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CIDR Range

187.31.24.0/21

2.0K IPs /21 Oi S.A. - Em Recuperacao Judicial AS14571 Brazil LACNIC
Addresses
2,048
2.0K
IP Range
187.31.24.0
→ 187.31.31.255
Sub-ranges
8+
within this block
PTR Density
0.0%
0 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.

59/100
Caution
How this score is built

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

Ranges inside 187.31.24.0/21

CIDRIPsOrganizationASNCountry
187.31.24.0/22 1.0K Oi S.A. - Em Recuperacao Judicial AS14571 BR
187.31.24.0/22 1.0K Sinfony6, LLC AS29987 BR
187.31.28.0/23 512 Oi S.A. - Em Recuperacao Judicial AS14571 BR
187.31.28.0/23 512 Sinfony6, LLC AS29987 BR
187.31.30.0/24 256 Oi S.A. - Em Recuperacao Judicial AS14571 US
187.31.30.0/24 256 Oi S.A. - Em Recuperacao Judicial AS14571 BR
187.31.31.0/24 256 Oi S.A. - Em Recuperacao Judicial AS14571 BR
187.31.31.0/24 256 Sinfony6, LLC AS29987 BR

Geolocation

First 256 of 2,048 IP addresses in 187.31.24.0/21

187.31.24.0 187.31.24.1 187.31.24.2 187.31.24.3 187.31.24.4 187.31.24.5 187.31.24.6 187.31.24.7 187.31.24.8 187.31.24.9 187.31.24.10 187.31.24.11 187.31.24.12 187.31.24.13 187.31.24.14 187.31.24.15 187.31.24.16 187.31.24.17 187.31.24.18 187.31.24.19 187.31.24.20 187.31.24.21 187.31.24.22 187.31.24.23 187.31.24.24 187.31.24.25 187.31.24.26 187.31.24.27 187.31.24.28 187.31.24.29 187.31.24.30 187.31.24.31 187.31.24.32 187.31.24.33 187.31.24.34 187.31.24.35 187.31.24.36 187.31.24.37 187.31.24.38 187.31.24.39 187.31.24.40 187.31.24.41 187.31.24.42 187.31.24.43 187.31.24.44 187.31.24.45 187.31.24.46 187.31.24.47 187.31.24.48 187.31.24.49 187.31.24.50 187.31.24.51 187.31.24.52 187.31.24.53 187.31.24.54 187.31.24.55 187.31.24.56 187.31.24.57 187.31.24.58 187.31.24.59 187.31.24.60 187.31.24.61 187.31.24.62 187.31.24.63 187.31.24.64 187.31.24.65 187.31.24.66 187.31.24.67 187.31.24.68 187.31.24.69 187.31.24.70 187.31.24.71 187.31.24.72 187.31.24.73 187.31.24.74 187.31.24.75 187.31.24.76 187.31.24.77 187.31.24.78 187.31.24.79 187.31.24.80 187.31.24.81 187.31.24.82 187.31.24.83 187.31.24.84 187.31.24.85 187.31.24.86 187.31.24.87 187.31.24.88 187.31.24.89 187.31.24.90 187.31.24.91 187.31.24.92 187.31.24.93 187.31.24.94 187.31.24.95 187.31.24.96 187.31.24.97 187.31.24.98 187.31.24.99 187.31.24.100 187.31.24.101 187.31.24.102 187.31.24.103 187.31.24.104 187.31.24.105 187.31.24.106 187.31.24.107 187.31.24.108 187.31.24.109 187.31.24.110 187.31.24.111 187.31.24.112 187.31.24.113 187.31.24.114 187.31.24.115 187.31.24.116 187.31.24.117 187.31.24.118 187.31.24.119 187.31.24.120 187.31.24.121 187.31.24.122 187.31.24.123 187.31.24.124 187.31.24.125 187.31.24.126 187.31.24.127 187.31.24.128 187.31.24.129 187.31.24.130 187.31.24.131 187.31.24.132 187.31.24.133 187.31.24.134 187.31.24.135 187.31.24.136 187.31.24.137 187.31.24.138 187.31.24.139 187.31.24.140 187.31.24.141 187.31.24.142 187.31.24.143 187.31.24.144 187.31.24.145 187.31.24.146 187.31.24.147 187.31.24.148 187.31.24.149 187.31.24.150 187.31.24.151 187.31.24.152 187.31.24.153 187.31.24.154 187.31.24.155 187.31.24.156 187.31.24.157 187.31.24.158 187.31.24.159 187.31.24.160 187.31.24.161 187.31.24.162 187.31.24.163 187.31.24.164 187.31.24.165 187.31.24.166 187.31.24.167 187.31.24.168 187.31.24.169 187.31.24.170 187.31.24.171 187.31.24.172 187.31.24.173 187.31.24.174 187.31.24.175 187.31.24.176 187.31.24.177 187.31.24.178 187.31.24.179 187.31.24.180 187.31.24.181 187.31.24.182 187.31.24.183 187.31.24.184 187.31.24.185 187.31.24.186 187.31.24.187 187.31.24.188 187.31.24.189 187.31.24.190 187.31.24.191 187.31.24.192 187.31.24.193 187.31.24.194 187.31.24.195 187.31.24.196 187.31.24.197 187.31.24.198 187.31.24.199 187.31.24.200 187.31.24.201 187.31.24.202 187.31.24.203 187.31.24.204 187.31.24.205 187.31.24.206 187.31.24.207 187.31.24.208 187.31.24.209 187.31.24.210 187.31.24.211 187.31.24.212 187.31.24.213 187.31.24.214 187.31.24.215 187.31.24.216 187.31.24.217 187.31.24.218 187.31.24.219 187.31.24.220 187.31.24.221 187.31.24.222 187.31.24.223 187.31.24.224 187.31.24.225 187.31.24.226 187.31.24.227 187.31.24.228 187.31.24.229 187.31.24.230 187.31.24.231 187.31.24.232 187.31.24.233 187.31.24.234 187.31.24.235 187.31.24.236 187.31.24.237 187.31.24.238 187.31.24.239 187.31.24.240 187.31.24.241 187.31.24.242 187.31.24.243 187.31.24.244 187.31.24.245 187.31.24.246 187.31.24.247 187.31.24.248 187.31.24.249 187.31.24.250 187.31.24.251 187.31.24.252 187.31.24.253 187.31.24.254 187.31.24.255 + 1.8K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 187.31.0.0/16.

Announced prefix
187.31.0.0/16
Origin AS
AS14571
⚠ 2 origins (MOAS)
Announcement samples
17,252
Last seen
2026-07-26 07:04:07
Origins seen: AS14571 · 17,252 AS29987 · 10,585

RIR Ownership History

Atom feed ⇲

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

Date Event From To
2026-07-18 New Allocation — BR

Frequently Asked Questions

What is 187.31.24.0/21?

187.31.24.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 187.31.24.0 to 187.31.31.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 187.31.24.0/21 network?

The 187.31.24.0/21 range is allocated to Oi S.A. - Em Recuperacao Judicial and announced via AS14571 from Brazil.

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