AS3561 CenturyLink Communications, LLC

CENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC · registered in the United States

IPv4 addresses6,397,9521,414 prefixes · 0.204% of announced IPv4

Rank in United States#27largest network in US by IPv4 space, of 18,338 · 0.47% of US

Rank worldwide#77of 79,396 networks with IPv4

IPv64 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS3561 in ASN lookup Look up an IP in this network (5.83.16.1) All networks in United States

IPv4 prefixes

First 500 of 1,414 prefixes, in address order.

5.83.16.0/21
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
37.49.144.0/24
37.49.147.0/24
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
51.146.24.0/22
51.241.176.0/22
51.241.248.0/22
62.216.64.0/21
63.128.4.0/23
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63.128.13.0/24
63.128.15.0/24
63.128.16.0/22
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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
63.128.64.0/20
63.128.80.0/22
63.128.84.0/23
63.128.86.0/23
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63.128.90.0/23
63.128.92.0/22
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
63.136.0.0/22
63.136.4.0/24
63.136.5.0/24
63.136.6.0/23
63.136.8.0/21
63.136.16.0/20
63.136.32.0/19
63.136.64.0/19
63.136.96.0/20
63.136.120.0/21
63.136.128.0/17
63.137.0.0/19
63.137.32.0/20
63.137.48.0/20
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
63.137.120.0/22
63.137.124.0/23
63.137.126.0/24
63.137.127.0/24
63.137.128.0/19
63.137.160.0/20
63.137.176.0/21
63.137.184.0/21
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
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64.14.70.0/23
64.14.75.0/24
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64.14.80.0/20
64.14.96.0/19
64.14.128.0/20
64.14.145.0/24
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64.14.148.0/22
64.14.152.0/21
64.14.160.0/23
64.14.165.0/24
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64.14.176.0/20
64.14.192.0/21
64.14.200.0/23
64.14.202.0/23
64.14.204.0/22
64.14.208.0/20
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
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64.14.240.0/20
64.15.160.0/19
64.15.192.0/20
64.15.224.0/23
64.15.226.0/23
64.15.228.0/22
64.15.232.0/21
64.15.240.0/20
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
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64.28.88.0/21
64.29.68.0/23
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64.29.84.0/22
64.37.192.0/22
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64.37.216.0/21
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64.37.240.0/20
64.39.32.0/20
64.39.48.0/23
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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
64.70.96.0/22
64.70.100.0/23
64.70.102.0/24
64.70.103.0/24
64.70.104.0/21
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
66.128.224.0/20
66.150.105.0/24
66.180.130.0/23
66.207.180.0/22
67.54.0.0/17
67.130.0.0/24
68.68.99.0/24
68.71.192.0/21
69.32.180.0/23
69.46.65.0/24
69.46.76.0/24
72.5.203.0/24
72.35.0.0/21
72.35.16.0/20
77.36.124.0/22
77.111.84.0/22
80.174.176.0/22
81.161.4.0/22
82.118.64.0/21
82.118.72.0/21
82.118.80.0/23
82.118.82.0/23
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89.40.208.0/24
93.120.96.0/22
96.126.134.0/24
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100.42.20.0/23
100.42.23.0/24
104.164.158.0/24
104.252.0.0/24
104.252.55.0/24
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104.253.2.0/24
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108.165.6.0/24
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109.166.40.0/21
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109.203.161.0/24
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130.254.32.0/21
136.0.107.0/24
136.0.191.0/24
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136.0.242.0/24
140.228.18.0/23
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142.111.4.0/24
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143.203.176.0/22
144.225.106.0/24
144.225.166.0/23
144.225.168.0/22
144.225.252.0/23
149.19.157.0/24
149.19.158.0/23
151.248.72.0/21
151.248.80.0/21
151.248.88.0/22
162.33.165.0/24
162.33.166.0/24
165.140.143.0/24
165.193.0.0/20
165.193.16.0/23
165.193.19.0/24
165.193.20.0/22
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165.193.32.0/19
165.193.64.0/21
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165.193.96.0/21
165.193.104.0/22
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165.193.128.0/20
165.193.144.0/20
165.193.160.0/20
165.193.176.0/21
165.193.184.0/22
165.193.188.0/24
165.193.190.0/23
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165.193.224.0/20
165.193.240.0/21
165.193.248.0/23
165.193.251.0/24
165.193.252.0/22
166.0.117.0/24
166.0.121.0/24
166.0.122.0/24
166.1.102.0/24
166.1.248.0/24
166.49.0.0/17
166.63.128.0/19
167.215.0.0/16
167.216.128.0/18
167.216.192.0/20
167.216.208.0/20
167.216.224.0/19
168.93.206.0/23
172.252.61.0/24
172.252.93.0/24
172.252.251.0/24
172.252.252.0/23
175.110.100.0/22
176.46.129.0/24
176.46.130.0/24
176.46.133.0/24
176.46.135.0/24
176.46.137.0/24
176.118.80.0/21
178.157.64.0/22
178.159.64.0/22
178.159.72.0/22
185.123.144.0/22
185.123.152.0/22
185.200.236.0/22
188.119.144.0/22
188.220.28.0/23
188.220.44.0/23
188.221.68.0/23

