ASN AS749 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS749?

AS749 is listed under United States Department of Defense DoD.

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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AS749 United States Department of Defense DoD

United States Department of Defense DoD mail.mil

US 3138 Routes

AS Data

AS749

AS749 – United States Department of Defense DoD

AS Number	749
AS Name	DNIC-AS-00749
Organization	United States Department of Defense DoD (usddd)
Country	US
Website	mail.mil
Number of IPv4 Routes	3138
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS749 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
205.52.0.0/24	AS749	United States Department of Defense DoD	United States Department of Defense DoD	256
192.86.108.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
147.242.28.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
22.5.160.0/19	AS749	United States Department of Defense DoD	DoD Network Information Center	8192
205.10.146.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
6.129.128.0/17	AS749	United States Department of Defense DoD	Headquarters, USAISC	32768
128.26.30.0/23	AS749	United States Department of Defense DoD	Air Force Systems Networking	512
150.196.16.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
128.26.192.0/20	AS749	United States Department of Defense DoD	Air Force Systems Networking	4096
164.235.0.0/23	AS749	United States Department of Defense DoD	DoD Network Information Center	512
131.2.0.0/16	AS749	United States Department of Defense DoD	Air Force Systems Networking	65536
134.229.192.0/20	AS749	United States Department of Defense DoD	Navy Network Information Center NNIC	4096
215.4.0.0/14	AS749	United States Department of Defense DoD	DoD Network Information Center	262144
155.26.110.0/24	AS749	United States Department of Defense DoD	Headquarters, USAISC	256
205.4.166.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
192.40.22.0/24	AS749	United States Department of Defense DoD	United States Department of Defense DoD	256
199.10.48.0/21	AS749	United States Department of Defense DoD	Headquarters, USAISC	2048
155.27.68.0/22	AS749	United States Department of Defense DoD	Headquarters, USAISC	1024
156.112.69.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
199.9.176.0/23	AS749	United States Department of Defense DoD	United States Department of Defense DoD	512
155.156.0.0/16	AS749	United States Department of Defense DoD	DoD Network Information Center	65536
155.21.128.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
11.43.0.0/17	AS749	DoD Network Information Center	DoD Network Information Center	32768
192.149.213.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
6.64.108.0/22	AS749	United States Department of Defense DoD	Headquarters, USAISC	1024
129.251.20.0/22	AS749	United States Department of Defense DoD	DoD Network Information Center	1024
137.235.6.0/23	AS749	United States Department of Defense DoD	DoD Network Information Center	512
192.25.151.0/24	AS749	United States Department of Defense DoD	Headquarters, USAISC	256
192.136.120.0/21	AS749	United States Department of Defense DoD	Headquarters, USAISC	2048
6.129.64.0/18	AS749	United States Department of Defense DoD	Headquarters, USAISC	16384
192.91.32.0/20	AS749	United States Department of Defense DoD	United States Department of Defense DoD	4096
22.45.236.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
140.18.179.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
22.185.25.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
205.25.232.0/23	AS749	United States Department of Defense DoD	DoD Network Information Center	512
6.51.96.0/19	AS749	United States Department of Defense DoD	Headquarters, USAISC	8192
6.64.96.0/21	AS749	United States Department of Defense DoD	Headquarters, USAISC	2048
164.235.8.0/22	AS749	United States Department of Defense DoD	DoD Network Information Center	1024
143.230.144.0/23	AS749	United States Department of Defense DoD	Air Force Systems Networking	512
6.70.44.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
139.235.16.0/20	AS749	United States Department of Defense DoD	CCSNET DISA PAAS AMAZON	4096
11.5.40.0/21	AS749	DoD Network Information Center	DoD Network Information Center	2048
214.126.0.0/15	AS749	United States Department of Defense DoD	United States Department of Defense DoD	131072
128.26.222.0/23	AS749	United States Department of Defense DoD	Air Force Systems Networking	512
155.21.32.0/19	AS749	United States Department of Defense DoD	Headquarters, USAISC	8192
192.108.185.0/24	AS749	DoD Network Information Center	DoD Network Information Center	256
11.71.124.0/23	AS749	DoD Network Information Center	DoD Network Information Center	512
129.251.116.0/22	AS749	United States Department of Defense DoD	DoD Network Information Center	1024
155.29.252.0/22	AS749	United States Department of Defense DoD	Headquarters, USAISC	1024
205.21.189.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
155.27.60.0/23	AS749	United States Department of Defense DoD	Headquarters, USAISC	512
205.20.173.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
156.112.105.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
22.186.146.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
164.188.0.0/15	AS749	United States Department of Defense DoD	DIA	131072
6.56.0.0/13	AS0			524288
205.12.24.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
192.12.8.0/24	AS749	United States Department of Defense DoD	Headquarters, USAISC	256
199.10.141.0/24	AS749	United States Department of Defense DoD	DoD Network Information Center	256
134.229.59.0/24	AS749	United States Department of Defense DoD	Navy Network Information Center NNIC	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:       749
ASName:         DNIC-AS-00749
ASHandle:       AS749
RegDate:        
Updated:        2025-09-12
Ref:            https://rdap.arin.net/registry/autnum/749


