Autonomous System details

AS1637

Headquarters, USAISC · mail.mil

United States

Stub AS

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AS1637 – Headquarters, USAISC

Field	Value
Country	United States
Website	mail.mil
Hosted domains	0
IPv4 addresses	200,448
IPv6 addresses	1,208,925,819,614,629,174,706,176
ASN type	Government
Registry	arin
Allocated	22 years ago on May 12, 2004
Updated	14 years ago on Aug 24, 2011

Netblock	Company	Num of IPs
143.46.0.0/16	Headquarters, USAISC	65,536
155.5.0.0/16	Headquarters, USAISC	65,536
155.6.0.0/16	Headquarters, USAISC	65,536
143.68.152.0/21	Headquarters, USAISC	2,048
6.134.24.0/22	Headquarters, USAISC	1,024
143.46.116.0/22	Headquarters, USAISC	1,024
143.46.120.0/22	Headquarters, USAISC	1,024
143.46.164.0/22	Headquarters, USAISC	1,024
143.46.8.0/23	Headquarters, USAISC	512
143.46.128.0/23	Headquarters, USAISC	512
143.46.130.0/23	Headquarters, USAISC	512
143.46.134.0/23	Headquarters, USAISC	512
155.5.122.0/23	Headquarters, USAISC	512
155.5.142.0/23	Headquarters, USAISC	512
155.5.152.0/23	Headquarters, USAISC	512
6.16.88.0/24	Headquarters, USAISC	256
6.16.89.0/24	Headquarters, USAISC	256
143.46.5.0/24	Headquarters, USAISC	256
143.46.10.0/24	Headquarters, USAISC	256
143.46.11.0/24	Headquarters, USAISC	256
143.46.12.0/24	Headquarters, USAISC	256
143.46.17.0/24	Headquarters, USAISC	256
143.46.18.0/24	Headquarters, USAISC	256
143.46.20.0/24	Headquarters, USAISC	256
143.46.21.0/24	Headquarters, USAISC	256
143.46.22.0/24	Headquarters, USAISC	256
143.46.23.0/24	Headquarters, USAISC	256
143.46.24.0/24	Headquarters, USAISC	256
143.46.25.0/24	Headquarters, USAISC	256
143.46.26.0/24	Headquarters, USAISC	256
143.46.27.0/24	Headquarters, USAISC	256
143.46.32.0/24	Headquarters, USAISC	256
143.46.33.0/24	Headquarters, USAISC	256
143.46.34.0/24	Headquarters, USAISC	256
143.46.35.0/24	Headquarters, USAISC	256
143.46.36.0/24	Headquarters, USAISC	256
143.46.37.0/24	Headquarters, USAISC	256
143.46.39.0/24	Headquarters, USAISC	256
143.46.48.0/24	Headquarters, USAISC	256
143.46.49.0/24	Headquarters, USAISC	256
143.46.50.0/24	Headquarters, USAISC	256
143.46.51.0/24	Headquarters, USAISC	256
143.46.53.0/24	Headquarters, USAISC	256
143.46.60.0/24	Headquarters, USAISC	256
143.46.110.0/24	Headquarters, USAISC	256
143.46.140.0/24	Headquarters, USAISC	256
143.46.141.0/24	Headquarters, USAISC	256
143.46.142.0/24	Headquarters, USAISC	256
143.46.143.0/24	Headquarters, USAISC	256
143.46.144.0/24	Headquarters, USAISC	256
143.46.145.0/24	Headquarters, USAISC	256
143.46.146.0/24	Headquarters, USAISC	256
143.46.147.0/24	Headquarters, USAISC	256
143.46.150.0/24	Headquarters, USAISC	256
143.46.151.0/24	Headquarters, USAISC	256
143.46.158.0/24	Headquarters, USAISC	256
143.46.161.0/24	Headquarters, USAISC	256
143.46.168.0/24	Headquarters, USAISC	256
143.46.169.0/24	Headquarters, USAISC	256
143.46.170.0/24	Headquarters, USAISC	256
143.46.190.0/24	Headquarters, USAISC	256
143.46.193.0/24	Headquarters, USAISC	256
143.46.196.0/24	Headquarters, USAISC	256
143.46.210.0/24	Headquarters, USAISC	256
143.46.229.0/24	Headquarters, USAISC	256
143.46.240.0/24	Headquarters, USAISC	256
143.46.253.0/24	Headquarters, USAISC	256
147.248.24.0/24	Headquarters, USAISC	256
155.5.17.0/24	Headquarters, USAISC	256
155.5.18.0/24	Headquarters, USAISC	256
155.5.20.0/24	Headquarters, USAISC	256
155.5.21.0/24	Headquarters, USAISC	256
155.5.32.0/24	Headquarters, USAISC	256
155.5.33.0/24	Headquarters, USAISC	256
155.5.35.0/24	Headquarters, USAISC	256
155.5.48.0/24	Headquarters, USAISC	256
155.5.49.0/24	Headquarters, USAISC	256
155.5.106.0/24	Headquarters, USAISC	256
155.5.116.0/24	Headquarters, USAISC	256
155.6.20.0/24	Headquarters, USAISC	256
155.6.21.0/24	Headquarters, USAISC	256
155.6.22.0/24	Headquarters, USAISC	256
155.6.23.0/24	Headquarters, USAISC	256
155.6.24.0/24	Headquarters, USAISC	256
155.6.25.0/24	Headquarters, USAISC	256
155.6.26.0/24	Headquarters, USAISC	256
155.6.27.0/24	Headquarters, USAISC	256
155.6.28.0/24	Headquarters, USAISC	256
155.6.29.0/24	Headquarters, USAISC	256
155.6.30.0/24	Headquarters, USAISC	256
155.6.31.0/24	Headquarters, USAISC	256
155.6.32.0/24	Headquarters, USAISC	256
155.6.33.0/24	Headquarters, USAISC	256
155.6.35.0/24	Headquarters, USAISC	256
155.6.37.0/24	Headquarters, USAISC	256
155.6.39.0/24	Headquarters, USAISC	256
155.6.40.0/24	Headquarters, USAISC	256
155.6.41.0/24	Headquarters, USAISC	256
155.6.42.0/24	Headquarters, USAISC	256
155.6.48.0/24	Headquarters, USAISC	256
155.6.51.0/24	Headquarters, USAISC	256
155.6.53.0/24	Headquarters, USAISC	256
155.6.56.0/24	Headquarters, USAISC	256
155.6.57.0/24	Headquarters, USAISC	256
155.6.58.0/24	Headquarters, USAISC	256
155.6.90.0/24	Headquarters, USAISC	256
155.6.98.0/24	Headquarters, USAISC	256
155.6.100.0/24	Headquarters, USAISC	256
155.6.194.0/24	Headquarters, USAISC	256
155.6.200.0/24	Headquarters, USAISC	256
155.6.210.0/24	Headquarters, USAISC	256
155.6.216.0/24	Headquarters, USAISC	256
155.6.217.0/24	Headquarters, USAISC	256
155.6.218.0/24	Headquarters, USAISC	256
155.6.219.0/24	Headquarters, USAISC	256
155.6.220.0/24	Headquarters, USAISC	256
155.6.240.0/24	Headquarters, USAISC	256
155.6.243.0/24	Headquarters, USAISC	256