IPv6 prefixes

All 1 prefix.

2001:460:100::/46

Other ASNs named CenturyLink Communications, LLC

27 other networks use the same organisation name; together with AS3561 they announce 24,368,896 IPv4 addresses.

ASNNameIPv4 addresses

AS209CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC US15,739,648

AS22561CENTURYLINK-LEGACY-LIGHTCORE - CenturyLink Communications, LLC US1,228,800

AS2379CENTURYLINK-LEGACY-EMBARQ-WNPK - CenturyLink Communications, LLC US547,840

AS11398CENTURYLINK-LEGACY-EMBARQ-LVGS - CenturyLink Communications, LLC US121,088

AS17402CENTURYLINK-LEGACY-EMBARQ-CHSK - CenturyLink Communications, LLC US68,864

AS14921CENTURYLINK-LEGACY-EMBARQ-HDRV - CenturyLink Communications, LLC US61,440

AS6222CENTURYLINK-LEGACY-EMBARQ-CLTN - CenturyLink Communications, LLC US59,136

AS4911CENTURYLINK-LEGACY-QWEST-SPA-MARION - CenturyLink Communications, LLC US16,384

AS16941CENTURYLINK-LEGACY-FUSEPOINT-CTS-CANADA-POP - CenturyLink Communications, LLC US15,616

AS7359CENTURYLINK-SPA-ZUNI - CenturyLink Communications, LLC US14,592

AS4015CENTURYLINK-LEGACY-QWEST-SPA-OMAHA - CenturyLink Communications, LLC US14,336

AS3910CENTURYLINK-EUROPE-LEGACY-QWEST - CenturyLink Communications, LLC US13,824

AS22186CENTURYLINK-LEGACY-EMBARQ-KSGRNR - CenturyLink Communications, LLC US13,312

AS393789CENTURYLINK-CHIA-PROJECT - CenturyLink Communications, LLC US13,312

AS23126CENTURYLINK-CLEC-VARIOUS-SHARED-USE-AND-LOCATIONS - CenturyLink Communications, LLC US8,960

AS3909CENTURYLINK-LEGACY-QWEST-VDOC - CenturyLink Communications, LLC US6,912

AS4282CENTURYLINK-TSDS-FLFTMY - CenturyLink Communications, LLC US5,888

AS4283CENTURYLINK-TSDS-LSVG - CenturyLink Communications, LLC US4,864

AS4284CENTURYLINK-TSDS-FLTLHS - CenturyLink Communications, LLC US4,608

AS13787CENTURYLINK-LEGACY-EMBARQ-JCTY - CenturyLink Communications, LLC US3,328

AS6223CENTURYLINK-MTIPS1-STN - CenturyLink Communications, LLC US2,560

AS5778CENTURYLINK-LEGACY-EMBARQ-RCMT - CenturyLink Communications, LLC US1,792

AS7191CENTURYLINK-PRISM - CenturyLink Communications, LLC US1,536

AS4297CENTURYLINK-MTIPS4-HLR - CenturyLink Communications, LLC US1,024

AS7988CENTURYLINK-SPA-SINGAPORE - CenturyLink Communications, LLC US768

AS6224CENTURYLINK-MTIPS2-CHI - CenturyLink Communications, LLC US256

AS16835CENTURYLINK-LEGACY-MR-MEBLANE-AND-RCMT - CenturyLink Communications, LLC US256

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AS11427#28 TWC-11427-TEXAS - Charter Communications Inc5,789,696

AS31898#29 ORACLE-BMC-31898 - Oracle Corporation5,754,624

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources