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CIDR Range

23.53.120.0/21

Addresses
2,048
2.0K
Sub-ranges
15+
within this block
PTR Density
99.9%
2.0K 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 23.53.120.0/21

First and last addresses in 23.53.120.0/21

23.53.120.0/21 runs from 23.53.120.0 to 23.53.127.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 23.32.0.0/11.

Announced prefix
Origin AS
Announcement samples
21,717
Last seen
2026-11-04 23:20:32

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date Event From To
2026-05-10 New Allocation — US

Frequently Asked Questions

What is 23.53.120.0/21?

23.53.120.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 23.53.120.0 to 23.53.127.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 23.53.120.0/21 network?

The 23.53.120.0/21 range is allocated to Akamai International B.V. and announced via AS20940 from United States.

Last updated: 2026-11-05 00:09:07 UTC
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