ASN AS1540 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS1540?

AS1540 is listed under Headquarters, USAISC.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS1540 Headquarters, USAISC | IPGeolocation.io

ASN Lookup Tool

Headquarters, USAISC mail.mil

US 838 Routes

AS Data

AS1540

AS1540 – Headquarters, USAISC

AS Number	1540
AS Name	DNIC-ASBLK-01534-01546
Organization	Headquarters, USAISC (headqu-3)
Country	US
Website	mail.mil
Number of IPv4 Routes	812
Number of IPv6 Routes	26
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2004-05-12

ASN Intelligence API for production workflows

Use ASN data for AS1540 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
144.104.76.0/24	AS1540	Headquarters, USAISC	Headquarters, USAISC	256
6.65.180.0/23	AS367	United States Department of Defense DoD	Headquarters, USAISC	512
143.74.8.0/23	AS721	United States Department of Defense DoD	Headquarters, USAISC	512
144.245.58.0/24	AS1540	Headquarters, USAISC	Headquarters, USAISC	256
6.76.70.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
155.151.6.0/24	AS1540	Headquarters, USAISC	Headquarters, USAISC	256
6.65.174.0/23	AS367	United States Department of Defense DoD	Headquarters, USAISC	512
144.245.8.0/24	AS1540	Headquarters, USAISC	Headquarters, USAISC	256
158.11.50.0/24	AS1540	Headquarters, USAISC	Headquarters, USAISC	256
6.77.46.0/23	AS367	United States Department of Defense DoD	Headquarters, USAISC	512

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:       1534 - 1546
ASName:         DNIC-ASBLK-01534-01546
ASHandle:       AS1534
RegDate:        2004-05-12
Updated:        2011-08-24
Ref:            https://rdap.arin.net/registry/autnum/1534


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


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

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


#
# 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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "1534 - 1546",
    "as_handle" : "AS1534",
    "as_name" : "DNIC-ASBLK-01534-01546",
    "tech_contacts" : [ "REGIS10-ARIN" ],
    "abuse_contacts" : [ "REGIS10-ARIN" ],
    "date_created" : "2004-05-12",
    "date_updated" : "2011-08-24",
    "source" : "https://rdap.arin.net/registry/autnum/1534"
  } ],
  "organization" : {
    "handle" : "HEADQU-3",
    "name" : "Headquarters, USAISC",
    "address" : [ "NETC-ANC CONUS TNOSC", "Fort Huachuca", "AZ", "85613", "US" ],
    "city" : "Fort Huachuca",
    "state" : "AZ",
    "zip_code" : "85613",
    "country" : [ "US" ],
    "date_created" : "1990-03-26",
    "date_updated" : "2025-03-13",
    "source" : "https://rdap.arin.net/registry/entity/HEADQU-3",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "REGIS10-ARIN",
    "name" : "Registration",
    "email" : [ "disa.columbus.ns.mbx.arin-registrations@mail.mil" ],
    "phone" : [ "+1-844-347-2457" ],
    "source" : "https://rdap.arin.net/registry/entity/REGIS10-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "REGIS10-ARIN",
    "name" : "Registration",
    "email" : [ "disa.columbus.ns.mbx.arin-registrations@mail.mil" ],
    "phone" : [ "+1-844-347-2457" ],
    "source" : "https://rdap.arin.net/registry/entity/REGIS10-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS27064	DoD Network Information Center	US
AS367	United States Department of Defense (DoD)	US
AS370	United States Department of Defense DoD	US
AS337	United States Department of Defense DoD	US
AS27064	United States Department of Defense DoD	US
AS306	United States Department of Defense (DoD)	US
AS13979	AT&T Enterprises, LLC	US
AS306	United States Department of Defense DoD	US
AS421005094
AS331	United States Department of Defense DoD	US

Upstreams

AS Number	Description	Country
AS27064	United States Department of Defense DoD	US
AS367	United States Department of Defense DoD	US

Downstreams

AS Number	Description	Country
AS370	United States Department of Defense DoD	US
AS337	United States Department of Defense DoD	US
AS13979	AT&T Enterprises, LLC	US
AS306	United States Department of Defense DoD	US
AS421005094
AS331	United States Department of Defense DoD	US

Legacy Routes

2608:12a:7464::/48