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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
17,663,197
IPv4 Prefixes Announced
6,697
IPv6 Prefixes Announced
575
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#24 out of 75,559
Registry
Arin
Registered Country
US
Registration Date
1998-11-13
Registration Change
2018-10-04

Receiving From

ASN
Organisation
AS7018
AT&T Services, Inc.
AS3356
Level 3 Parent, LLC
AS7922
Comcast Cable Communications, LLC
AS174
Cogent Communications
AS2516
KDDI CORPORATION
AS209
CenturyLink Communications, LLC
AS1239
Sprint
AS1221
Telstra Corporation Limited
AS3209
Vodafone GmbH
AS10429
TELEFÔNICA BRASIL S.A
Showing 10 of 91 Results View More >

Transit To

ASN
Organisation
AS4297
CenturyLink Communications, LLC
AS53692
Interop Show Network
AS4296
CenturyLink Communications, LLC
AS7018
AT&T Services, Inc.
AS721
DoD Network Information Center
AS701
Verizon Business
AS6167
Verizon Business
AS3356
Level 3 Parent, LLC
AS22394
Verizon Business
AS209
CenturyLink Communications, LLC
Showing 10 of 1,164 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 6,725 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 575 Results View More >