6.6.32.0/20	Headquarters, USAISC	4,096
6.6.48.0/20	Headquarters, USAISC	4,096
6.6.64.0/20	Headquarters, USAISC	4,096
6.6.80.0/20	Headquarters, USAISC	4,096
6.6.96.0/20	Headquarters, USAISC	4,096
6.6.112.0/20	Headquarters, USAISC	4,096
6.8.0.0/20	Headquarters, USAISC	4,096
6.9.0.0/20	Headquarters, USAISC	4,096
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
6.6.8.0/21	Headquarters, USAISC	2,048
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
6.6.0.0/22	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
6.6.4.0/24	Headquarters, USAISC	256
6.6.5.0/24	Headquarters, USAISC	256
6.6.7.0/24	Headquarters, USAISC	256
6.7.0.0/24	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
214.38.133.0/24	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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IP WHOIS API & Database

Hosted Domains

There are 24 domain names hosted across 24 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
140.32.24.147	██████████	2
6.3.22.26	█████████	1
6.5.4.0	██████████	1
6.9.6.9	██████████	1
6.3.5.252	██████████	1
6.3.4.4	██████████	1
140.27.14.47	██████████	1
6.6.44.4	██████████	1
140.27.14.26	███████	1
6.3.3.2	██████████	1

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Hosted Domains API & Database

Peers

There are 47 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
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

9,164 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
131.218.233.66	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
157.187.109.232	AS668 United States Department of Defense (DoD)	`2.72ms` from Ashburn, US
128.132.86.232	AS668 United States Department of Defense (DoD)	`2.64ms` from Ashburn, US
131.218.165.240	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
131.250.193.224	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
158.12.217.186	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
131.214.230.94	AS668 United States Department of Defense (DoD)	`2.65ms` from Ashburn, US
144.3.161.90	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
131.92.167.189	AS668 United States Department of Defense (DoD)	`2.67ms` from Ashburn, US
144.3.91.218	AS668 United States Department of Defense (DoD)	`2.71ms` from Ashburn, US
131.218.222.228	AS668 United States Department of Defense (DoD)	`2.73ms` from Ashburn, US
131.122.185.20	AS668 United States Department of Defense (DoD)	`2.66ms` from Ashburn, US
131.121.234.39	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
158.12.12.39	AS668 United States Department of Defense (DoD)	`2.64ms` from Ashburn, US
131.214.204.163	AS668 United States Department of Defense (DoD)	`2.65ms` from Ashburn, US
131.122.238.239	AS668 United States Department of Defense (DoD)	`2.68ms` from Ashburn, US
131.122.204.36	AS668 United States Department of Defense (DoD)	`2.67ms` from Ashburn, US
144.3.61.26	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
140.31.84.115	AS668 United States Department of Defense (DoD)	`2.64ms` from Ashburn, US
131.122.55.10	AS668 United States Department of Defense (DoD)	`2.71ms` from Ashburn, US
204.222.65.218	AS668 United States Department of Defense (DoD)	`2.75ms` from Ashburn, US
140.32.52.110	AS668 United States Department of Defense (DoD)	`2.70ms` from Ashburn, US
131.250.169.28	AS668 United States Department of Defense (DoD)	`2.68ms` from Ashburn, US
131.214.76.184	AS668 United States Department of Defense (DoD)	`2.69ms` from Ashburn, US
158.12.172.47	AS668 United States Department of Defense (DoD)	`2.70ms` from Ashburn, 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
20.124.116.188	AS8075 Microsoft Corporation	`0.34ms` from Ashburn, US
87.138.112.236	AS3320 Deutsche Telekom AG	`2.89ms` from Berlin, DE
16.145.9.188	AS16509 Amazon.com, Inc.	`0.51ms` from Boardman, US
99.62.168.44	AS7018 AT&T Enterprises, LLC	`8.99ms` from Dallas, US
180.244.199.60	AS7713 PT Telekomunikasi Indonesia	`6.40ms` from Jakarta, ID
13.43.229.188	AS16509 Amazon.com, Inc.	`0.15ms` from London, GB
84.121.213.140	AS6739 VODAFONE ONO, S.A.	`9.59ms` from Madrid, ES
173.21.218.236	AS30036 Mediacom Communications Corp	`14.03ms` from Minneapolis, US
223.83.203.44	AS56045 China Mobile communications corporation	`7.44ms` from Nanchang, CN
112.171.22.188	AS4766 Korea Telecom	`1.03ms` from Seoul, KR
221.162.113.172	AS4766 Korea Telecom	`1.34ms` from Seoul, KR
169.211.207.76	AS4766 Korea Telecom	`1.32ms` from Seoul, KR
123.121.129.220	AS4808 China Unicom Beijing Province Network	`3.60ms` from Beijing, CN
125.66.169.28	AS4134 CHINANET-BACKBONE	`7.53ms` from Chengdu, CN
24.165.211.28	AS10796 Charter Communications Inc	`5.84ms` from Cleveland, US
91.63.215.204	AS3320 Deutsche Telekom AG	`6.79ms` from Frankfurt am Main, DE
120.233.253.92	AS56040 China Mobile communications corporation	`4.84ms` from Guangzhou, CN
136.32.8.92	AS16591 Google Fiber Inc.	`0.78ms` from Kansas City, US
82.68.166.12	AS13037 Zen Internet Ltd	`6.90ms` from London, GB
216.96.80.76	AS7029 Windstream Communications LLC	`0.23ms` from Miami, US
216.183.34.220	AS17293 VTX Communications LLC	`4.68ms` from Monterrey, MX
209.122.223.44	AS6079 RCN	`3.63ms` from New York City, US
24.0.146.108	AS7922 Comcast Cable Communications, LLC	`6.53ms` from New York City, US
202.61.255.60	AS197540 netcup GmbH	`0.40ms` from Nuernberg, DE
44.217.85.92	AS14618 Amazon.com, Inc.	`0.24ms` from Reston, US

Traceroute

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

traceroute -a -n -q1 -m5 155.244.5.46

traceroute to 155.244.5.46 (155.244.5.46): 5 hops max, 52 byte packets

1 [AS202422] 185.101.139.2 0.291 ms

2 [AS199524] 92.223.126.129 0.119 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Amsterdam, NL

On January 19th 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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