ASN Lookup Tool

United States Department of Defense defense.gov US US 332 Routes

AS Data

AS306

AS306 – United States Department of Defense

AS Number 306
AS Name DNIC-ASBLK-00306-00371
Organization United States Department of Defense (usddd)
Country US
Website defense.gov
Number of IPv4 Routes 276
Number of IPv6 Routes 56
ASN type GOVERNMENT
Registry ARIN
Date Allocated 1989-06-30

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Use ASN data for AS306 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
132.131.253.0/24 256
132.127.40.0/21 2048
132.125.48.0/21 2048
132.105.40.0/21 2048
132.111.0.0/16 65536
55.85.100.0/23 512
2608:12a:7464::/48 ~1×10²⁴
2608:14a:7551::/48 ~1×10²⁴
132.103.48.0/21 2048
132.106.12.0/24 256
2608:10a:7347::/48 ~1×10²⁴
132.110.253.0/24 256
132.132.0.0/16 65536
2608:16a:7100::/40 ~309×10²⁴
2608:18b:7719::/48 ~1×10²⁴
132.111.40.0/21 2048
132.128.12.0/24 256
132.98.242.0/24 256
55.85.0.0/16 65536
2608:12a:7446::/48 ~1×10²⁴
132.116.0.0/16 65536
132.96.241.0/24 256
132.84.12.0/24 256
55.85.64.0/23 512
132.106.253.0/24 256
132.118.48.0/21 2048
132.131.48.0/21 2048
132.106.0.0/16 65536
132.100.0.0/16 65536
132.112.242.0/24 256
132.96.253.0/24 256
132.112.40.0/21 2048
132.94.0.0/16 65536
132.89.0.0/16 65536
132.126.249.0/24 256
55.38.0.0/16 65536
132.90.40.0/21 2048
132.85.198.0/24 256
132.102.198.0/24 256
132.89.253.0/24 256
132.124.48.0/21 2048
132.127.0.0/16 65536
132.121.0.0/16 65536
132.117.242.0/24 256
132.99.12.0/24 256
55.85.29.0/24 256
55.17.0.0/16 65536
132.99.198.0/24 256
132.132.40.0/21 2048
2608:10a:7336::/48 ~1×10²⁴
55.85.106.0/23 512
2608:12a:7453::/48 ~1×10²⁴
132.98.40.0/21 2048
132.93.253.0/24 256
132.90.0.0/16 65536
132.104.48.0/21 2048
2608:18b:7718::/48 ~1×10²⁴
132.130.48.0/21 2048
132.107.198.0/24 256
132.106.40.0/21 2048

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:       306 - 371
ASName:         DNIC-ASBLK-00306-00371
ASHandle:       AS306
RegDate:        1989-06-30
Updated:        2025-09-12
Ref:            https://rdap.arin.net/registry/autnum/306



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
AS320 United States Department of Defense DoD US
AS325 United States Department of Defense DoD US
AS335 United States Department of Defense DoD US
AS369 United States Department of Defense DoD US
AS364 United States Department of Defense DoD US
AS354 United States Department of Defense DoD US
AS344 United States Department of Defense DoD US
AS359 United States Department of Defense DoD US
AS334 United States Department of Defense DoD US
AS1542 Headquarters, USAISC US
AS349 United States Department of Defense DoD US
AS319 United States Department of Defense DoD US
AS368 United States Department of Defense DoD US
AS339 United States Department of Defense DoD US
AS21326 AT&T Global Network Services Nederland B.V. NL
AS343 United States Department of Defense DoD US
AS353 United States Department of Defense DoD US
AS324 United States Department of Defense DoD US
AS329 United States Department of Defense DoD US
AS358 United States Department of Defense DoD US
AS323 United States Department of Defense DoD US
AS500 Air Force Systems Networking US
AS348 United States Department of Defense DoD US
AS362 United States Department of Defense DoD US
AS338 United States Department of Defense DoD US
AS367 United States Department of Defense DoD US
AS357 United States Department of Defense DoD US
AS352 United States Department of Defense DoD US
AS328 United States Department of Defense DoD US
AS371 United States Department of Defense DoD US
AS347 United States Department of Defense DoD US
AS342 United States Department of Defense DoD US
AS327 United States Department of Defense DoD US
AS361 United States Department of Defense DoD US
AS366 United States Department of Defense DoD US
AS337 United States Department of Defense DoD US
AS1540 Headquarters, USAISC US
AS356 United States Department of Defense DoD US
AS27066 United States Department of Defense DoD US
AS351 United States Department of Defense DoD US
AS1530 Headquarters, USAISC US
AS322 United States Department of Defense DoD US
AS346 United States Department of Defense DoD US
AS370 United States Department of Defense DoD US
AS321 United States Department of Defense DoD US
AS341 United States Department of Defense DoD US
AS317 United States Department of Defense DoD US
AS336 United States Department of Defense DoD US
AS365 United States Department of Defense DoD US
AS331 United States Department of Defense DoD US
AS360 United States Department of Defense DoD US
AS355 United States Department of Defense DoD US
AS316 United States Department of Defense DoD US
AS350 United States Department of Defense DoD US
AS575 Headquarters, USAISC US
AS345 United States Department of Defense DoD US
AS326 United States Department of Defense DoD US
AS340 United States Department of Defense DoD US

Upstreams

AS Number Description Country
AS1540 Headquarters, USAISC US
AS27066 United States Department of Defense DoD US
AS367 United States Department of Defense DoD US

Downstreams

AS Number Description Country
AS320 United States Department of Defense DoD US
AS325 United States Department of Defense DoD US
AS335 United States Department of Defense DoD US
AS369 United States Department of Defense DoD US
AS364 United States Department of Defense DoD US
AS354 United States Department of Defense DoD US
AS344 United States Department of Defense DoD US
AS359 United States Department of Defense DoD US
AS334 United States Department of Defense DoD US
AS1542 Headquarters, USAISC US

Legacy Routes

55.78.0.0/16

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Frequently Asked Questions

ASN AS306 is an Autonomous System Number used to identify a network for BGP internet routing.
AS306 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.