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CIDR Range

201.91.0.0/18

16.4K IPs /18 TELEFONICA BRASIL S.A AS10429 Brazil LACNIC
Addresses
16,384
16.4K
IP Range
201.91.0.0
→ 201.91.63.255
Sub-ranges
5+
within this block
PTR Density
92.7%
15.2K of 16.4K 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.

64/100
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 201.91.0.0/18

CIDRIPsOrganizationASNCountry
201.91.32.0/19 8.2K TELEFONICA BRASIL S.A AS10429 BR
201.91.0.0/20 4.1K TELEFONICA BRASIL S.A AS10429 BR
201.91.16.0/20 4.1K TELEFONICA BRASIL S.A AS10429 BR
201.91.32.0/20 4.1K TELEFONICA BRASIL S.A AS10429 BR
201.91.48.0/20 4.1K TELEFONICA BRASIL S.A AS10429 BR

Geolocation

First 256 of 16,384 IP addresses in 201.91.0.0/18

201.91.0.0 201.91.0.1 201.91.0.2 201.91.0.3 201.91.0.4 201.91.0.5 201.91.0.6 201.91.0.7 201.91.0.8 201.91.0.9 201.91.0.10 201.91.0.11 201.91.0.12 201.91.0.13 201.91.0.14 201.91.0.15 201.91.0.16 201.91.0.17 201.91.0.18 201.91.0.19 201.91.0.20 201.91.0.21 201.91.0.22 201.91.0.23 201.91.0.24 201.91.0.25 201.91.0.26 201.91.0.27 201.91.0.28 201.91.0.29 201.91.0.30 201.91.0.31 201.91.0.32 201.91.0.33 201.91.0.34 201.91.0.35 201.91.0.36 201.91.0.37 201.91.0.38 201.91.0.39 201.91.0.40 201.91.0.41 201.91.0.42 201.91.0.43 201.91.0.44 201.91.0.45 201.91.0.46 201.91.0.47 201.91.0.48 201.91.0.49 201.91.0.50 201.91.0.51 201.91.0.52 201.91.0.53 201.91.0.54 201.91.0.55 201.91.0.56 201.91.0.57 201.91.0.58 201.91.0.59 201.91.0.60 201.91.0.61 201.91.0.62 201.91.0.63 201.91.0.64 201.91.0.65 201.91.0.66 201.91.0.67 201.91.0.68 201.91.0.69 201.91.0.70 201.91.0.71 201.91.0.72 201.91.0.73 201.91.0.74 201.91.0.75 201.91.0.76 201.91.0.77 201.91.0.78 201.91.0.79 201.91.0.80 201.91.0.81 201.91.0.82 201.91.0.83 201.91.0.84 201.91.0.85 201.91.0.86 201.91.0.87 201.91.0.88 201.91.0.89 201.91.0.90 201.91.0.91 201.91.0.92 201.91.0.93 201.91.0.94 201.91.0.95 201.91.0.96 201.91.0.97 201.91.0.98 201.91.0.99 201.91.0.100 201.91.0.101 201.91.0.102 201.91.0.103 201.91.0.104 201.91.0.105 201.91.0.106 201.91.0.107 201.91.0.108 201.91.0.109 201.91.0.110 201.91.0.111 201.91.0.112 201.91.0.113 201.91.0.114 201.91.0.115 201.91.0.116 201.91.0.117 201.91.0.118 201.91.0.119 201.91.0.120 201.91.0.121 201.91.0.122 201.91.0.123 201.91.0.124 201.91.0.125 201.91.0.126 201.91.0.127 201.91.0.128 201.91.0.129 201.91.0.130 201.91.0.131 201.91.0.132 201.91.0.133 201.91.0.134 201.91.0.135 201.91.0.136 201.91.0.137 201.91.0.138 201.91.0.139 201.91.0.140 201.91.0.141 201.91.0.142 201.91.0.143 201.91.0.144 201.91.0.145 201.91.0.146 201.91.0.147 201.91.0.148 201.91.0.149 201.91.0.150 201.91.0.151 201.91.0.152 201.91.0.153 201.91.0.154 201.91.0.155 201.91.0.156 201.91.0.157 201.91.0.158 201.91.0.159 201.91.0.160 201.91.0.161 201.91.0.162 201.91.0.163 201.91.0.164 201.91.0.165 201.91.0.166 201.91.0.167 201.91.0.168 201.91.0.169 201.91.0.170 201.91.0.171 201.91.0.172 201.91.0.173 201.91.0.174 201.91.0.175 201.91.0.176 201.91.0.177 201.91.0.178 201.91.0.179 201.91.0.180 201.91.0.181 201.91.0.182 201.91.0.183 201.91.0.184 201.91.0.185 201.91.0.186 201.91.0.187 201.91.0.188 201.91.0.189 201.91.0.190 201.91.0.191 201.91.0.192 201.91.0.193 201.91.0.194 201.91.0.195 201.91.0.196 201.91.0.197 201.91.0.198 201.91.0.199 201.91.0.200 201.91.0.201 201.91.0.202 201.91.0.203 201.91.0.204 201.91.0.205 201.91.0.206 201.91.0.207 201.91.0.208 201.91.0.209 201.91.0.210 201.91.0.211 201.91.0.212 201.91.0.213 201.91.0.214 201.91.0.215 201.91.0.216 201.91.0.217 201.91.0.218 201.91.0.219 201.91.0.220 201.91.0.221 201.91.0.222 201.91.0.223 201.91.0.224 201.91.0.225 201.91.0.226 201.91.0.227 201.91.0.228 201.91.0.229 201.91.0.230 201.91.0.231 201.91.0.232 201.91.0.233 201.91.0.234 201.91.0.235 201.91.0.236 201.91.0.237 201.91.0.238 201.91.0.239 201.91.0.240 201.91.0.241 201.91.0.242 201.91.0.243 201.91.0.244 201.91.0.245 201.91.0.246 201.91.0.247 201.91.0.248 201.91.0.249 201.91.0.250 201.91.0.251 201.91.0.252 201.91.0.253 201.91.0.254 201.91.0.255 + 16.1K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 201.91.0.0/16.

Announced prefix
201.91.0.0/16
Origin AS
AS10429
⚠ 2 origins (MOAS)
Announcement samples
4,068
Last seen
2026-07-24 09:32:55
Origins seen: AS10429 · 4,068 AS18881 · 29

Frequently Asked Questions

What is 201.91.0.0/18?

201.91.0.0/18 is a CIDR network block containing 16,384 IPv4 addresses (from 201.91.0.0 to 201.91.63.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 201.91.0.0/18 network?

The 201.91.0.0/18 range is allocated to TELEFONICA BRASIL S.A and announced via AS10429 from Brazil.

Last updated: 2026-07-24 09:40:31 UTC
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