ASN AS399 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS399?

AS399 is listed under United States Air Force.

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.

AS399 United States Air Force

ASN Lookup Tool

United States Air Force af.mil

US 15 Routes

AS Data

AS399

AS399 – United States Air Force

AS Number	399
AS Name	AFCONC-BLOCK1-AS
Organization	United States Air Force (7esg)
Country	US
Website	af.mil
Number of IPv4 Routes	15
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	1989-08-04

ASN Intelligence API for production workflows

Use ASN data for AS399 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
132.7.69.0/24	AS721	United States Department of Defense	Air Force Systems Networking	256
131.38.0.0/16	AS399	United States Air Force	Air Force Systems Networking	65536
134.165.99.0/24	AS0		Air Force Systems Networking	256
131.49.0.0/16	AS399	United States Air Force	Air Force Systems Networking	65536
131.38.120.0/24	AS399	United States Air Force	Air Force Systems Networking	256
132.7.103.0/24	AS721	United States Department of Defense	Air Force Systems Networking	256
143.147.80.0/21	AS399	United States Air Force	United States Department of Defense DoD	2048
132.7.66.0/24	AS721	United States Department of Defense	Air Force Systems Networking	256
132.3.0.0/22	AS399	United States Air Force	Air Force Systems Networking	1024
143.157.80.0/21	AS399	United States Air Force	United States Department of Defense DoD	2048
132.7.39.0/24	AS721	United States Department of Defense	Air Force Systems Networking	256
143.156.192.0/19	AS399	United States Air Force	United States Department of Defense DoD	8192
143.146.192.0/19	AS399	United States Air Force	United States Department of Defense DoD	8192
132.7.73.0/24	AS721	United States Department of Defense	Air Force Systems Networking	256
132.7.90.0/24	AS721	United States Department of Defense	Air Force Systems Networking	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:       379 - 508
ASName:         AFCONC-BLOCK1-AS
ASHandle:       AS379
RegDate:        1989-08-04
Updated:        2008-06-06
Ref:            https://rdap.arin.net/registry/autnum/379


OrgName:        Air Force Systems Networking
OrgId:          7ESG
Address:        501 EAST MOORE DR. BLDG 884 RM 1100 GUNTHER ANNEX
City:           MAXWELL AFB
StateProv:      AL
PostalCode:     36114
Country:        US
RegDate:        2008-06-05
Updated:        2026-08-12
Ref:            https://rdap.arin.net/registry/entity/7ESG


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" : "379 - 508",
    "as_handle" : "AS379",
    "as_name" : "AFCONC-BLOCK1-AS",
    "tech_contacts" : [ "REGIS10-ARIN" ],
    "abuse_contacts" : [ "REGIS10-ARIN" ],
    "date_created" : "1989-08-04",
    "date_updated" : "2008-06-06",
    "source" : "https://rdap.arin.net/registry/autnum/379"
  } ],
  "organization" : {
    "handle" : "7ESG",
    "name" : "Air Force Systems Networking",
    "address" : [ "501 EAST MOORE DR. BLDG 884 RM 1100 GUNTHER ANNEX", "MAXWELL AFB", "AL", "36114", "US" ],
    "street" : "East Moore Dr.",
    "city" : "Afb",
    "state" : "AL",
    "zip_code" : "36114",
    "country" : [ "US" ],
    "date_created" : "2008-06-05",
    "date_updated" : "2026-08-12",
    "source" : "https://rdap.arin.net/registry/entity/7ESG",
    "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
AS27066	United States Department of Defense DoD	US

Upstreams

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