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CIDR Range

1.0.0.0/8

16.78M IPs /8 Cloudflare, Inc. AS13335 Australia APNIC
Addresses
16,777,216
16.78M
IP Range
1.0.0.0
→ 1.255.255.255
Sub-ranges
50+
within this block

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.

71/100
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 1.0.0.0/8

CIDRIPsOrganizationASNCountry
1.128.0.0/11 2.10M Cloudflare, Inc. AS13335 AU
1.128.0.0/11 2.10M Telstra Limited AS1221 AU
1.128.0.0/11 2.10M Cloudflare, Inc. AS1221 AU
1.224.0.0/11 2.10M Cloudflare, Inc. AS13335 KR
1.80.0.0/12 1.05M Cloudflare, Inc. AS13335 CN
1.96.0.0/12 1.05M Cloudflare, Inc. AS13335 KR
1.96.0.0/12 1.05M Korea Telecom AS4766 KR
1.96.0.0/12 1.05M Cloudflare, Inc. AS13335 KR
1.96.0.0/12 1.05M Cloudflare, Inc. AS4766 KR
1.128.0.0/12 1.05M Telstra Limited AS1221 AU
1.144.0.0/12 1.05M Cloudflare, Inc. AS13335 AU
1.160.0.0/12 1.05M Cloudflare, Inc. AS13335 TW
1.160.0.0/12 1.05M Data Communication Business Group AS3462 TW
1.160.0.0/12 1.05M Cloudflare, Inc. AS13335 TW
1.160.0.0/12 1.05M Cloudflare, Inc. AS3462 TW
1.208.0.0/12 1.05M Cloudflare, Inc. AS13335 KR
1.24.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.24.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.56.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.56.0.0/13 524.3K CHINA UNICOM China169 Backbone AS4837 CN
1.56.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.56.0.0/13 524.3K Cloudflare, Inc. AS4837 CN
1.72.0.0/13 524.3K Cloudflare, Inc. AS13335 JP
1.72.0.0/13 524.3K Cloudflare, Inc. AS13335 JP
1.80.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.120.0.0/13 524.3K Cloudflare, Inc. AS13335 AU
1.120.0.0/13 524.3K Telstra Limited AS1221 AU
1.120.0.0/13 524.3K Cloudflare, Inc. AS1221 AU
1.128.0.0/13 524.3K Telstra Limited AS1221 AU
1.128.0.0/13 524.3K Cloudflare, Inc. AS13335 AU
1.144.0.0/13 524.3K Telstra Limited AS1221 AU
1.192.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.192.0.0/13 524.3K Cloudflare, Inc. AS13335 CN
1.240.0.0/13 524.3K Cloudflare, Inc. AS13335 KR
1.12.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.16.0.0/14 262.1K Cloudflare, Inc. AS13335 KR
1.16.0.0/14 262.1K Cloudflare, Inc. AS13335 AU
1.28.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.40.0.0/14 262.1K Cloudflare, Inc. AS13335 AU
1.40.0.0/14 262.1K Microplex PTY LTD AS4804 AU
1.40.0.0/14 262.1K Cloudflare, Inc. AS4804 AU
1.48.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.52.0.0/14 262.1K FPT Telecom Company AS18403 VN
1.52.0.0/14 262.1K Cloudflare, Inc. AS18403 VN
1.56.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.60.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.68.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.68.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.84.0.0/14 262.1K Cloudflare, Inc. AS13335 CN
1.84.0.0/14 262.1K Chinanet AS4134 CN

