AS400 Air Force Systems Networking

AFCONC-BLOCK1-AS - Air Force Systems Networking · registered in the United States

IPv4 addresses2,0481 prefixes · <0.001% of announced IPv4

Rank in United States#6,105largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#22,746of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS400 in ASN lookup Look up an IP in this network (132.3.104.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

132.3.104.0/21

Other ASNs named Air Force Systems Networking

17 other networks use the same organisation name; together with AS400 they announce 883,200 IPv4 addresses.

ASNNameIPv4 addresses

AS391AFCONC-BLOCK1-AS - Air Force Systems Networking US283,648

AS409AFCONC-BLOCK1-AS - Air Force Systems Networking US269,312

AS399AFCONC-BLOCK1-AS - Air Force Systems Networking US153,600

AS427AFCONC-BLOCK1-AS - Air Force Systems Networking US133,120

AS745AFCONC-BLOCK2-AS - Air Force Systems Networking US33,280

AS485AFCONC-BLOCK1-AS - Air Force Systems Networking US2,304

AS500AFCONC-BLOCK1-AS - Air Force Systems Networking US1,536

AS501AFCONC-BLOCK1-AS - Air Force Systems Networking US1,024

AS65AF-RASN-65 - Air Force Systems Networking US512

AS406AFCONC-BLOCK1-AS - Air Force Systems Networking US512

AS467AFCONC-BLOCK1-AS - Air Force Systems Networking US512

AS468AFCONC-BLOCK1-AS - Air Force Systems Networking US512

AS384AFCONC-BLOCK1-AS - Air Force Systems Networking US256

AS405AFCONC-BLOCK1-AS - Air Force Systems Networking US256

AS408AFCONC-BLOCK1-AS - Air Force Systems Networking US256

AS461AFCONC-BLOCK1-AS - Air Force Systems Networking US256

AS463AFCONC-BLOCK1-AS - Air Force Systems Networking US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS397550#6102 GST-SERVICES - GST Services LLC2,048

AS399589#6103 1111-SYSTEMS - 11 11 Systems, Inc2,048

AS223#6104 AS223 - Parsons Corporation2,048

AS1078#6106 LIGHTWAVE-COMMUNICATIONS - Lightwave2,048

AS1347#6107 VOYANT-LAB - Inteliquent, inc.2,048

AS1643#6108 BROC-11-ASN - Brockway Television Inc.2,048

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