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ASN Lookup Tool
AS7991 CenturyLink Communications, LLC

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:

AS7991

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

ASN Details

ASN
AS7991
Organisation
CenturyLink Communications, LLC
AS Name
CENTURYLINK-LEGACY-SAVVIS-ASIA-TRANSIT
IPv4 Addresses Announced
28,672
IPv4 Prefixes Announced
33
IPv6 Prefixes Announced
3
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#5,431 out of 75,619
Registry
Arin
Registered Country
US
Registration Date
1997-03-14
Registration Change
2018-11-15

Receiving From

ASN
Organisation
AS3356
Level 3 Parent, LLC
AS3908
CenturyLink Communications, LLC

Transit To

ASN
Organisation
AS3561
CenturyLink Communications, LLC

Active Prefixes IPv4

Prefix
Range From
Range To
Prefix 162.107.176.0/21
Range From 162.107.176.0
Range To 162.107.183.255
Prefix 202.126.0.0/20
Range From 202.126.0.0
Range To 202.126.15.255
Prefix 203.82.128.0/23
Range From 203.82.128.0
Range To 203.82.129.255
Prefix 203.82.130.0/24
Range From 203.82.130.0
Range To 203.82.130.255
Prefix 203.82.131.0/24
Range From 203.82.131.0
Range To 203.82.131.255
Prefix 203.82.132.0/22
Range From 203.82.132.0
Range To 203.82.135.255
Prefix 203.82.136.0/21
Range From 203.82.136.0
Range To 203.82.143.255
Prefix 203.82.144.0/21
Range From 203.82.144.0
Range To 203.82.151.255
Prefix 203.82.152.0/22
Range From 203.82.152.0
Range To 203.82.155.255
Prefix 203.82.156.0/24
Range From 203.82.156.0
Range To 203.82.156.255
Showing 10 of 33 Results View More >

Active Prefixes IPv6

Prefix
Range From
Range To
Prefix 2001:460:78:1000::/52
Range From 2001:460:78:1000::
Range To 2001:460:78:1fff:ffff:ffff:ffff:ffff
Prefix 2001:460:78:2000::/52
Range From 2001:460:78:2000::
Range To 2001:460:78:2fff:ffff:ffff:ffff:ffff
Prefix 2001:460:80:2000::/52
Range From 2001:460:80:2000::
Range To 2001:460:80:2fff:ffff:ffff:ffff:ffff