Netblock	Company
2608:c141:30::/48	United States Department of Defense (DoD)

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WHOIS Details

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                                                ASHandle:       AS1637
                                                OrgID:          AS1637
                                                ASName:         AS1637
                                                ASNumber:       AS1637
                                                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
AS27066	United States Department of Defense (DoD)

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Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS27066	United States Department of Defense (DoD)

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Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

No IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

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
189.91.172.5	AS271300 LOGIN PROVEDOR DE INTERNET LTDA	`1.95ms` from Brasília, BR
75.185.141.181	AS10796 Charter Communications Inc	`17.93ms` from Columbus, US
76.210.119.197	AS7018 AT&T Enterprises, LLC	`7.41ms` from Columbus, US
177.84.75.181	AS52719 ESPECTRO Gall Ltda	`17.16ms` from Curitiba, BR
72.203.149.133	AS22773 Cox Communications Inc.	`15.70ms` from Dallas, US
122.180.96.229	AS9498 BHARTI Airtel Ltd.	`1.27ms` from Delhi, IN
91.32.225.229	AS3320 Deutsche Telekom AG	`1.89ms` from Hamburg, DE
87.167.75.133	AS3320 Deutsche Telekom AG	`1.80ms` from Hamburg, DE
175.147.215.5	AS4837 CHINA UNICOM China169 Backbone	`9.54ms` from Liaoyang, CN
47.155.56.69	AS5650 Frontier Communications of America, Inc.	`1.79ms` from Los Angeles, US
79.145.73.165	AS3352 TELEFONICA DE ESPANA S.A.U.	`14.04ms` from Madrid, ES
72.43.250.37	AS11351 Charter Communications Inc	`9.43ms` from New York City, US
51.143.7.181	AS8075 Microsoft Corporation	`0.28ms` from Quincy, US
170.106.148.213	AS132203 Tencent Building, Kejizhongyi Avenue	`0.24ms` from San Jose, US
23.19.197.53	AS28753 Leaseweb Deutschland GmbH	`0.13ms` from San Jose, US
220.248.82.197	AS17621 China Unicom Shanghai network	`2.52ms` from Shanghai, CN
85.187.129.21	AS55293 A2 Hosting, Inc.	`0.26ms` from Singapore, SG
54.92.88.133	AS16509 Amazon.com, Inc.	`0.21ms` from Tokyo, JP
124.209.38.101	AS2516 KDDI CORPORATION	`0.87ms` from Tokyo, JP
42.229.237.149	AS4837 CHINA UNICOM China169 Backbone	`7.07ms` from Zhengzhou, CN
87.66.228.101	AS5432 Proximus NV	`2.57ms` from Brussels, BE
182.128.116.21	AS4134 CHINANET-BACKBONE	`11.24ms` from Chengdu, CN
179.105.33.245	AS28573 Claro NXT Telecomunicacoes Ltda	`11.35ms` from Curitiba, BR
66.185.121.245	AS42 WoodyNet, Inc.	`0.22ms` from Dublin, IE
58.218.63.133	AS4134 CHINANET-BACKBONE	`8.60ms` from Huai'an, CN

Traceroute

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

traceroute -a -n -q1 -f2 -m6 143.46.17.228

traceroute to 143.46.17.228 (143.46.17.228): 6 hops max, 52 byte packets

2 [AS262191] 8.243.170.105 1.778 ms

3 [AS3356] 4.69.219.222 212.787 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Bogota, CO

On December 28th 2025

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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 AS1637 at robtex.

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