OrgName:        United States Department of Defense (DoD)
OrgId:          USDDD
Address:        3990 E. Broad Street
City:           Columbus
StateProv:      OH
PostalCode:     43218
Country:        US
RegDate:        2007-01-12
Updated:        2025-03-13
Ref:            https://rdap.arin.net/registry/entity/USDDD


OrgNOCHandle: MIL-HSTMST-ARIN
OrgNOCName:   Network DoD
OrgNOCPhone:  +1-844-347-2457 
OrgNOCEmail:  disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
OrgNOCRef:    https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN

OrgTechHandle: MIL-HSTMST-ARIN
OrgTechName:   Network DoD
OrgTechPhone:  +1-844-347-2457 
OrgTechEmail:  disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
OrgTechRef:    https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN

OrgAbuseHandle: MIL-HSTMST-ARIN
OrgAbuseName:   Network DoD
OrgAbusePhone:  +1-844-347-2457 
OrgAbuseEmail:  disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MIL-HSTMST-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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "749",
    "as_handle" : "AS749",
    "as_name" : "DNIC-AS-00749",
    "tech_contacts" : [ "MIL-HSTMST-ARIN", "REGIS10-ARIN" ],
    "abuse_contacts" : [ "MIL-HSTMST-ARIN" ],
    "date_updated" : "2025-09-12",
    "source" : "https://rdap.arin.net/registry/autnum/749"
  } ],
  "organization" : {
    "handle" : "USDDD",
    "name" : "United States Department of Defense (DoD)",
    "address" : [ "3990 E. Broad Street", "Columbus", "OH", "43218", "US" ],
    "street" : "E. Broad Street",
    "city" : "Columbus",
    "state" : "OH",
    "zip_code" : "43218",
    "country" : [ "US" ],
    "date_created" : "2007-01-12",
    "date_updated" : "2025-03-13",
    "source" : "https://rdap.arin.net/registry/entity/USDDD",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "MIL-HSTMST-ARIN",
    "name" : "Network DoD",
    "email" : [ "disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil" ],
    "phone" : [ "+1-844-347-2457" ],
    "source" : "https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN"
  }, {
    "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" : "MIL-HSTMST-ARIN",
    "name" : "Network DoD",
    "email" : [ "disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil" ],
    "phone" : [ "+1-844-347-2457" ],
    "source" : "https://rdap.arin.net/registry/entity/MIL-HSTMST-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS271253	LINK BRASIL TELECOMUNICACOES LTDA	BR
AS1000	LINK AMERICAN	US
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US

Legacy Routes

147.104.105.0/24 6.70.12.0/22 6.72.174.0/23

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