57.131.200.0/21 CIDR Lookup — 2.0K IPs Owned…

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.

76/100

Moderate

How this score is built

Baseline (neutral) 65
Long-established allocation (33y) +6
Has a reverse-DNS (PTR) record +5
Trust score 76 / 100

Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 57.131.200.0/21

CIDR	IPs	Organization	ASN	Country
57.131.204.0/22	1.0K	OVH SAS	AS16276	FR
57.131.200.0/23	512	OVH SAS	AS16276	PL
57.131.202.0/24	256	OVH SAS	AS16276	PL
57.131.203.0/24	256	OVH SAS	AS16276	FR

Geolocation

First 256 of 2,048 IP addresses in 57.131.200.0/21

57.131.200.0 57.131.200.1 57.131.200.2 57.131.200.3 57.131.200.4 57.131.200.5 57.131.200.6 57.131.200.7 57.131.200.8 57.131.200.9 57.131.200.10 57.131.200.11 57.131.200.12 57.131.200.13 57.131.200.14 57.131.200.15 57.131.200.16 57.131.200.17 57.131.200.18 57.131.200.19 57.131.200.20 57.131.200.21 57.131.200.22 57.131.200.23 57.131.200.24 57.131.200.25 57.131.200.26 57.131.200.27 57.131.200.28 57.131.200.29 57.131.200.30 57.131.200.31 57.131.200.32 57.131.200.33 57.131.200.34 57.131.200.35 57.131.200.36 57.131.200.37 57.131.200.38 57.131.200.39 57.131.200.40 57.131.200.41 57.131.200.42 57.131.200.43 57.131.200.44 57.131.200.45 57.131.200.46 57.131.200.47 57.131.200.48 57.131.200.49 57.131.200.50 57.131.200.51 57.131.200.52 57.131.200.53 57.131.200.54 57.131.200.55 57.131.200.56 57.131.200.57 57.131.200.58 57.131.200.59 57.131.200.60 57.131.200.61 57.131.200.62 57.131.200.63 57.131.200.64 57.131.200.65 57.131.200.66 57.131.200.67 57.131.200.68 57.131.200.69 57.131.200.70 57.131.200.71 57.131.200.72 57.131.200.73 57.131.200.74 57.131.200.75 57.131.200.76 57.131.200.77 57.131.200.78 57.131.200.79 57.131.200.80 57.131.200.81 57.131.200.82 57.131.200.83 57.131.200.84 57.131.200.85 57.131.200.86 57.131.200.87 57.131.200.88 57.131.200.89 57.131.200.90 57.131.200.91 57.131.200.92 57.131.200.93 57.131.200.94 57.131.200.95 57.131.200.96 57.131.200.97 57.131.200.98 57.131.200.99 57.131.200.100 57.131.200.101 57.131.200.102 57.131.200.103 57.131.200.104 57.131.200.105 57.131.200.106 57.131.200.107 57.131.200.108 57.131.200.109 57.131.200.110 57.131.200.111 57.131.200.112 57.131.200.113 57.131.200.114 57.131.200.115 57.131.200.116 57.131.200.117 57.131.200.118 57.131.200.119 57.131.200.120 57.131.200.121 57.131.200.122 57.131.200.123 57.131.200.124 57.131.200.125 57.131.200.126 57.131.200.127 57.131.200.128 57.131.200.129 57.131.200.130 57.131.200.131 57.131.200.132 57.131.200.133 57.131.200.134 57.131.200.135 57.131.200.136 57.131.200.137 57.131.200.138 57.131.200.139 57.131.200.140 57.131.200.141 57.131.200.142 57.131.200.143 57.131.200.144 57.131.200.145 57.131.200.146 57.131.200.147 57.131.200.148 57.131.200.149 57.131.200.150 57.131.200.151 57.131.200.152 57.131.200.153 57.131.200.154 57.131.200.155 57.131.200.156 57.131.200.157 57.131.200.158 57.131.200.159 57.131.200.160 57.131.200.161 57.131.200.162 57.131.200.163 57.131.200.164 57.131.200.165 57.131.200.166 57.131.200.167 57.131.200.168 57.131.200.169 57.131.200.170 57.131.200.171 57.131.200.172 57.131.200.173 57.131.200.174 57.131.200.175 57.131.200.176 57.131.200.177 57.131.200.178 57.131.200.179 57.131.200.180 57.131.200.181 57.131.200.182 57.131.200.183 57.131.200.184 57.131.200.185 57.131.200.186 57.131.200.187 57.131.200.188 57.131.200.189 57.131.200.190 57.131.200.191 57.131.200.192 57.131.200.193 57.131.200.194 57.131.200.195 57.131.200.196 57.131.200.197 57.131.200.198 57.131.200.199 57.131.200.200 57.131.200.201 57.131.200.202 57.131.200.203 57.131.200.204 57.131.200.205 57.131.200.206 57.131.200.207 57.131.200.208 57.131.200.209 57.131.200.210 57.131.200.211 57.131.200.212 57.131.200.213 57.131.200.214 57.131.200.215 57.131.200.216 57.131.200.217 57.131.200.218 57.131.200.219 57.131.200.220 57.131.200.221 57.131.200.222 57.131.200.223 57.131.200.224 57.131.200.225 57.131.200.226 57.131.200.227 57.131.200.228 57.131.200.229 57.131.200.230 57.131.200.231 57.131.200.232 57.131.200.233 57.131.200.234 57.131.200.235 57.131.200.236 57.131.200.237 57.131.200.238 57.131.200.239 57.131.200.240 57.131.200.241 57.131.200.242 57.131.200.243 57.131.200.244 57.131.200.245 57.131.200.246 57.131.200.247 57.131.200.248 57.131.200.249 57.131.200.250 57.131.200.251 57.131.200.252 57.131.200.253 57.131.200.254 57.131.200.255 + 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 57.131.192.0/18.

Announced prefix

57.131.192.0/18

Origin AS

AS16276

Announcement samples

45,855

Last seen

2026-10-15 04:24:38

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date	Event	From	To	RIR
2026-05-10	New Allocation	—	FR	ripe

Frequently Asked Questions

What is 57.131.200.0/21?

57.131.200.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 57.131.200.0 to 57.131.207.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 57.131.200.0/21 network?

The 57.131.200.0/21 range is allocated to OVH SAS and announced via AS16276 from France.