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

Who manages ASN AS1540?

AS1540 is listed under U.S. Army Information Systems Command.

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?

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AS1540 U.S. Army Information Systems Command

U.S. Army Information Systems Command army.mil

US 1291 Routes

AS Data

AS1540

AS1540 – U.S. Army Information Systems Command

AS Number	1540
AS Name	DNIC-ASBLK-01534-01546
Organization	U.S. Army Information Systems Command (headqu-3)
Country	US
Website	army.mil
Number of IPv4 Routes	1245
Number of IPv6 Routes	46
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.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
6.129.95.0/24	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	256
55.209.100.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.70.180.0/23	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	512
2608:161:20::/48	AS1540	Headquarters, USAISC	United States Department of Defense	~1×10²⁴
6.77.24.0/23	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	512
199.122.53.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
143.84.8.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
143.78.0.0/16	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	65536
164.169.144.0/20	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	4096
144.245.36.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.65.59.0/24	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	256
144.109.27.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
160.136.60.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
2608:146:3f10::/48	AS1540	Headquarters, USAISC	United States Department of Defense	~1×10²⁴
132.140.4.0/24	AS1540	Headquarters, USAISC	United States Department of Defense	256
198.51.42.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
147.198.0.0/16	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	65536
6.70.120.0/23	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	512
143.84.68.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.71.196.0/23	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	512
155.29.143.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.131.192.0/22	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	1024
144.245.201.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.131.138.0/24	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	256
164.169.32.0/20	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	4096
6.70.174.0/23	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	512
143.68.192.0/21	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	2048
214.37.205.0/24	AS1540	Headquarters, USAISC	United States Department of Defense	256
155.218.187.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
143.68.194.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.42.200.0/22	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	1024
144.245.41.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
144.245.42.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.72.0.0/20	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	4096
155.29.69.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.16.52.0/24	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	256
155.21.186.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
2608:166:1bd0::/48	AS1540	Headquarters, USAISC	United States Department of Defense	~1×10²⁴
6.65.152.0/23	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	512
155.21.187.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
207.133.16.0/21	AS1540	Headquarters, USAISC	DoD Network Information Center	2048
158.9.139.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
2608:181:ea0::/48	AS1540	Headquarters, USAISC	United States Department of Defense	~1×10²⁴
144.109.16.0/22	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	1024
155.218.186.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
132.140.3.0/24	AS1540	Headquarters, USAISC	United States Department of Defense	256
155.214.128.0/17	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	32768
158.1.135.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
192.132.86.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
147.104.90.0/23	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	512
6.70.168.0/23	AS367	United States Department of Defense DoD	U.S. Army Information Systems Command	512
6.77.2.0/23	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	512
6.69.26.0/23	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	512
6.129.94.0/24	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	256
144.101.99.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
6.69.30.0/23	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	512
6.75.91.0/24	AS749	United States Department of Defense DoD	U.S. Army Information Systems Command	256
155.217.249.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
143.84.74.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	256
143.84.229.0/24	AS1540	Headquarters, USAISC	U.S. Army Information Systems Command	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:       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:        2026-08-12
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" : "2026-08-12",
    "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
AS367	United States Department of Defense	US
AS27064	United States Department of Defense	US
AS306	United States Department of Defense	US
AS588	Headquarters, USAISC	US
AS1493	U.S. Army Information Systems Command	US

Upstreams

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

Downstreams

AS Number	Description	Country
AS306	United States Department of Defense	US
AS588	Headquarters, USAISC	US
AS1493	U.S. Army Information Systems Command	US

Legacy Routes

2608:12a:7464::/48

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