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CIDR Range

104.28.221.224/27

Addresses
32
32
Sub-ranges
47+
within this block
PTR Density
0.0%
0 of 32 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.

68/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 104.28.221.224/27

CIDRIPsOrganizationASNCountry
104.28.221.240/29 8 Cloudflare, Inc. AS13335 US
104.28.221.240/29 8 Cloudflare, Inc. AS13335 CH
104.28.221.240/29 8 Cloudflare, Inc. AS13335 CH
104.28.221.228/30 4 Cloudflare, Inc. AS13335 DZ
104.28.221.252/30 4 Cloudflare, Inc. AS13335 US
104.28.221.228/30 4 Cloudflare, Inc. AS13335 US
104.28.221.252/30 4 Cloudflare, Inc. AS13335 US
104.28.221.228/30 4 Cloudflare, Inc. AS13335 DZ
104.28.221.236/31 2 Cloudflare, Inc. AS13335 ML
104.28.221.236/31 2 Cloudflare, Inc. AS13335 US
104.28.221.236/31 2 Cloudflare, Inc. AS13335 ML
104.28.221.248/31 2 Cloudflare, Inc. AS13335 CH
104.28.221.248/31 2 Cloudflare, Inc. AS13335 US
104.28.221.248/31 2 Cloudflare, Inc. AS13335 CH
104.28.221.250/31 2 Cloudflare, Inc. AS13335 US
104.28.221.250/31 2 Cloudflare, Inc. AS13335 US
104.28.221.252/31 2 Cloudflare, Inc. AS13335 US
104.28.221.252/31 2 Cloudflare, Inc. AS13335 US
104.28.221.250/31 2 Cloudflare, Inc. AS13335 US
104.28.221.234/31 2 Cloudflare, Inc. AS13335 ML
104.28.221.234/31 2 Cloudflare, Inc. AS13335 US
104.28.221.234/31 2 Cloudflare, Inc. AS13335 ML
104.28.221.224/31 2 Cloudflare, Inc. AS13335 US
104.28.221.224/31 2 Cloudflare, Inc. AS13335 US
104.28.221.224/31 2 Cloudflare, Inc. AS13335 US
104.28.221.227/32 1 Cloudflare, Inc. AS13335 DZ
104.28.221.227/32 1 Cloudflare, Inc. AS13335 US
104.28.221.227 1 Cloudflare, Inc. AS13335 DZ
104.28.221.226/32 1 Cloudflare, Inc. AS13335 US
104.28.221.226 1 Cloudflare, Inc. AS13335 US
104.28.221.254/32 1 Cloudflare, Inc. AS13335 US
104.28.221.254/32 1 Cloudflare, Inc. AS13335 US
104.28.221.255/32 1 Cloudflare, Inc. AS13335 US
104.28.221.226/32 1 Cloudflare, Inc. AS13335 US
104.28.221.232 1 Cloudflare, Inc. AS13335 DZ
104.28.221.233/32 1 Cloudflare, Inc. AS13335 ML
104.28.221.233/32 1 Cloudflare, Inc. AS13335 US
104.28.221.238 1 Cloudflare, Inc. AS13335 ML
104.28.221.238/32 1 Cloudflare, Inc. AS13335 US
104.28.221.238/32 1 Cloudflare, Inc. AS13335 ML
104.28.221.239 1 Cloudflare, Inc. AS13335 CH
104.28.221.239/32 1 Cloudflare, Inc. AS13335 US
104.28.221.239/32 1 Cloudflare, Inc. AS13335 CH
104.28.221.233 1 Cloudflare, Inc. AS13335 ML
104.28.221.232/32 1 Cloudflare, Inc. AS13335 DZ
104.28.221.232/32 1 Cloudflare, Inc. AS13335 US
104.28.221.255/32 1 Cloudflare, Inc. AS13335 CH

Geolocation

All 32 IP addresses in 104.28.221.224/27

Not announced as an exact prefix — covered by the announced supernet 104.28.221.0/24.

Announced prefix
Origin AS
Announcement samples
5,913
Last seen
2026-07-28 18:44:09

RIR Ownership History

Atom feed ⇲

Allocation changes captured weekly from regional internet registry (RIR) delegation files.

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

Frequently Asked Questions

What is 104.28.221.224/27?

104.28.221.224/27 is a CIDR network block containing 32 IPv4 addresses (from 104.28.221.224 to 104.28.221.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 104.28.221.224/27 network?

The 104.28.221.224/27 range is allocated to Cloudflare, Inc. and announced via AS13335 from Switzerland.

How many IP addresses are in 104.28.221.224/27?

104.28.221.224/27 contains exactly 32 usable IPv4 addresses. A /27 prefix length means 32 addresses are covered by this single routing entry.

Last updated: 2026-07-28 18:55:30 UTC
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