ASN Lookup Tool
AS721 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.

ASN Lookup for:

ASN Details

ASN
AS721
Organisation
DoD Network Information Center
AS Name
DNIC-ASBLK-00721-00726
IPv4 Addresses Announced
48,704,132
IPv4 Prefixes Announced
5,491
IPv6 Prefixes Announced
18
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#6 out of 75,511
Registry
Arin
Registered Country
US
Registration Date
1970-01-01
Registration Change
2009-05-15

Receiving From

ASN
Organisation
CenturyLink Communications, LLC
DoD Network Information Center
CenturyLink Communications, LLC
CenturyLink Communications, LLC

Transit To

ASN
Organisation
Private Use AS
DoD Network Information Center
Private Use AS
Private Use AS
Private Use AS
Private Use AS
Private Use AS
RR-RC-L3 Test-Herndon
Private Use AS
DoD Network Information Center

Active Prefixes IPv4

Prefix
Range From
Range To
Showing 10 of 5,496 Results View More >