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AS427
AS427 Air Force Systems Networking
AFCONC-BLOCK1-AS - Air Force Systems Networking · registered in the United States
IPv4 addresses 133,120 14 prefixes · 0.004% of announced IPv4
Rank in United States #463 largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide #1,476 of 79,396 networks with IPv4
IPv6 none no IPv6 routes announced
IPv4 prefixes
All 14 prefixes, in address order.
132.3.12.0/22 132.16.0.0/16 132.61.0.0/17 132.61.128.0/19 132.61.160.0/20 132.61.176.0/24 132.61.177.0/24 132.61.178.0/23 132.61.180.0/22 132.61.184.0/21 132.61.192.0/18 192.77.104.0/24 198.218.204.0/24 199.251.88.0/23
Other ASNs named Air Force Systems Networking
17 other networks use the same organisation name; together with AS427 they announce 883,200 IPv4 addresses.
ASN Name IPv4 addresses
AS391 AFCONC-BLOCK1-AS - Air Force Systems Networking US 283,648 AS409 AFCONC-BLOCK1-AS - Air Force Systems Networking US 269,312 AS399 AFCONC-BLOCK1-AS - Air Force Systems Networking US 153,600 AS745 AFCONC-BLOCK2-AS - Air Force Systems Networking US 33,280 AS485 AFCONC-BLOCK1-AS - Air Force Systems Networking US 2,304 AS400 AFCONC-BLOCK1-AS - Air Force Systems Networking US 2,048 AS500 AFCONC-BLOCK1-AS - Air Force Systems Networking US 1,536 AS501 AFCONC-BLOCK1-AS - Air Force Systems Networking US 1,024 AS65 AF-RASN-65 - Air Force Systems Networking US 512 AS406 AFCONC-BLOCK1-AS - Air Force Systems Networking US 512 AS467 AFCONC-BLOCK1-AS - Air Force Systems Networking US 512 AS468 AFCONC-BLOCK1-AS - Air Force Systems Networking US 512 AS384 AFCONC-BLOCK1-AS - Air Force Systems Networking US 256 AS405 AFCONC-BLOCK1-AS - Air Force Systems Networking US 256 AS408 AFCONC-BLOCK1-AS - Air Force Systems Networking US 256 AS461 AFCONC-BLOCK1-AS - Air Force Systems Networking US 256 AS463 AFCONC-BLOCK1-AS - Air Force Systems Networking US 256
Similar-sized networks in United States
ASN Name IPv4 addresses
AS111 #460 BOSTONU-AS - Boston University133,376 AS3512 #461 EUSHC - Emory University133,376 AS89 #462 DNIC-AS-00089 - Navy Network Information Center (NNIC)133,120 AS11995 #464 OHSU - Oregon Health & Science University133,120 AS14499 #465 ALORICA - ALORICA INC132,864 AS23352 #466 SERVERCENTRAL - DEFT.COM132,608
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