AS3561 is the autonomous system of CenturyLink Communications, LLC. It holds 6,361,088 IPv4 addresses in 1,155 prefixes, mainly in 
United States.
By IPv4 addresses the network ranks #76 worldwide and #27 of 18,202 networks in United States. That is 0.43% of the country’s IPv4 space.
The network spreads across six or more countries: United States 97%, United Kingdom 1.1%, Canada 0.56%.
The largest block is 208.144.236.0 to 208.150.77.255 with 352,768 addresses, geolocated to Ashburn.
- IPv4 addresses
- 6,361,088
- IPv4 prefixes
- 1,155
- World rank
- #76
- Country share
- 0.43%
Addresses by country
- United States 97%
United Kingdom 1.1%
Canada 0.56%
Australia 0.47%
Singapore 0.27%
Japan 0.20%
Largest blocks
- 208.144.236.0 Ashburn352,768
- 206.99.128.0 Ashburn282,624
- 216.88.163.0 Ashburn220,416
- 208.133.36.0 Ashburn185,344
- 207.0.0.0 Ashburn155,648
- 206.25.140.0 Ashburn136,704
- 64.242.44.0 Ashburn119,808
- 208.172.0.0 Chicago114,688
Networks of similar size
- AS33915 Vodafone Libertel B.V.
6,588,928 - AS2828 Verizon Business6,532,864
- AS3301 Telia Company AB
6,525,696 - AS1257 Tele2 Sverige AB6,458,880
- AS36992 ETISALAT MISR
6,318,848 - AS1540 Headquarters, USAISC6,303,232
- AS45090 Shenzhen Tencent Computer Systems Company Limited
6,171,904 - AS9829 Bharat Sanchar Nigam Ltd
6,129,801
IPv4 prefixes
- 5.157.164.0/22
- 23.26.66.0/24
- 23.26.136.0/24
- 23.26.202.0/24
- 23.27.55.0/24
- 23.27.115.0/24
- 23.27.130.0/24
- 23.230.194.0/24
- 23.230.243.0/24
- 45.38.5.0/24
- 45.38.28.0/24
- 45.38.49.0/24
- 45.38.61.0/24
- 45.38.66.0/24
- 45.38.71.0/24
- 45.38.108.0/24
- 45.38.144.0/24
- 45.38.147.0/24
- 45.38.172.0/24
- 45.38.247.0/24
- 45.38.250.0/24
- 45.39.54.0/24
- 45.39.61.0/24
- 45.39.68.0/24
- 45.39.88.0/23
- 45.39.97.0/24
- 45.39.133.0/24
- 45.39.160.0/24
- 45.39.177.0/24
- 45.39.193.0/24
- 50.114.32.0/24
- 50.114.165.0/24
- 50.114.173.0/24
- 50.114.210.0/24
- 50.117.28.0/24
- 50.117.44.0/24
- 50.117.73.0/24
- 50.117.97.0/24
- 50.117.100.0/24
- 50.117.105.0/24
- 50.118.215.0/24
- 62.216.64.0/21
- 63.128.4.0/23
- 63.128.6.0/24
- 63.128.13.0/24
- 63.128.15.0/24
- 63.128.16.0/22
- 63.128.22.0/23
- 63.128.25.0/24
- 63.128.26.0/23
- 63.128.28.0/22
- 63.128.32.0/23
- 63.128.36.0/22
- 63.128.40.0/21
- 63.128.48.0/20
- 63.128.64.0/19
- 63.128.96.0/22
- 63.128.100.0/23
- 63.128.104.0/21
- 63.128.112.0/20
- 63.128.128.0/23
- 63.128.131.0/24
- 63.128.132.0/22
- 63.128.136.0/21
- 63.128.144.0/20
- 63.128.160.0/21
- 63.128.168.0/23
- 63.128.171.0/24
- 63.128.172.0/22
- 63.128.176.0/20
- 63.128.192.0/18
- 63.136.0.0/18
- 63.136.64.0/19
- 63.136.96.0/20
- 63.136.120.0/21
- 63.136.128.0/17
- 63.137.0.0/18
- 63.137.64.0/21
- 63.137.72.0/22
- 63.137.76.0/24
- 63.137.78.0/23
- 63.137.80.0/20
- 63.137.96.0/20
- 63.137.112.0/22
- 63.137.116.0/23
- 63.137.119.0/24
- 63.137.120.0/21
- 63.137.128.0/18
- 63.137.192.0/19
- 63.137.224.0/22
- 63.137.228.0/24
- 63.137.230.0/23
- 63.137.232.0/21
- 63.137.240.0/20
- 63.146.199.0/24
- 63.235.144.0/24
- 64.14.0.0/20
- 64.14.16.0/23
- 64.14.18.0/24
- 64.14.20.0/22
- 64.14.24.0/22
- 64.14.29.0/24
- 64.14.30.0/23
- 64.14.32.0/19
- 64.14.64.0/22
- 64.14.69.0/24
- 64.14.70.0/23
- 64.14.75.0/24
- 64.14.76.0/23
- 64.14.80.0/20
- 64.14.96.0/19
- 64.14.128.0/20
- 64.14.145.0/24
- 64.14.146.0/23
- 64.14.148.0/22
- 64.14.152.0/21
- 64.14.160.0/23
- 64.14.165.0/24
- 64.14.166.0/23
- 64.14.168.0/21
- 64.14.176.0/20
- 64.14.192.0/19
- 64.14.224.0/22
- 64.14.229.0/24
- 64.14.230.0/23
