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CIDR Range

104.28.101.128/26

64 IPs /26 Cloudflare, Inc. AS13335 Japan ARIN
Addresses
64
64
IP Range
104.28.101.128
→ 104.28.101.191
Sub-ranges
39+
within this block
PTR Density
0.0%
0 of 64 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.

73/100
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 104.28.101.128/26

CIDRIPsOrganizationASNCountry
104.28.101.152/29 8 Cloudflare, Inc. AS13335 US
104.28.101.160/30 4 Cloudflare, Inc. AS13335 US
104.28.101.144/30 4 Cloudflare, Inc. AS13335 US
104.28.101.174/31 2 Cloudflare, Inc. AS13335 US
104.28.101.172/31 2 Cloudflare, Inc. AS13335 US
104.28.101.142/31 2 Cloudflare, Inc. AS13335 US
104.28.101.148/31 2 Cloudflare, Inc. AS13335 US
104.28.101.170/31 2 Cloudflare, Inc. AS13335 US
104.28.101.168/31 2 Cloudflare, Inc. AS13335 US
104.28.101.166/31 2 Cloudflare, Inc. AS13335 US
104.28.101.176/31 2 Cloudflare, Inc. AS13335 US
104.28.101.178/31 2 Cloudflare, Inc. AS13335 US
104.28.101.164/31 2 Cloudflare, Inc. AS13335 US
104.28.101.182/31 2 Cloudflare, Inc. AS13335 US
104.28.101.180/31 2 Cloudflare, Inc. AS13335 US
104.28.101.184/32 1 Cloudflare, Inc. AS13335 US
104.28.101.185/32 1 Cloudflare, Inc. AS13335 US
104.28.101.187/32 1 Cloudflare, Inc. AS13335 US
104.28.101.188/32 1 Cloudflare, Inc. AS13335 US
104.28.101.189/32 1 Cloudflare, Inc. AS13335 US
104.28.101.190/32 1 Cloudflare, Inc. AS13335 US
104.28.101.186/32 1 Cloudflare, Inc. AS13335 US
104.28.101.128/32 1 Cloudflare, Inc. AS13335 US
104.28.101.129/32 1 Cloudflare, Inc. AS13335 US
104.28.101.130/32 1 Cloudflare, Inc. AS13335 US
104.28.101.131/32 1 Cloudflare, Inc. AS13335 US
104.28.101.132/32 1 Cloudflare, Inc. AS13335 US
104.28.101.133/32 1 Cloudflare, Inc. AS13335 US
104.28.101.134/32 1 Cloudflare, Inc. AS13335 US
104.28.101.135/32 1 Cloudflare, Inc. AS13335 US
104.28.101.136/32 1 Cloudflare, Inc. AS13335 US
104.28.101.137/32 1 Cloudflare, Inc. AS13335 US
104.28.101.138/32 1 Cloudflare, Inc. AS13335 US
104.28.101.139/32 1 Cloudflare, Inc. AS13335 US
104.28.101.140/32 1 Cloudflare, Inc. AS13335 US
104.28.101.141/32 1 Cloudflare, Inc. AS13335 US
104.28.101.150/32 1 Cloudflare, Inc. AS13335 US
104.28.101.151/32 1 Cloudflare, Inc. AS13335 US
104.28.101.191/32 1 Cloudflare, Inc. AS13335 US

All 64 IP addresses in 104.28.101.128/26

104.28.101.128 104.28.101.129 104.28.101.130 104.28.101.131 104.28.101.132 104.28.101.133 104.28.101.134 104.28.101.135 104.28.101.136 104.28.101.137 104.28.101.138 104.28.101.139 104.28.101.140 104.28.101.141 104.28.101.142 104.28.101.143 104.28.101.144 104.28.101.145 104.28.101.146 104.28.101.147 104.28.101.148 104.28.101.149 104.28.101.150 104.28.101.151 104.28.101.152 104.28.101.153 104.28.101.154 104.28.101.155 104.28.101.156 104.28.101.157 104.28.101.158 104.28.101.159 104.28.101.160 104.28.101.161 104.28.101.162 104.28.101.163 104.28.101.164 104.28.101.165 104.28.101.166 104.28.101.167 104.28.101.168 104.28.101.169 104.28.101.170 104.28.101.171 104.28.101.172 104.28.101.173 104.28.101.174 104.28.101.175 104.28.101.176 104.28.101.177 104.28.101.178 104.28.101.179 104.28.101.180 104.28.101.181 104.28.101.182 104.28.101.183 104.28.101.184 104.28.101.185 104.28.101.186 104.28.101.187 104.28.101.188 104.28.101.189 104.28.101.190 104.28.101.191

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 104.28.101.0/24.

Announced prefix
104.28.101.0/24
Origin AS
AS13335
Announcement samples
5,471
Last seen
2026-07-24 03:55:18

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 104.28.101.128/26?

104.28.101.128/26 is a CIDR network block containing 64 IPv4 addresses (from 104.28.101.128 to 104.28.101.191). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 104.28.101.128/26 network?

The 104.28.101.128/26 range is allocated to Cloudflare, Inc. and announced via AS13335 from Japan.

How many IP addresses are in 104.28.101.128/26?

104.28.101.128/26 contains exactly 64 usable IPv4 addresses. A /26 prefix length means 64 addresses are covered by this single routing entry.

Last updated: 2026-07-24 05:25:31 UTC
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