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CIDR Range

212.124.240.0/21

Addresses
2,048
2.0K
Sub-ranges
50+
within this block
PTR Density
12.7%
260 of 2.0K IPs have PTR

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

81/100
Trusted
How this score is built

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 212.124.240.0/21

CIDRIPsOrganizationASNCountry
212.124.242.0/23 512 CenturyLink Communications, LLC AS3561 GB
212.124.244.0/24 256 CenturyLink Communications, LLC AS3561 GB
212.124.241.0/24 256 CenturyLink Communications, LLC AS3561 GB
212.124.240.0/25 128 CenturyLink Communications, LLC AS3561 GB
212.124.246.0/25 128 CenturyLink Communications, LLC AS3561 GB
212.124.245.0/25 128 CenturyLink Communications, LLC AS3561 GB
212.124.246.192/26 64 CenturyLink Communications, LLC AS3561 GB
212.124.245.192/26 64 CenturyLink Communications, LLC AS3561 GB
212.124.247.64/26 64 CenturyLink Communications, LLC AS3561 GB
212.124.240.224/27 32 CenturyLink Communications, LLC AS3561 GB
212.124.245.128/27 32 CenturyLink Communications, LLC AS3561 GB
212.124.246.128/27 32 CenturyLink Communications, LLC AS3561 GB
212.124.247.32/27 32 CenturyLink Communications, LLC AS3561 GB
212.124.240.128/27 32 CenturyLink Communications, LLC AS3561 GB
212.124.247.224/27 32 CenturyLink Communications, LLC AS3561 GB
212.124.246.176/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.245.160/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.247.192/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.247.176/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.247.16/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.240.208/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.240.176/28 16 CenturyLink Communications, LLC AS3561 GB
212.124.246.168/29 8 CenturyLink Communications, LLC AS3561 GB
212.124.247.216/29 8 CenturyLink Communications, LLC AS3561 GB
212.124.245.184/29 8 CenturyLink Communications, LLC AS3561 GB
212.124.247.160/29 8 CenturyLink Communications, LLC AS3561 GB
212.124.247.152/29 8 CenturyLink Communications, LLC AS3561 GB
212.124.247.128/29 8 CenturyLink Communications, LLC AS3561 GB
212.124.247.168/29 8 CenturyLink Communications, LLC AS3561 US
212.124.245.180/30 4 CenturyLink Communications, LLC AS3561 GB
212.124.247.8/30 4 CenturyLink Communications, LLC AS3561 GB
212.124.247.208/30 4 CenturyLink Communications, LLC AS3561 GB

Geolocation

First and last addresses in 212.124.240.0/21

212.124.240.0/21 runs from 212.124.240.0 to 212.124.247.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 212.124.224.0/19.

Announced prefix
Origin AS
Announcement samples
14,667
Last seen
2026-11-13 09:19:34

Frequently Asked Questions

What is 212.124.240.0/21?

212.124.240.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 212.124.240.0 to 212.124.247.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 212.124.240.0/21 network?

The 212.124.240.0/21 range is allocated to CenturyLink Communications, LLC and announced via AS3561 from United Kingdom.

Last updated: 2026-11-13 09:24:05 UTC
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