ASN Lookup Tool

Headquarters, USAISC mail.mil US US 121 Routes

AS Data

AS1637

AS1637 – Headquarters, USAISC

AS Number 1637
AS Name DNIC-AS-01637
Organization Headquarters, USAISC(headqu-3)
Country US
Website mail.mil
Number of IPv4 Routes 120
Number of IPv6 Routes 1
ASN type GOVERNMENT
Registry ARIN
Date Allocated 2004-05-12

ASN Intelligence API for production workflows

Use ASN data for AS1637 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
155.6.33.0/24 256
143.46.50.0/24 256
143.46.164.0/22 1024
143.46.39.0/24 256
143.46.20.0/24 256
155.5.152.0/23 512
155.6.42.0/24 256
155.6.216.0/24 256
155.6.243.0/24 256
143.46.11.0/24 256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       1637
ASName:         DNIC-AS-01637
ASHandle:       AS1637
RegDate:        2004-05-12
Updated:        2011-08-24    
Ref:            https://rdap.arin.net/registry/autnum/1637


OrgName:        Headquarters, USAISC
OrgId:          HEADQU-3
Address:        NETC-ANC CONUS TNOSC
City:           Fort Huachuca
StateProv:      AZ
PostalCode:     85613
Country:        US
RegDate:        1990-03-26
Updated:        2025-03-13
Ref:            https://rdap.arin.net/registry/entity/HEADQU-3


OrgAbuseHandle: REGIS10-ARIN
OrgAbuseName:   Registration
OrgAbusePhone:  +1-844-347-2457 
OrgAbuseEmail:  disa.columbus.ns.mbx.arin-registrations@mail.mil
OrgAbuseRef:    https://rdap.arin.net/registry/entity/REGIS10-ARIN

OrgTechHandle: REGIS10-ARIN
OrgTechName:   Registration
OrgTechPhone:  +1-844-347-2457 
OrgTechEmail:  disa.columbus.ns.mbx.arin-registrations@mail.mil
OrgTechRef:    https://rdap.arin.net/registry/entity/REGIS10-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS27066 United States Department of Defense (DoD) US
AS27066 United States Department of Defense DoD US

Upstreams

AS Number Description Country
AS27066 United States Department of Defense DoD US

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Frequently Asked Questions

ASN AS1637 is an Autonomous System Number used to identify a network for BGP internet routing.
AS1637 is listed under Headquarters, USAISC.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.