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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:

AS721

Powered By:
ASN Extended Info API
BGP Active Prefixes API
ASN Details JSON View

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
AS209
CenturyLink Communications, LLC
AS27064
DoD Network Information Center
AS3908
CenturyLink Communications, LLC
AS3910
CenturyLink Communications, LLC

Transit To

ASN
Organisation
AS65000
Private Use AS
AS27064
DoD Network Information Center
AS64515
Private Use AS
AS65001
Private Use AS
AS65009
Private Use AS
AS64595
Private Use AS
AS64905
Private Use AS
AS65005
RR-RC-L3 Test-Herndon
AS65101
Private Use AS
AS27066
DoD Network Information Center

Active Prefixes IPv4

Prefix
Range From
Range To
Prefix 128.26.0.0/21
Range From 128.26.0.0
Range To 128.26.7.255
Prefix 128.26.113.0/24
Range From 128.26.113.0
Range To 128.26.113.255
Prefix 128.26.114.0/23
Range From 128.26.114.0
Range To 128.26.115.255
Prefix 128.26.117.0/24
Range From 128.26.117.0
Range To 128.26.117.255
Prefix 128.26.122.0/24
Range From 128.26.122.0
Range To 128.26.122.255
Prefix 128.26.127.0/24
Range From 128.26.127.0
Range To 128.26.127.255
Prefix 128.26.13.0/24
Range From 128.26.13.0
Range To 128.26.13.255
Prefix 128.26.139.0/24
Range From 128.26.139.0
Range To 128.26.139.255
Prefix 128.26.247.0/24
Range From 128.26.247.0
Range To 128.26.247.255
Prefix 128.26.40.0/23
Range From 128.26.40.0
Range To 128.26.41.255
Showing 10 of 5,496 Results View More >

Active Prefixes IPv6

Prefix
Range From
Range To
Prefix 2608:121:1::/48
Range From 2608:121:1::
Range To 2608:121:1:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:10::/44
Range From 2608:121:10::
Range To 2608:121:1f:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:100::/40
Range From 2608:121:100::
Range To 2608:121:1ff:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:1000::/36
Range From 2608:121:1000::
Range To 2608:121:1fff:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:2::/47
Range From 2608:121:2::
Range To 2608:121:3:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:20::/43
Range From 2608:121:20::
Range To 2608:121:3f:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:200::/39
Range From 2608:121:200::
Range To 2608:121:3ff:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:2000::/35
Range From 2608:121:2000::
Range To 2608:121:3fff:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:4::/46
Range From 2608:121:4::
Range To 2608:121:7:ffff:ffff:ffff:ffff:ffff
Prefix 2608:121:40::/42
Range From 2608:121:40::
Range To 2608:121:7f:ffff:ffff:ffff:ffff:ffff
Showing 10 of 18 Results View More >