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CIDR Range

104.28.137.32/27

Addresses
32
32
Sub-ranges
50+
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 104.28.137.32/27

CIDRIPsOrganizationASNCountry
104.28.137.56/29 8 Cloudflare, Inc. AS13335 US
104.28.137.56/29 8 Cloudflare, Inc. AS13335 US
104.28.137.56/29 8 Cloudflare, Inc. AS13335 US
104.28.137.60/30 4 Cloudflare, Inc. AS13335 US
104.28.137.58/31 2 Cloudflare, Inc. AS13335 US
104.28.137.48/31 2 Cloudflare, Inc. AS13335 US
104.28.137.46/31 2 Cloudflare, Inc. AS13335 US
104.28.137.46/31 2 Cloudflare, Inc. AS13335 US
104.28.137.52/31 2 Cloudflare, Inc. AS13335 US
104.28.137.48/31 2 Cloudflare, Inc. AS13335 US
104.28.137.50/31 2 Cloudflare, Inc. AS13335 ZA
104.28.137.50/31 2 Cloudflare, Inc. AS13335 ZA
104.28.137.52/31 2 Cloudflare, Inc. AS13335 KR
104.28.137.52/31 2 Cloudflare, Inc. AS13335 KR
104.28.137.54/31 2 Cloudflare, Inc. AS13335 US
104.28.137.54/31 2 Cloudflare, Inc. AS13335 US
104.28.137.48/31 2 Cloudflare, Inc. AS13335 US
104.28.137.38/31 2 Cloudflare, Inc. AS13335 US
104.28.137.34/31 2 Cloudflare, Inc. AS13335 ZA
104.28.137.38/31 2 Cloudflare, Inc. AS13335 US
104.28.137.38/31 2 Cloudflare, Inc. AS13335 US
104.28.137.34/31 2 Cloudflare, Inc. AS13335 ZA
104.28.137.34/31 2 Cloudflare, Inc. AS13335 US
104.28.137.54 1 Cloudflare, Inc. AS13335 NL
104.28.137.55/32 1 Cloudflare, Inc. AS13335 US
104.28.137.51/32 1 Cloudflare, Inc. AS13335 US
104.28.137.36 1 Cloudflare, Inc. AS13335 AR
104.28.137.36/32 1 Cloudflare, Inc. AS13335 US
104.28.137.50/32 1 Cloudflare, Inc. AS13335 US
104.28.137.54/32 1 Cloudflare, Inc. AS13335 US
104.28.137.54/32 1 Cloudflare, Inc. AS13335 NL
104.28.137.33/32 1 Cloudflare, Inc. AS13335 ZA
104.28.137.57/32 1 Cloudflare, Inc. AS13335 US
104.28.137.32/32 1 Cloudflare, Inc. AS13335 US
104.28.137.32/32 1 Cloudflare, Inc. AS13335 IN
104.28.137.33 1 Cloudflare, Inc. AS13335 ZA
104.28.137.56/32 1 Cloudflare, Inc. AS13335 US
104.28.137.55/32 1 Cloudflare, Inc. AS13335 AR
104.28.137.44/32 1 Cloudflare, Inc. AS13335 DE
104.28.137.55 1 Cloudflare, Inc. AS13335 AR
104.28.137.33/32 1 Cloudflare, Inc. AS13335 US
104.28.137.36/32 1 Cloudflare, Inc. AS13335 AR
104.28.137.37 1 Cloudflare, Inc. AS13335 US
104.28.137.43 1 Cloudflare, Inc. AS13335 DE
104.28.137.42/32 1 Cloudflare, Inc. AS13335 FI
104.28.137.42/32 1 Cloudflare, Inc. AS13335 US
104.28.137.32 1 Cloudflare, Inc. AS13335 IN
104.28.137.41/32 1 Cloudflare, Inc. AS13335 FI
104.28.137.41/32 1 Cloudflare, Inc. AS13335 US
104.28.137.41 1 Cloudflare, Inc. AS13335 FI

Geolocation

All 32 IP addresses in 104.28.137.32/27

Not announced as an exact prefix — covered by the announced supernet 104.28.137.0/24.

Announced prefix
Origin AS
Announcement samples
5,742
Last seen
2026-07-26 08:03:44

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 104.28.137.32/27?

104.28.137.32/27 is a CIDR network block containing 32 IPv4 addresses (from 104.28.137.32 to 104.28.137.63). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 104.28.137.32/27 network?

The 104.28.137.32/27 range is allocated to Cloudflare, Inc. and announced via AS13335 from United States.

How many IP addresses are in 104.28.137.32/27?

104.28.137.32/27 contains exactly 32 usable IPv4 addresses. A /27 prefix length means 32 addresses are covered by this single routing entry.

Last updated: 2026-07-26 08:55:32 UTC
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