AS number details

AS138

United States Department of Defense (DoD)  ·  unitedrdc.com

United States

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AS138 – United States Department of Defense (DoD)

Field Value
Country United States
Website unitedrdc.com
Hosted domains 0
Number of IPv4 236,288
Number of IPv6 0
ASN type Government
Registry arin
Allocated 38 years ago on Nov 11, 1987
Updated 8 days ago on Sep 12, 2025

IP Ranges

Netblock Company Num of IPs
131.66.0.0/16 DoD Network Information Center 65,536
131.67.0.0/16 DoD Network Information Center 65,536
131.68.0.0/16 DoD Network Information Center 65,536
141.234.0.0/18 DoD Network Information Center 16,384
141.234.64.0/18 DoD Network Information Center 16,384
144.183.200.0/21 DoD Network Information Center 2,048
144.183.196.0/22 DoD Network Information Center 1,024
144.183.32.0/22 DoD Network Information Center 1,024
144.183.128.0/23 DoD Network Information Center 512
144.183.127.0/24 DoD Network Information Center 256
144.183.130.0/24 DoD Network Information Center 256
144.183.131.0/24 DoD Network Information Center 256
144.183.15.0/24 DoD Network Information Center 256
144.183.16.0/24 DoD Network Information Center 256
144.183.17.0/24 DoD Network Information Center 256
144.183.20.0/24 DoD Network Information Center 256
144.183.216.0/24 DoD Network Information Center 256
144.183.227.0/24 DoD Network Information Center 256

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS138
                                                OrgID:          AS138
                                                ASName:         AS138
                                                ASNumber:       AS138
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are no domains currently hosted on this ASN.

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Peers

There is 1 peer for this ASN.

Peers Name
AS27064 United States Department of Defense (DoD)
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Upstreams

There is 1 peer for this ASN.

upstreams Name
AS27064 United States Department of Defense (DoD)
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Downstreams

There are no downstreams for this ASN.

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ASN API ASN Database Download

Pingable IPs

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

IP Address ASN Details
144.183.130.117 AS138 United States Department of Defense (DoD) 10.02ms from Dallas, US
144.183.129.10 AS138 United States Department of Defense (DoD) 11.01ms 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
65.194.66.218 AS701 Verizon Business 4.99ms from Atlanta, US
160.44.203.26 AS6878 T-Systems International GmbH 2.49ms from Berlin, DE
34.38.17.74 AS396982 Google LLC 0.16ms from Brussels, BE
163.19.190.106 AS1659 Taiwan Academic Network (TANet) Information Center 6.72ms from Chang-hua, TW
32.44.22.10 AS7018 AT&T Enterprises, LLC 8.85ms from Chicago, US
20.203.85.250 AS8075 Microsoft Corporation 0.92ms from Dubai, AE
109.56.131.42 AS44034 Hi3G Access AB 9.66ms from Falkenberg, SE
35.156.54.138 AS16509 Amazon.com, Inc. 0.27ms from Frankfurt am Main, DE
36.25.46.186 AS4134 CHINANET-BACKBONE 8.16ms from Hangzhou, CN
38.152.173.170 AS36352 HostPapa 0.24ms from Los Angeles, US
83.52.130.58 AS3352 TELEFONICA DE ESPANA S.A.U. 5.25ms from Madrid, ES
151.67.76.154 AS1267 WIND TRE S.P.A. 4.53ms from Milan, IT
79.54.121.154 AS3269 Telecom Italia S.p.A. 4.22ms from Milan, IT
36.4.110.58 AS4134 CHINANET-BACKBONE 12.77ms from Nanchang, CN
67.246.18.202 AS11351 Charter Communications Inc 12.26ms from New York City, US
75.169.130.74 AS209 CenturyLink Communications, LLC 2.74ms from Salt Lake City, US
73.15.1.74 AS7922 Comcast Cable Communications, LLC 5.62ms from San Jose, US
14.41.125.138 AS4766 Korea Telecom 4.27ms from Seoul, KR
210.99.221.138 AS4766 Korea Telecom 1.54ms from Seoul, KR
202.104.143.154 AS4134 CHINANET-BACKBONE 2.59ms from Shenzhen, CN
111.220.43.234 AS9443 Vocus Retail 1.47ms from Sydney, AU
94.240.207.202 AS16010 Magticom Ltd. 0.74ms from Tbilisi, GE
36.112.1.74 AS4847 China Networks Inter-Exchange 3.84ms from Tianjin, CN
133.238.89.58 AS131958 Tama Cable Network Co.,Ltd. 9.72ms from Tokyo, JP
194.223.100.106 AS138384 Rakuten Mobile Network, Inc. 3.01ms from Tokyo, JP

Traceroute

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

$
traceroute -a -n -q1 -f3 -m10 131.66.54.58
traceroute to 131.66.54.58 (131.66.54.58): 10 hops max, 52 byte packets
3 [AS3257] 213.39.2.65 0.25 ms
4 *
5 *
6 *
7 [AS3356] 65.56.131.54 109.693 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
On

Related Networks

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 AS138 at robtex.

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