AS391 is an AS number assigned to Air Force Systems Networking. Country or region: United States.

OrganizationAir Force Systems Networking
Registered nameAFCONC-BLOCK1-AS
CountryUnited States (US)
IPv4 addresses283,648
IPv4 ranges40
IPv6 ranges0

AS numbers: United States

IPv4 address ranges (largest 20)

Range (CIDR)AddressesCheck
128.202.0.0/16 65,536 Check if your IP is in this range
128.236.0.0/16 65,536 Check if your IP is in this range
137.0.0.0/16 65,536 Check if your IP is in this range
137.11.0.0/16 65,536 Check if your IP is in this range
131.15.48.0/21 2,048 Check if your IP is in this range
131.15.144.0/21 2,048 Check if your IP is in this range
131.15.160.0/21 2,048 Check if your IP is in this range
131.15.40.0/22 1,024 Check if your IP is in this range
131.15.56.0/22 1,024 Check if your IP is in this range
131.15.68.0/22 1,024 Check if your IP is in this range
131.15.76.0/22 1,024 Check if your IP is in this range
131.15.236.0/22 1,024 Check if your IP is in this range
143.141.96.0/22 1,024 Check if your IP is in this range
131.15.38.0/23 512 Check if your IP is in this range
131.15.44.0/23 512 Check if your IP is in this range
131.15.60.0/23 512 Check if your IP is in this range
131.15.74.0/23 512 Check if your IP is in this range
131.15.90.0/23 512 Check if your IP is in this range
131.15.98.0/23 512 Check if your IP is in this range
131.15.234.0/23 512 Check if your IP is in this range

AS numbers of a similar size

About the data

Compiled by this site from publicly available internet registry assignment information and IP address range data. The data date is the build date of the data when the content of this page last changed. Adjacent ranges are merged and expressed as CIDR blocks, so they may differ from the routes actually announced.

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