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CIDR Range

146.189.64.0/18

16.4K IPs /18 University of Massachusetts Medical School AS5724 United States ARIN
Addresses
16,384
16.4K
IP Range
146.189.64.0
→ 146.189.127.255
Sub-ranges
5+
within this block
PTR Density
11.5%
1.9K 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.

76/100
Moderate
How this score is built

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 146.189.64.0/18

CIDRIPsOrganizationASNCountry
146.189.96.0/19 8.2K University of Massachusetts Medical School AS5724 US
146.189.64.0/20 4.1K University of Massachusetts Medical School AS5724 US
146.189.80.0/20 4.1K University of Massachusetts Medical School AS5724 US
146.189.96.0/20 4.1K University of Massachusetts Medical School AS5724 US
146.189.112.0/20 4.1K University of Massachusetts Medical School AS5724 US

Geolocation

First 256 of 16,384 IP addresses in 146.189.64.0/18

146.189.64.0 146.189.64.1 146.189.64.2 146.189.64.3 146.189.64.4 146.189.64.5 146.189.64.6 146.189.64.7 146.189.64.8 146.189.64.9 146.189.64.10 146.189.64.11 146.189.64.12 146.189.64.13 146.189.64.14 146.189.64.15 146.189.64.16 146.189.64.17 146.189.64.18 146.189.64.19 146.189.64.20 146.189.64.21 146.189.64.22 146.189.64.23 146.189.64.24 146.189.64.25 146.189.64.26 146.189.64.27 146.189.64.28 146.189.64.29 146.189.64.30 146.189.64.31 146.189.64.32 146.189.64.33 146.189.64.34 146.189.64.35 146.189.64.36 146.189.64.37 146.189.64.38 146.189.64.39 146.189.64.40 146.189.64.41 146.189.64.42 146.189.64.43 146.189.64.44 146.189.64.45 146.189.64.46 146.189.64.47 146.189.64.48 146.189.64.49 146.189.64.50 146.189.64.51 146.189.64.52 146.189.64.53 146.189.64.54 146.189.64.55 146.189.64.56 146.189.64.57 146.189.64.58 146.189.64.59 146.189.64.60 146.189.64.61 146.189.64.62 146.189.64.63 146.189.64.64 146.189.64.65 146.189.64.66 146.189.64.67 146.189.64.68 146.189.64.69 146.189.64.70 146.189.64.71 146.189.64.72 146.189.64.73 146.189.64.74 146.189.64.75 146.189.64.76 146.189.64.77 146.189.64.78 146.189.64.79 146.189.64.80 146.189.64.81 146.189.64.82 146.189.64.83 146.189.64.84 146.189.64.85 146.189.64.86 146.189.64.87 146.189.64.88 146.189.64.89 146.189.64.90 146.189.64.91 146.189.64.92 146.189.64.93 146.189.64.94 146.189.64.95 146.189.64.96 146.189.64.97 146.189.64.98 146.189.64.99 146.189.64.100 146.189.64.101 146.189.64.102 146.189.64.103 146.189.64.104 146.189.64.105 146.189.64.106 146.189.64.107 146.189.64.108 146.189.64.109 146.189.64.110 146.189.64.111 146.189.64.112 146.189.64.113 146.189.64.114 146.189.64.115 146.189.64.116 146.189.64.117 146.189.64.118 146.189.64.119 146.189.64.120 146.189.64.121 146.189.64.122 146.189.64.123 146.189.64.124 146.189.64.125 146.189.64.126 146.189.64.127 146.189.64.128 146.189.64.129 146.189.64.130 146.189.64.131 146.189.64.132 146.189.64.133 146.189.64.134 146.189.64.135 146.189.64.136 146.189.64.137 146.189.64.138 146.189.64.139 146.189.64.140 146.189.64.141 146.189.64.142 146.189.64.143 146.189.64.144 146.189.64.145 146.189.64.146 146.189.64.147 146.189.64.148 146.189.64.149 146.189.64.150 146.189.64.151 146.189.64.152 146.189.64.153 146.189.64.154 146.189.64.155 146.189.64.156 146.189.64.157 146.189.64.158 146.189.64.159 146.189.64.160 146.189.64.161 146.189.64.162 146.189.64.163 146.189.64.164 146.189.64.165 146.189.64.166 146.189.64.167 146.189.64.168 146.189.64.169 146.189.64.170 146.189.64.171 146.189.64.172 146.189.64.173 146.189.64.174 146.189.64.175 146.189.64.176 146.189.64.177 146.189.64.178 146.189.64.179 146.189.64.180 146.189.64.181 146.189.64.182 146.189.64.183 146.189.64.184 146.189.64.185 146.189.64.186 146.189.64.187 146.189.64.188 146.189.64.189 146.189.64.190 146.189.64.191 146.189.64.192 146.189.64.193 146.189.64.194 146.189.64.195 146.189.64.196 146.189.64.197 146.189.64.198 146.189.64.199 146.189.64.200 146.189.64.201 146.189.64.202 146.189.64.203 146.189.64.204 146.189.64.205 146.189.64.206 146.189.64.207 146.189.64.208 146.189.64.209 146.189.64.210 146.189.64.211 146.189.64.212 146.189.64.213 146.189.64.214 146.189.64.215 146.189.64.216 146.189.64.217 146.189.64.218 146.189.64.219 146.189.64.220 146.189.64.221 146.189.64.222 146.189.64.223 146.189.64.224 146.189.64.225 146.189.64.226 146.189.64.227 146.189.64.228 146.189.64.229 146.189.64.230 146.189.64.231 146.189.64.232 146.189.64.233 146.189.64.234 146.189.64.235 146.189.64.236 146.189.64.237 146.189.64.238 146.189.64.239 146.189.64.240 146.189.64.241 146.189.64.242 146.189.64.243 146.189.64.244 146.189.64.245 146.189.64.246 146.189.64.247 146.189.64.248 146.189.64.249 146.189.64.250 146.189.64.251 146.189.64.252 146.189.64.253 146.189.64.254 146.189.64.255 + 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 146.189.0.0/16.

Announced prefix
146.189.0.0/16
Origin AS
AS5724
Announcement samples
4,336
Last seen
2026-07-18 12:01:14

Frequently Asked Questions

What is 146.189.64.0/18?

146.189.64.0/18 is a CIDR network block containing 16,384 IPv4 addresses (from 146.189.64.0 to 146.189.127.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 146.189.64.0/18 network?

The 146.189.64.0/18 range is allocated to University of Massachusetts Medical School and announced via AS5724 from United States.

Last updated: 2026-07-18 12:25:31 UTC
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