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AS501
AS501 Air Force Systems Networking
AFCONC-BLOCK1-AS - Air Force Systems Networking · registered in the United States
IPv4 addresses 1,024 3 prefixes · <0.001% of announced IPv4
Rank in United States #8,003 largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide #36,158 of 79,396 networks with IPv4
IPv6 none no IPv6 routes announced
IPv4 prefixes
All 3 prefixes, in address order.
205.173.217.0/24 205.173.218.0/23 205.173.221.0/24
Other ASNs named Air Force Systems Networking
17 other networks use the same organisation name; together with AS501 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 AS427 AFCONC-BLOCK1-AS - Air Force Systems Networking US 133,120 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 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
AS402146 #8000 EXE-DEV - Bold Software Inc1,024 AS402940 #8001 INTERFERE - Interfere1,024 AS202 #8002 CENTURYLINK-LEGACY-LVLT-202 - Level 3 Parent, LLC1,024 AS572 #8004 GBMC-TOW - Greater Baltimore Medical Center Inc1,024 AS606 #8005 SCHAT-AS - schat.net1,024 AS896 #8006 FORTLAB - Fortlab1,024
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