ASN Lookup Tool

United States Department of Defense defense.gov US US 166 Routes

AS Data

AS27138

AS27138 – United States Department of Defense

AS Number 27138
AS Name DNIC-ASBLK-27032-27159
Organization United States Department of Defense (usddd)
Country US
Website defense.gov
Number of IPv4 Routes 166
Number of IPv6 Routes 0
ASN type GOVERNMENT
Registry ARIN
Date Allocated 2003-01-16

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IP Ranges

Route # IPs
198.218.91.0/24 256
198.218.5.0/24 256
198.220.186.0/24 256
128.26.83.0/24 256
128.26.241.0/24 256
198.218.70.0/24 256
128.26.101.0/24 256
214.25.192.0/24 256
128.26.96.0/24 256
198.218.157.0/24 256
198.218.52.0/24 256
128.26.23.0/24 256
128.26.250.0/24 256
198.220.153.0/24 256
198.218.20.0/24 256
139.241.243.0/24 256
128.26.244.0/24 256
205.58.105.0/24 256
205.60.239.0/24 256
198.218.8.0/24 256
198.218.118.0/24 256
198.218.1.0/24 256
128.26.20.0/24 256
198.220.189.0/24 256
198.218.61.0/24 256
128.26.18.0/24 256
205.73.190.0/23 512
198.220.71.0/24 256
128.26.253.0/24 256
198.218.112.0/24 256
128.26.248.0/24 256
198.219.175.0/24 256
128.26.116.0/24 256
198.220.76.0/24 256
214.29.117.0/24 256
198.220.85.0/24 256
198.220.77.0/24 256
128.26.239.0/24 256
128.26.137.0/24 256
128.26.110.0/24 256
128.26.89.0/24 256
198.220.187.0/24 256
198.218.103.0/24 256
198.218.200.0/24 256
198.220.86.0/24 256
128.26.232.0/24 256
128.26.44.0/24 256
128.26.108.0/24 256
214.29.108.0/24 256
205.58.106.0/24 256
214.4.197.0/24 256
128.26.24.0/24 256
198.219.147.0/24 256
128.26.15.0/24 256
198.218.71.0/24 256
128.26.231.0/24 256
128.26.52.0/24 256
128.26.144.0/24 256
128.26.240.0/24 256
128.26.102.0/24 256

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:       27032 - 27159
ASName:         DNIC-ASBLK-27032-27159
ASHandle:       AS27032
RegDate:        2003-01-16
Updated:        2025-09-12
Ref:            https://rdap.arin.net/registry/autnum/27032



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:        2026-08-12
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

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: 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


#
# 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
AS3474 United States Department of Defense DoD US
AS27064 United States Department of Defense US
AS27137 United States Department of Defense DoD US
AS3472 United States Department of Defense DoD US

Upstreams

AS Number Description Country
AS27064 United States Department of Defense US
AS27137 United States Department of Defense DoD US

Downstreams

AS Number Description Country
AS3474 United States Department of Defense DoD US
AS3472 United States Department of Defense DoD US

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Frequently Asked Questions

ASN AS27138 is an Autonomous System Number used to identify a network for BGP internet routing.
AS27138 is listed under United States Department of Defense.
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.