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CIDR Range

38.126.136.0/21

2.0K IPs /21 United States ARIN
Addresses
2,048
2.0K
IP Range
38.126.136.0
→ 38.126.143.255
Sub-ranges
26+
within this block
PTR Density
2.7%
56 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.

76/100
Moderate
How this score is built

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

Ranges inside 38.126.136.0/21

CIDRIPsOrganizationASNCountry
38.126.140.0/22 1.0K Cogent Communications, LLC AS174 US
38.126.140.0/22 1.0K Cogent Communications, LLC AS174 US
38.126.140.0/23 512 — — US
38.126.136.0/23 512 Cogent Communications, LLC AS174 US
38.126.136.0/23 512 Cogent Communications, LLC AS174 US
38.126.136.0/24 256 — — US
38.126.139.0/24 256 — — US
38.126.139.0/24 256 Balyasny Asset Management L.P. AS27399 US
38.126.139.0/24 256 Balyasny Asset Management L.P. AS27399 US
38.126.143.0/24 256 — — US
38.126.138.0/24 256 TRILLIUM TRADING LLC AS16754 US
38.126.138.0/24 256 Cogent Communications, LLC AS174 US
38.126.137.0/24 256 — — US
38.126.138.0/25 128 — — US
38.126.142.128/26 64 — — US
38.126.138.192/26 64 — — US
38.126.142.0/26 64 — — US
38.126.138.128/27 32 — — US
38.126.142.96/27 32 — — US
38.126.138.160/27 32 — — US
38.126.142.192/27 32 — — US
38.126.142.80/28 16 — — US
38.126.142.240/28 16 — — US
38.126.142.64/28 16 — — US
38.126.142.224/29 8 — — US
38.126.142.232/29 8 — — US

First 256 of 2,048 IP addresses in 38.126.136.0/21

38.126.136.0 38.126.136.1 38.126.136.2 38.126.136.3 38.126.136.4 38.126.136.5 38.126.136.6 38.126.136.7 38.126.136.8 38.126.136.9 38.126.136.10 38.126.136.11 38.126.136.12 38.126.136.13 38.126.136.14 38.126.136.15 38.126.136.16 38.126.136.17 38.126.136.18 38.126.136.19 38.126.136.20 38.126.136.21 38.126.136.22 38.126.136.23 38.126.136.24 38.126.136.25 38.126.136.26 38.126.136.27 38.126.136.28 38.126.136.29 38.126.136.30 38.126.136.31 38.126.136.32 38.126.136.33 38.126.136.34 38.126.136.35 38.126.136.36 38.126.136.37 38.126.136.38 38.126.136.39 38.126.136.40 38.126.136.41 38.126.136.42 38.126.136.43 38.126.136.44 38.126.136.45 38.126.136.46 38.126.136.47 38.126.136.48 38.126.136.49 38.126.136.50 38.126.136.51 38.126.136.52 38.126.136.53 38.126.136.54 38.126.136.55 38.126.136.56 38.126.136.57 38.126.136.58 38.126.136.59 38.126.136.60 38.126.136.61 38.126.136.62 38.126.136.63 38.126.136.64 38.126.136.65 38.126.136.66 38.126.136.67 38.126.136.68 38.126.136.69 38.126.136.70 38.126.136.71 38.126.136.72 38.126.136.73 38.126.136.74 38.126.136.75 38.126.136.76 38.126.136.77 38.126.136.78 38.126.136.79 38.126.136.80 38.126.136.81 38.126.136.82 38.126.136.83 38.126.136.84 38.126.136.85 38.126.136.86 38.126.136.87 38.126.136.88 38.126.136.89 38.126.136.90 38.126.136.91 38.126.136.92 38.126.136.93 38.126.136.94 38.126.136.95 38.126.136.96 38.126.136.97 38.126.136.98 38.126.136.99 38.126.136.100 38.126.136.101 38.126.136.102 38.126.136.103 38.126.136.104 38.126.136.105 38.126.136.106 38.126.136.107 38.126.136.108 38.126.136.109 38.126.136.110 38.126.136.111 38.126.136.112 38.126.136.113 38.126.136.114 38.126.136.115 38.126.136.116 38.126.136.117 38.126.136.118 38.126.136.119 38.126.136.120 38.126.136.121 38.126.136.122 38.126.136.123 38.126.136.124 38.126.136.125 38.126.136.126 38.126.136.127 38.126.136.128 38.126.136.129 38.126.136.130 38.126.136.131 38.126.136.132 38.126.136.133 38.126.136.134 38.126.136.135 38.126.136.136 38.126.136.137 38.126.136.138 38.126.136.139 38.126.136.140 38.126.136.141 38.126.136.142 38.126.136.143 38.126.136.144 38.126.136.145 38.126.136.146 38.126.136.147 38.126.136.148 38.126.136.149 38.126.136.150 38.126.136.151 38.126.136.152 38.126.136.153 38.126.136.154 38.126.136.155 38.126.136.156 38.126.136.157 38.126.136.158 38.126.136.159 38.126.136.160 38.126.136.161 38.126.136.162 38.126.136.163 38.126.136.164 38.126.136.165 38.126.136.166 38.126.136.167 38.126.136.168 38.126.136.169 38.126.136.170 38.126.136.171 38.126.136.172 38.126.136.173 38.126.136.174 38.126.136.175 38.126.136.176 38.126.136.177 38.126.136.178 38.126.136.179 38.126.136.180 38.126.136.181 38.126.136.182 38.126.136.183 38.126.136.184 38.126.136.185 38.126.136.186 38.126.136.187 38.126.136.188 38.126.136.189 38.126.136.190 38.126.136.191 38.126.136.192 38.126.136.193 38.126.136.194 38.126.136.195 38.126.136.196 38.126.136.197 38.126.136.198 38.126.136.199 38.126.136.200 38.126.136.201 38.126.136.202 38.126.136.203 38.126.136.204 38.126.136.205 38.126.136.206 38.126.136.207 38.126.136.208 38.126.136.209 38.126.136.210 38.126.136.211 38.126.136.212 38.126.136.213 38.126.136.214 38.126.136.215 38.126.136.216 38.126.136.217 38.126.136.218 38.126.136.219 38.126.136.220 38.126.136.221 38.126.136.222 38.126.136.223 38.126.136.224 38.126.136.225 38.126.136.226 38.126.136.227 38.126.136.228 38.126.136.229 38.126.136.230 38.126.136.231 38.126.136.232 38.126.136.233 38.126.136.234 38.126.136.235 38.126.136.236 38.126.136.237 38.126.136.238 38.126.136.239 38.126.136.240 38.126.136.241 38.126.136.242 38.126.136.243 38.126.136.244 38.126.136.245 38.126.136.246 38.126.136.247 38.126.136.248 38.126.136.249 38.126.136.250 38.126.136.251 38.126.136.252 38.126.136.253 38.126.136.254 38.126.136.255 + 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 38.0.0.0/8.

Announced prefix
38.0.0.0/8
Origin AS
AS174
Announcement samples
15,183
Last seen
2026-10-14 07:18:15

RIR Ownership History

Atom feed ⇲

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

Date Event From To
2026-05-10 New Allocation — US

Frequently Asked Questions

What is 38.126.136.0/21?

38.126.136.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 38.126.136.0 to 38.126.143.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 38.126.136.0/21 network?

The 38.126.136.0/21 range is allocated to an unknown organization from United States.

Last updated: 2026-10-14 08:39:05 UTC
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