First 256 of 16,777,216 IP addresses in 1.0.0.0/8

1.0.0.0 1.0.0.1 1.0.0.2 1.0.0.3 1.0.0.4 1.0.0.5 1.0.0.6 1.0.0.7 1.0.0.8 1.0.0.9 1.0.0.10 1.0.0.11 1.0.0.12 1.0.0.13 1.0.0.14 1.0.0.15 1.0.0.16 1.0.0.17 1.0.0.18 1.0.0.19 1.0.0.20 1.0.0.21 1.0.0.22 1.0.0.23 1.0.0.24 1.0.0.25 1.0.0.26 1.0.0.27 1.0.0.28 1.0.0.29 1.0.0.30 1.0.0.31 1.0.0.32 1.0.0.33 1.0.0.34 1.0.0.35 1.0.0.36 1.0.0.37 1.0.0.38 1.0.0.39 1.0.0.40 1.0.0.41 1.0.0.42 1.0.0.43 1.0.0.44 1.0.0.45 1.0.0.46 1.0.0.47 1.0.0.48 1.0.0.49 1.0.0.50 1.0.0.51 1.0.0.52 1.0.0.53 1.0.0.54 1.0.0.55 1.0.0.56 1.0.0.57 1.0.0.58 1.0.0.59 1.0.0.60 1.0.0.61 1.0.0.62 1.0.0.63 1.0.0.64 1.0.0.65 1.0.0.66 1.0.0.67 1.0.0.68 1.0.0.69 1.0.0.70 1.0.0.71 1.0.0.72 1.0.0.73 1.0.0.74 1.0.0.75 1.0.0.76 1.0.0.77 1.0.0.78 1.0.0.79 1.0.0.80 1.0.0.81 1.0.0.82 1.0.0.83 1.0.0.84 1.0.0.85 1.0.0.86 1.0.0.87 1.0.0.88 1.0.0.89 1.0.0.90 1.0.0.91 1.0.0.92 1.0.0.93 1.0.0.94 1.0.0.95 1.0.0.96 1.0.0.97 1.0.0.98 1.0.0.99 1.0.0.100 1.0.0.101 1.0.0.102 1.0.0.103 1.0.0.104 1.0.0.105 1.0.0.106 1.0.0.107 1.0.0.108 1.0.0.109 1.0.0.110 1.0.0.111 1.0.0.112 1.0.0.113 1.0.0.114 1.0.0.115 1.0.0.116 1.0.0.117 1.0.0.118 1.0.0.119 1.0.0.120 1.0.0.121 1.0.0.122 1.0.0.123 1.0.0.124 1.0.0.125 1.0.0.126 1.0.0.127 1.0.0.128 1.0.0.129 1.0.0.130 1.0.0.131 1.0.0.132 1.0.0.133 1.0.0.134 1.0.0.135 1.0.0.136 1.0.0.137 1.0.0.138 1.0.0.139 1.0.0.140 1.0.0.141 1.0.0.142 1.0.0.143 1.0.0.144 1.0.0.145 1.0.0.146 1.0.0.147 1.0.0.148 1.0.0.149 1.0.0.150 1.0.0.151 1.0.0.152 1.0.0.153 1.0.0.154 1.0.0.155 1.0.0.156 1.0.0.157 1.0.0.158 1.0.0.159 1.0.0.160 1.0.0.161 1.0.0.162 1.0.0.163 1.0.0.164 1.0.0.165 1.0.0.166 1.0.0.167 1.0.0.168 1.0.0.169 1.0.0.170 1.0.0.171 1.0.0.172 1.0.0.173 1.0.0.174 1.0.0.175 1.0.0.176 1.0.0.177 1.0.0.178 1.0.0.179 1.0.0.180 1.0.0.181 1.0.0.182 1.0.0.183 1.0.0.184 1.0.0.185 1.0.0.186 1.0.0.187 1.0.0.188 1.0.0.189 1.0.0.190 1.0.0.191 1.0.0.192 1.0.0.193 1.0.0.194 1.0.0.195 1.0.0.196 1.0.0.197 1.0.0.198 1.0.0.199 1.0.0.200 1.0.0.201 1.0.0.202 1.0.0.203 1.0.0.204 1.0.0.205 1.0.0.206 1.0.0.207 1.0.0.208 1.0.0.209 1.0.0.210 1.0.0.211 1.0.0.212 1.0.0.213 1.0.0.214 1.0.0.215 1.0.0.216 1.0.0.217 1.0.0.218 1.0.0.219 1.0.0.220 1.0.0.221 1.0.0.222 1.0.0.223 1.0.0.224 1.0.0.225 1.0.0.226 1.0.0.227 1.0.0.228 1.0.0.229 1.0.0.230 1.0.0.231 1.0.0.232 1.0.0.233 1.0.0.234 1.0.0.235 1.0.0.236 1.0.0.237 1.0.0.238 1.0.0.239 1.0.0.240 1.0.0.241 1.0.0.242 1.0.0.243 1.0.0.244 1.0.0.245 1.0.0.246 1.0.0.247 1.0.0.248 1.0.0.249 1.0.0.250 1.0.0.251 1.0.0.252 1.0.0.253 1.0.0.254 1.0.0.255 + 16.78M more (range too large to list inline)

BGP Routing

Live BGP anomalies →

This block is announced in BGP, observed across our RIPE RIS collectors.

Announced prefix
1.0.0.0/8
Origin AS
AS45820
Announcement samples
4
Last seen
2026-08-12 12:13:47

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 — CN
2026-05-10 New Allocation — KR
2026-05-10 New Allocation — SG
2026-05-10 New Allocation — US
2026-05-10 RIR Transfer apnic ripe
2026-05-10 RIR Transfer apnic arin
2026-05-10 Country Change AU US
2026-05-10 Country Change SE US

Frequently Asked Questions

What is 1.0.0.0/8?

1.0.0.0/8 is a CIDR network block containing 16,777,216 IPv4 addresses (from 1.0.0.0 to 1.255.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 1.0.0.0/8 network?

The 1.0.0.0/8 range is allocated to Cloudflare, Inc. and announced via AS13335 from Australia.

Last updated: 2026-09-15 03:09:06 UTC
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