175.121.128.0/19 CIDR Lookup — 8.2K IPs

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 (17y) +6
Has a reverse-DNS (PTR) record +5
Trust score 76 / 100

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

Ranges inside 175.121.128.0/19

CIDR	IPs	Organization	ASN	Country
175.121.128.0/20	4.1K	—	AS9318	KR
175.121.128.0/20	4.1K	SK Broadband Co Ltd	AS9318	KR
175.121.128.0/20	4.1K	—	—	KR
175.121.152.0/21	2.0K	—	—	KR
175.121.152.0/21	2.0K	SK Broadband Co Ltd	AS9318	KR
175.121.144.0/21	2.0K	—	—	KR
175.121.152.0/21	2.0K	—	AS9318	KR
175.121.152.0/22	1.0K	—	—	KR
175.121.156.0/22	1.0K	—	—	KR
175.121.144.0/22	1.0K	—	AS9318	KR
175.121.144.0/22	1.0K	SK Broadband Co Ltd	AS9318	KR
175.121.149.0/24	256	—	AS38410	KR
175.121.148.0/24	256	—	AS38398	KR
175.121.148.0/24	256	Gyeonggi Uijeongbu office of Education	AS38398	KR
175.121.151.0/24	256	Dongducheonyangju office of Education	AS38409	KR
175.121.151.0/24	256	—	AS38409	KR
175.121.150.0/24	256	SK Broadband Co Ltd	AS9318	KR
175.121.150.0/24	256	—	AS9318	KR
175.121.149.0/24	256	Pocheon Office of Education	AS38410	KR

Geolocation

First 256 of 8,192 IP addresses in 175.121.128.0/19

175.121.128.0 175.121.128.1 175.121.128.2 175.121.128.3 175.121.128.4 175.121.128.5 175.121.128.6 175.121.128.7 175.121.128.8 175.121.128.9 175.121.128.10 175.121.128.11 175.121.128.12 175.121.128.13 175.121.128.14 175.121.128.15 175.121.128.16 175.121.128.17 175.121.128.18 175.121.128.19 175.121.128.20 175.121.128.21 175.121.128.22 175.121.128.23 175.121.128.24 175.121.128.25 175.121.128.26 175.121.128.27 175.121.128.28 175.121.128.29 175.121.128.30 175.121.128.31 175.121.128.32 175.121.128.33 175.121.128.34 175.121.128.35 175.121.128.36 175.121.128.37 175.121.128.38 175.121.128.39 175.121.128.40 175.121.128.41 175.121.128.42 175.121.128.43 175.121.128.44 175.121.128.45 175.121.128.46 175.121.128.47 175.121.128.48 175.121.128.49 175.121.128.50 175.121.128.51 175.121.128.52 175.121.128.53 175.121.128.54 175.121.128.55 175.121.128.56 175.121.128.57 175.121.128.58 175.121.128.59 175.121.128.60 175.121.128.61 175.121.128.62 175.121.128.63 175.121.128.64 175.121.128.65 175.121.128.66 175.121.128.67 175.121.128.68 175.121.128.69 175.121.128.70 175.121.128.71 175.121.128.72 175.121.128.73 175.121.128.74 175.121.128.75 175.121.128.76 175.121.128.77 175.121.128.78 175.121.128.79 175.121.128.80 175.121.128.81 175.121.128.82 175.121.128.83 175.121.128.84 175.121.128.85 175.121.128.86 175.121.128.87 175.121.128.88 175.121.128.89 175.121.128.90 175.121.128.91 175.121.128.92 175.121.128.93 175.121.128.94 175.121.128.95 175.121.128.96 175.121.128.97 175.121.128.98 175.121.128.99 175.121.128.100 175.121.128.101 175.121.128.102 175.121.128.103 175.121.128.104 175.121.128.105 175.121.128.106 175.121.128.107 175.121.128.108 175.121.128.109 175.121.128.110 175.121.128.111 175.121.128.112 175.121.128.113 175.121.128.114 175.121.128.115 175.121.128.116 175.121.128.117 175.121.128.118 175.121.128.119 175.121.128.120 175.121.128.121 175.121.128.122 175.121.128.123 175.121.128.124 175.121.128.125 175.121.128.126 175.121.128.127 175.121.128.128 175.121.128.129 175.121.128.130 175.121.128.131 175.121.128.132 175.121.128.133 175.121.128.134 175.121.128.135 175.121.128.136 175.121.128.137 175.121.128.138 175.121.128.139 175.121.128.140 175.121.128.141 175.121.128.142 175.121.128.143 175.121.128.144 175.121.128.145 175.121.128.146 175.121.128.147 175.121.128.148 175.121.128.149 175.121.128.150 175.121.128.151 175.121.128.152 175.121.128.153 175.121.128.154 175.121.128.155 175.121.128.156 175.121.128.157 175.121.128.158 175.121.128.159 175.121.128.160 175.121.128.161 175.121.128.162 175.121.128.163 175.121.128.164 175.121.128.165 175.121.128.166 175.121.128.167 175.121.128.168 175.121.128.169 175.121.128.170 175.121.128.171 175.121.128.172 175.121.128.173 175.121.128.174 175.121.128.175 175.121.128.176 175.121.128.177 175.121.128.178 175.121.128.179 175.121.128.180 175.121.128.181 175.121.128.182 175.121.128.183 175.121.128.184 175.121.128.185 175.121.128.186 175.121.128.187 175.121.128.188 175.121.128.189 175.121.128.190 175.121.128.191 175.121.128.192 175.121.128.193 175.121.128.194 175.121.128.195 175.121.128.196 175.121.128.197 175.121.128.198 175.121.128.199 175.121.128.200 175.121.128.201 175.121.128.202 175.121.128.203 175.121.128.204 175.121.128.205 175.121.128.206 175.121.128.207 175.121.128.208 175.121.128.209 175.121.128.210 175.121.128.211 175.121.128.212 175.121.128.213 175.121.128.214 175.121.128.215 175.121.128.216 175.121.128.217 175.121.128.218 175.121.128.219 175.121.128.220 175.121.128.221 175.121.128.222 175.121.128.223 175.121.128.224 175.121.128.225 175.121.128.226 175.121.128.227 175.121.128.228 175.121.128.229 175.121.128.230 175.121.128.231 175.121.128.232 175.121.128.233 175.121.128.234 175.121.128.235 175.121.128.236 175.121.128.237 175.121.128.238 175.121.128.239 175.121.128.240 175.121.128.241 175.121.128.242 175.121.128.243 175.121.128.244 175.121.128.245 175.121.128.246 175.121.128.247 175.121.128.248 175.121.128.249 175.121.128.250 175.121.128.251 175.121.128.252 175.121.128.253 175.121.128.254 175.121.128.255 + 7.9K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 175.112.0.0/12.

Announced prefix

175.112.0.0/12

Origin AS

AS9318

Announcement samples

5,209

Last seen

2026-07-19 12:45:18

Frequently Asked Questions

What is 175.121.128.0/19?

175.121.128.0/19 is a CIDR network block containing 8,192 IPv4 addresses (from 175.121.128.0 to 175.121.159.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 175.121.128.0/19 network?

The 175.121.128.0/19 range is allocated to an unknown organization from South Korea.