AS number details

AS366

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

United States

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AS366 – United States Department of Defense (DoD)

Field Value
Country United States
Website mail.mil
Hosted domains 0
Number of IPv4 6,400
Number of IPv6 620,178,945,462,304,766,624,268,288
ASN type Government
Registry arin
Allocated 36 years ago on Jun 30, 1989
Updated 2 months ago on Sep 12, 2025

IP Ranges

Netblock Company Num of IPs
55.82.132.0/22 Headquarters, USAISC 1,024
55.82.136.0/22 Headquarters, USAISC 1,024
55.82.148.0/22 Headquarters, USAISC 1,024
55.82.146.0/23 Headquarters, USAISC 512
55.82.5.0/24 Headquarters, USAISC 256
55.82.10.0/24 Headquarters, USAISC 256
55.82.20.0/24 Headquarters, USAISC 256
55.82.53.0/24 Headquarters, USAISC 256
55.82.128.0/24 Headquarters, USAISC 256
55.82.129.0/24 Headquarters, USAISC 256
55.82.160.0/24 Headquarters, USAISC 256
55.82.200.0/24 Headquarters, USAISC 256
55.82.234.0/24 Headquarters, USAISC 256
55.82.245.0/24 Headquarters, USAISC 256
55.82.253.0/24 Headquarters, USAISC 256

Netblock Company
2608:10a:3600::/40 United States Department of Defense (DoD)
2608:10b:3800::/40 United States Department of Defense (DoD)
2001:480:280::/48 High Performance Computing
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WHOIS Details

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                                                ASHandle:       AS366
                                                OrgID:          AS366
                                                ASName:         AS366
                                                ASNumber:       AS366
                                                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 are 2 peers for this ASN.

Peers Name
AS306 United States Department of Defense (DoD)
AS668 United States Department of Defense (DoD)
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ASN API & Database

Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS306 United States Department of Defense (DoD)
AS668 United States Department of Defense (DoD)
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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

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

IP Address ASN Details
2001:480:280:dddd::246:33 AS366 United States Department of Defense (DoD) 11.15ms 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
186.168.148.254 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 8.96ms from Bogota, CO
71.221.95.254 AS19901 Brightspeed 8.26ms from Dallas, US
166.147.73.30 AS20057 AT&T Enterprises, LLC 1.96ms from Dallas, US
135.119.28.254 AS8075 Microsoft Corporation 0.17ms from Des Moines, US
219.79.244.254 AS4760 HKT Limited 0.93ms from Hong Kong, HK
90.69.73.254 AS12479 Orange Espagne SA 9.73ms from Madrid, ES
112.208.2.174 AS9299 Philippine Long Distance Telephone Company 4.18ms from Manila, PH
81.73.123.254 AS3269 Telecom Italia S.p.A. 4.74ms from Milan, IT
184.97.21.254 AS19901 Brightspeed 2.81ms from Minneapolis, US
219.75.214.78 AS17511 OPTAGE Inc. 1.02ms from Osaka, JP
113.158.40.30 AS2516 KDDI CORPORATION 8.89ms from Osaka, JP
50.255.30.206 AS7922 Comcast Cable Communications, LLC 6.10ms from San Jose, US
122.33.106.190 AS17858 LG POWERCOMM 1.84ms from Seoul, KR
182.235.140.254 AS9416 Hoshin Multimedia Center Inc. 5.06ms from Taipei, TW
97.111.179.94 AS812 Rogers Communications Canada Inc. 13.96ms from Toronto, CA
188.210.121.222 AS58224 Iran Telecommunication Company PJS 17.15ms from Yerevan, AM
97.98.187.14 AS11427 Charter Communications Inc 19.63ms from Dallas, US
221.4.130.206 AS17816 China Unicom IP network China169 Guangdong province 3.13ms from Guangzhou, CN
84.20.130.222 AS29422 Telia Cygate Oy 0.94ms from Helsinki, FI
174.25.63.254 AS209 CenturyLink Communications, LLC 0.77ms from Hillsboro, US
45.231.104.206 AS263689 Telecable Central, S.A. 17.70ms from Miami, US
46.8.94.78 AS60931 LAN-Service Ltd. 5.34ms from Moscow, RU
115.148.239.14 AS4134 CHINANET-BACKBONE 0.47ms from Nanchang, CN
131.125.11.254 AS174 Cogent Communications, LLC 0.43ms from New York City, US
109.105.88.14 AS33894 MTS PJSC 9.71ms from Novosibirsk, RU

Traceroute

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

$
traceroute -a -n -q1 -m8 55.82.148.82
traceroute to 55.82.148.82 (55.82.148.82): 8 hops max, 52 byte packets
2 *
3 *
4 *
5 [AS3356] 4.68.75.125 11.811 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Bucharest, RO
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 AS366 at robtex.

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