- 64.14.232.0/22
- 64.14.236.0/24
- 64.14.238.0/23
- 64.14.240.0/20
- 64.15.160.0/19
- 64.15.192.0/20
- 64.15.224.0/19
- 64.22.128.0/21
- 64.22.136.0/23
- 64.22.139.0/24
- 64.22.140.0/22
- 64.22.144.0/22
- 64.22.149.0/24
- 64.22.150.0/23
- 64.22.152.0/23
- 64.22.156.0/22
- 64.27.160.0/20
- 64.28.64.0/20
- 64.28.80.0/22
- 64.28.84.0/23
- 64.28.86.0/24
- 64.28.88.0/21
- 64.29.68.0/23
- 64.29.71.0/24
- 64.29.72.0/22
- 64.29.76.0/24
- 64.29.84.0/22
- 64.29.89.0/24
- 64.29.94.0/24
- 64.37.192.0/22
- 64.37.197.0/24
- 64.37.198.0/23
- 64.37.200.0/22
- 64.37.205.0/24
- 64.37.206.0/23
- 64.37.208.0/23
- 64.37.211.0/24
- 64.37.212.0/22
- 64.37.216.0/21
- 64.37.224.0/22
- 64.37.228.0/23
- 64.37.230.0/24
- 64.37.232.0/21
- 64.37.240.0/20
- 64.39.32.0/20
- 64.39.48.0/23
- 64.39.50.0/24
- 64.39.52.0/22
- 64.39.56.0/21
- 64.41.128.0/19
- 64.41.160.0/20
- 64.41.176.0/22
- 64.41.180.0/24
- 64.41.183.0/24
- 64.41.184.0/21
- 64.41.192.0/20
- 64.41.208.0/21
- 64.41.216.0/23
- 64.41.219.0/24
- 64.41.220.0/22
- 64.41.224.0/19
- 64.56.192.0/20
- 64.58.64.0/19
- 64.68.64.0/19
- 64.70.0.0/21
- 64.70.8.0/22
- 64.70.12.0/24
- 64.70.14.0/23
- 64.70.16.0/20
- 64.70.32.0/20
- 64.70.48.0/22
- 64.70.52.0/23
- 64.70.55.0/24
- 64.70.57.0/24
- 64.70.58.0/23
- 64.70.60.0/22
- 64.70.64.0/19
- 64.70.96.0/20
- 64.75.0.0/21
- 64.75.8.0/22
- 64.75.12.0/23
- 64.75.14.0/24
- 64.75.16.0/22
- 64.75.20.0/23
- 64.75.22.0/24
- 64.75.24.0/23
- 64.75.27.0/24
- 64.75.28.0/22
- 64.75.32.0/21
- 64.75.40.0/22
- 64.75.44.0/23
- 64.75.46.0/24
- 64.75.48.0/20
- 64.79.161.0/24
- 64.79.162.0/23
- 64.79.164.0/23
- 64.79.166.0/24
- 64.79.169.0/24
- 64.79.171.0/24
- 64.79.172.0/22
- 64.85.64.0/18
- 64.89.32.0/20
- 64.202.245.0/24
- 64.209.128.0/22
- 64.209.132.0/23
- 64.209.136.0/24
- 64.209.138.0/23
- 64.209.140.0/24
- 64.209.143.0/24
- 64.209.160.0/19
- 64.209.192.0/20
- 64.209.224.0/20
- 64.210.160.0/21
- 64.210.168.0/23
- 64.210.170.0/24
- 64.210.172.0/22
- 64.210.176.0/20
- 64.210.192.0/19
- 64.210.224.0/20
- 64.210.240.0/22
- 64.210.244.0/23
- 64.210.247.0/24
- 64.210.248.0/21
- 64.211.224.0/19
- 64.240.0.0/18
- 64.240.64.0/21
- 64.240.72.0/22
- 64.240.76.0/24
- 64.240.78.0/23
- 64.240.80.0/20
- 64.240.96.0/19
- 64.240.128.0/19
- 64.240.160.0/20
- 64.240.176.0/21
- 64.240.184.0/22
- 64.240.189.0/24
- 64.240.190.0/23
- 64.240.192.0/19
- 64.240.224.0/22
- 64.240.228.0/23
- 64.240.232.0/21
- 64.240.240.0/20
- 64.241.0.0/18
- 64.241.64.0/19
- 64.241.96.0/20
- 64.241.112.0/21
- 64.241.122.0/23
- 64.241.124.0/22
- 64.241.128.0/17
- 64.242.0.0/19
- 64.242.32.0/21
- 64.242.40.0/24
- 64.242.44.0/22
- 64.242.48.0/20
- 64.242.64.0/18
- 64.242.128.0/17
- 64.243.0.0/16
- 66.35.192.0/19
- 66.35.224.0/20
- 66.35.240.0/21
- 66.35.248.0/22
- 66.35.252.0/23
- 66.35.254.0/24
- 66.37.192.0/19
- 66.100.0.0/17
- 66.100.128.0/18
- 66.100.192.0/20
- 66.100.208.0/22
- 66.100.212.0/23
- 66.100.214.0/24
- 66.100.216.0/21
- 66.100.224.0/19
- 66.101.0.0/16
- 66.119.32.0/20
- 66.128.64.0/20
and 855 more prefixes
Questions and answers
Who owns AS3561?
Autonomous system AS3561 is operated by CenturyLink Communications, LLC.
How many IP addresses does AS3561 have?
The network holds 6,361,088 IPv4 addresses in 1,155 prefixes.
Which country is AS3561 in?
The main country is United States, with addresses in 5 more countries.
How big is AS3561?
By IPv4 addresses it ranks #76 worldwide.
What is the largest address block of AS3561?
208.144.236.0 to 208.150.77.255, 352,768 addresses.