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AS3561

AS3561 is CenturyLink Communications, LLC.

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (3 Nov 2026)

Short answer

AS3561 belongs to CenturyLink Communications, LLC. DB-IP Lite attributes 6,338,560 IPv4 addresses in 522 ranges and no IPv6 ranges to it, all or nearly all of the IPv4 space in United States. The number is registered with ARIN in United States on 7 Oct 1998.

Facts for AS3561
Operator (DB-IP)CenturyLink Communications, LLC
IPv4 addresses6,338,560
IPv4 ranges522
IPv6 ranges0
RegistryARIN
Registered7 Oct 1998
Registry countryUnited States (US)

Does it publish a geofeed?

We haven’t checked this network’s registry records for a geofeed yet. The Truth Check looks for one live for any address you test.

Shared addresses (CGNAT)

CenturyLink Communications, LLC hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists no IPv6 ranges for AS3561, so its customers reach websites over IPv4.

Where its IPv4 space is used, according to DB-IP

US97%
GB1%
CA0.54%
AU0.46%
SG0.23%
JP0.20%
DE0.04%
IN0.03%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
5.83.16.0 – 5.83.23.2555.83.16.0/212,048
5.157.164.0 – 5.157.167.2555.157.164.0/221,024
23.26.66.0 – 23.26.66.25523.26.66.0/24256
23.26.136.0 – 23.26.136.25523.26.136.0/24256
23.26.202.0 – 23.26.202.25523.26.202.0/24256
23.27.55.0 – 23.27.55.25523.27.55.0/24256
23.27.115.0 – 23.27.115.25523.27.115.0/24256
23.27.130.0 – 23.27.130.25523.27.130.0/24256
23.230.194.0 – 23.230.194.25523.230.194.0/24256
23.230.243.0 – 23.230.243.25523.230.243.0/24256
37.49.144.0 – 37.49.144.25537.49.144.0/24256
37.49.147.0 – 37.49.147.25537.49.147.0/24256
45.38.5.0 – 45.38.5.25545.38.5.0/24256
45.38.28.0 – 45.38.28.25545.38.28.0/24256
45.38.49.0 – 45.38.49.25545.38.49.0/24256
45.38.61.0 – 45.38.61.25545.38.61.0/24256
45.38.66.0 – 45.38.66.25545.38.66.0/24256
45.38.71.0 – 45.38.71.25545.38.71.0/24256
45.38.108.0 – 45.38.108.25545.38.108.0/24256
45.38.144.0 – 45.38.144.25545.38.144.0/24256
45.38.147.0 – 45.38.147.25545.38.147.0/24256
45.38.172.0 – 45.38.172.25545.38.172.0/24256
45.38.247.0 – 45.38.247.25545.38.247.0/24256
45.38.250.0 – 45.38.250.25545.38.250.0/24256
45.39.54.0 – 45.39.54.25545.39.54.0/24256
45.39.61.0 – 45.39.61.25545.39.61.0/24256
45.39.68.0 – 45.39.68.25545.39.68.0/24256
45.39.88.0 – 45.39.89.25545.39.88.0/23512
45.39.97.0 – 45.39.97.25545.39.97.0/24256
45.39.133.0 – 45.39.133.25545.39.133.0/24256
45.39.160.0 – 45.39.160.25545.39.160.0/24256
45.39.177.0 – 45.39.177.25545.39.177.0/24256
45.39.193.0 – 45.39.193.25545.39.193.0/24256
50.114.32.0 – 50.114.32.25550.114.32.0/24256
50.114.165.0 – 50.114.165.25550.114.165.0/24256
50.114.173.0 – 50.114.173.25550.114.173.0/24256
50.114.210.0 – 50.114.210.25550.114.210.0/24256
50.117.28.0 – 50.117.28.25550.117.28.0/24256
50.117.44.0 – 50.117.44.25550.117.44.0/24256
50.117.64.0 – 50.117.64.25550.117.64.0/24256
50.117.73.0 – 50.117.73.25550.117.73.0/24256
50.117.97.0 – 50.117.97.25550.117.97.0/24256
50.117.100.0 – 50.117.100.25550.117.100.0/24256
50.117.105.0 – 50.117.105.25550.117.105.0/24256
50.118.215.0 – 50.118.215.25550.118.215.0/24256
51.146.24.0 – 51.146.27.25551.146.24.0/221,024
51.241.176.0 – 51.241.179.25551.241.176.0/221,024
51.241.248.0 – 51.241.251.25551.241.248.0/221,024
62.216.64.0 – 62.216.71.25562.216.64.0/212,048
63.128.4.0 – 63.128.6.25563.128.4.0/23, 63.128.6.0/24768
Showing 50 of 522 IPv4 and 0 of 0 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 4 Nov 2026