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AS340
AS340 United States Department of Defense (DoD)
DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) · registered in the United States
IPv4 addresses 196,352 23 prefixes · 0.006% of announced IPv4
Rank in United States #340 largest network in US by IPv4 space, of 18,338 · 0.01% of US
Rank worldwide #1,122 of 79,396 networks with IPv4
IPv6 256 x /48 1 prefixes
IPv4 prefixes
All 23 prefixes, in address order.
55.40.0.0/17 55.40.128.0/18 55.40.192.0/19 55.40.224.0/20 55.40.240.0/23 55.40.242.0/24 55.40.243.0/24 55.40.244.0/22 55.40.248.0/21 55.73.0.0/16 55.86.0.0/23 55.86.3.0/24 55.86.4.0/22 55.86.8.0/21 55.86.16.0/20 55.86.32.0/20 55.86.48.0/23 55.86.50.0/24 55.86.51.0/24 55.86.52.0/22 55.86.56.0/21 55.86.64.0/18 55.86.128.0/17
IPv6 prefixes
All 1 prefix.
Other ASNs named United States Department of Defense (DoD)
172 other networks use the same organisation name; together with AS340 they announce 282,590,464 IPv4 addresses. Largest 30 shown.
ASN Name IPv4 addresses
AS749 DNIC-AS-00749 - United States Department of Defense (DoD) US 222,038,272 AS721 DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) US 29,541,376 AS56 DNIC-AS-00056 - United States Department of Defense (DoD) US 7,785,728 AS306 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 4,492,288 AS668 DNIC-AS-00668 - United States Department of Defense (DoD) US 2,549,504 AS5972 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US 1,865,472 AS27064 DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) US 1,594,112 AS637 DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) US 929,280 AS367 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 811,776 AS5852 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US 526,592 AS357 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 393,216 AS361 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 393,216 AS647 DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) US 348,928 AS27046 DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) US 311,552 AS5180 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) US 270,848 AS1554 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) US 266,496 AS5277 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) US 265,472 AS370 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 264,192 AS6039 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US 224,000 AS1600 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) US 197,120 AS331 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 196,608 AS335 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 196,608 AS5371 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) US 196,352 AS6035 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US 167,936 AS27142 DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) US 155,904 AS6041 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) US 147,200 AS665 DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) US 142,848 AS345 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 132,608 AS1556 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) US 132,096 AS329 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) US 131,840
Similar-sized networks in United States
ASN Name IPv4 addresses
AS331 #337 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)196,608 AS335 #338 DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD)196,608 AS22390 #339 XEROX-WB - XEROX CORPORATION196,608 AS5371 #341 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)196,352 AS2553 #342 FSU-AS - Florida State University196,336 AS5653 #343 UCSF - University of California San Francisco196,242
IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources