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ASN Lookup Tool
AS5231 DoD Network Information Center

An Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.

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ASN Lookup for:

AS5231

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ASN Extended Info API
BGP Active Prefixes API
ASN Details JSON View

ASN Details

ASN
AS5231
Organisation
DoD Network Information Center
AS Name
DNIC-ASBLK-05120-05376
IPv4 Addresses Announced
5,888
IPv4 Prefixes Announced
23
IPv6 Prefixes Announced
0
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#13,103 out of 75,696
Registry
Arin
Registered Country
US
Registration Date
1995-05-09
Registration Change
2009-05-14

Receiving From

ASN
Organisation
AS27065
DoD Network Information Center

Transit To

ASN
Organisation
AS4021
Air Force Systems Networking

Active Prefixes IPv4

Prefix
Range From
Range To
Prefix 128.26.47.0/24
Range From 128.26.47.0
Range To 128.26.47.255
Prefix 128.26.61.0/24
Range From 128.26.61.0
Range To 128.26.61.255
Prefix 128.26.63.0/24
Range From 128.26.63.0
Range To 128.26.63.255
Prefix 128.26.64.0/24
Range From 128.26.64.0
Range To 128.26.64.255
Prefix 128.26.66.0/24
Range From 128.26.66.0
Range To 128.26.66.255
Prefix 128.26.67.0/24
Range From 128.26.67.0
Range To 128.26.67.255
Prefix 128.26.70.0/24
Range From 128.26.70.0
Range To 128.26.70.255
Prefix 198.218.118.0/24
Range From 198.218.118.0
Range To 198.218.118.255
Prefix 198.218.119.0/24
Range From 198.218.119.0
Range To 198.218.119.255
Prefix 198.218.170.0/24
Range From 198.218.170.0
Range To 198.218.170.255
Showing 10 of 23 Results View More >