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ASN Lookup Tool
AS4021 ASN-4020-1

Powered By:
ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS4021
Organisation
Air Force Systems Networking
Name
ASN-4020-1
Total IPv4 Addresses
1520
Total IPv4 Prefixes
6
Total IPv6 Prefixes
0
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#27,446 out of 76,212
Registry
Arin
Registered Country
US flag US
Registered Country Name
United States of America (the)
Registered Date
1994-11-17
Registration Last Change
2012-12-14
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS367
US flagDoD Network Information Center
AS5231
US flagDoD Network Information Center
AS27139
US flagDoD Network Information Center
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix128.26.29.0/24
Range From128.26.29.0
Range To128.26.29.255
Prefix128.26.53.0/24
Range From128.26.53.0
Range To128.26.53.255
Prefix128.26.73.0/24
Range From128.26.73.0
Range To128.26.73.255
Prefix128.26.76.0/24
Range From128.26.76.0
Range To128.26.76.255
Prefix198.218.102.0/24
Range From198.218.102.0
Range To198.218.102.255
Showing 5 of 6
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.