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ASN Lookup Tool
AS209 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.

ASN Lookup for:

AS209

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

ASN Details

ASN
AS209
Organisation
CenturyLink Communications, LLC
AS Name
CENTURYLINK-US-LEGACY-QWEST
IPv4 Addresses Announced
17,669,184
IPv4 Prefixes Announced
6,706
IPv6 Prefixes Announced
551
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#24 out of 75,458
Registry
Arin
Registered Country
US flag US
Registration Date
1998-11-13
Registration Change
2018-10-04

Receiving From

ASN
Organisation
ASN
AS7018
Organisation
US flag AT&T Services, Inc.
ASN
AS3356
Organisation
US flag Level 3 Parent, LLC
ASN
AS7922
Organisation
US flag Comcast Cable Communications, LLC
ASN
AS174
Organisation
US flag Cogent Communications
ASN
AS2516
Organisation
JP flag KDDI CORPORATION
ASN
AS209
Organisation
US flag CenturyLink Communications, LLC
ASN
AS1239
Organisation
US flag Sprint
ASN
AS1221
Organisation
AU flag Telstra Corporation Limited
ASN
AS3209
Organisation
DE flag Vodafone GmbH
ASN
AS3561
Organisation
US flag CenturyLink Communications, LLC
Showing 10 of 90 Results View More >

Transit To

ASN
Organisation
ASN
AS4297
Organisation
US flag CenturyLink Communications, LLC
ASN
AS53692
Organisation
US flag Interop Show Network
ASN
AS4296
Organisation
US flag CenturyLink Communications, LLC
ASN
AS7018
Organisation
US flag AT&T Services, Inc.
ASN
AS721
Organisation
US flag DoD Network Information Center
ASN
AS701
Organisation
US flag Verizon Business
ASN
AS6167
Organisation
US flag Verizon Business
ASN
AS3356
Organisation
US flag Level 3 Parent, LLC
ASN
AS22394
Organisation
US flag Verizon Business
ASN
AS209
Organisation
US flag CenturyLink Communications, LLC
Showing 10 of 1,167 Results View More >

Active Prefixes IPv4

Prefix
Range From
Range To
Prefix
100.70.104.0/24
Range From
100.70.104.0
Range To
100.70.104.255
Prefix
100.70.106.0/24
Range From
100.70.106.0
Range To
100.70.106.255
Prefix
100.70.108.0/24
Range From
100.70.108.0
Range To
100.70.108.255
Prefix
100.70.140.0/22
Range From
100.70.140.0
Range To
100.70.143.255
Prefix
100.70.144.0/20
Range From
100.70.144.0
Range To
100.70.159.255
Prefix
100.70.16.0/24
Range From
100.70.16.0
Range To
100.70.16.255
Prefix
100.70.18.0/24
Range From
100.70.18.0
Range To
100.70.18.255
Prefix
100.70.20.0/24
Range From
100.70.20.0
Range To
100.70.20.255
Prefix
100.70.22.0/24
Range From
100.70.22.0
Range To
100.70.22.255
Prefix
100.70.24.0/24
Range From
100.70.24.0
Range To
100.70.24.255
Showing 10 of 6,734 Results View More >

Active Prefixes IPv6

Prefix
Range From
Range To
Prefix
2001:428::/37
Range From
2001:428::
Range To
2001:428:7ff:ffff:ffff:ffff:ffff:ffff
Prefix
2001:428:1000::/38
Range From
2001:428:1000::
Range To
2001:428:13ff:ffff:ffff:ffff:ffff:ffff
Prefix
2001:428:1400::/47
Range From
2001:428:1400::
Range To
2001:428:1401:ffff:ffff:ffff:ffff:ffff
Prefix
2001:428:1402::/56
Range From
2001:428:1402::
Range To
2001:428:1402:ff:ffff:ffff:ffff:ffff
Prefix
2001:428:1402:100::/63
Range From
2001:428:1402:100::
Range To
2001:428:1402:101:ffff:ffff:ffff:ffff
Prefix
2001:428:1402:1000::/52
Range From
2001:428:1402:1000::
Range To
2001:428:1402:1fff:ffff:ffff:ffff:ffff
Prefix
2001:428:1402:102::/64
Range From
2001:428:1402:102::
Range To
2001:428:1402:102:ffff:ffff:ffff:ffff
Prefix
2001:428:1402:104::/62
Range From
2001:428:1402:104::
Range To
2001:428:1402:107:ffff:ffff:ffff:ffff
Prefix
2001:428:1402:108::/61
Range From
2001:428:1402:108::
Range To
2001:428:1402:10f:ffff:ffff:ffff:ffff
Prefix
2001:428:1402:110::/60
Range From
2001:428:1402:110::
Range To
2001:428:1402:11f:ffff:ffff:ffff:ffff
Showing 10 of 551 Results View More >