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CIDR Range

157.98.128.0/19

8.2K IPs /19 National Institutes of Health AS3527 United States ARIN
Addresses
8,192
8.2K
IP Range
157.98.128.0
→ 157.98.159.255
Sub-ranges
4+
within this block
PTR Density
0.1%
6 of 8.2K 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 157.98.128.0/19

CIDRIPsOrganizationASNCountry
157.98.128.0/20 4.1K National Institutes of Health AS3527 US
157.98.144.0/20 4.1K National Institutes of Health AS3527 US
157.98.144.0/21 2.0K National Institutes of Health AS3527 US
157.98.152.0/21 2.0K National Institutes of Health AS3527 US

Geolocation

First 256 of 8,192 IP addresses in 157.98.128.0/19

157.98.128.0 157.98.128.1 157.98.128.2 157.98.128.3 157.98.128.4 157.98.128.5 157.98.128.6 157.98.128.7 157.98.128.8 157.98.128.9 157.98.128.10 157.98.128.11 157.98.128.12 157.98.128.13 157.98.128.14 157.98.128.15 157.98.128.16 157.98.128.17 157.98.128.18 157.98.128.19 157.98.128.20 157.98.128.21 157.98.128.22 157.98.128.23 157.98.128.24 157.98.128.25 157.98.128.26 157.98.128.27 157.98.128.28 157.98.128.29 157.98.128.30 157.98.128.31 157.98.128.32 157.98.128.33 157.98.128.34 157.98.128.35 157.98.128.36 157.98.128.37 157.98.128.38 157.98.128.39 157.98.128.40 157.98.128.41 157.98.128.42 157.98.128.43 157.98.128.44 157.98.128.45 157.98.128.46 157.98.128.47 157.98.128.48 157.98.128.49 157.98.128.50 157.98.128.51 157.98.128.52 157.98.128.53 157.98.128.54 157.98.128.55 157.98.128.56 157.98.128.57 157.98.128.58 157.98.128.59 157.98.128.60 157.98.128.61 157.98.128.62 157.98.128.63 157.98.128.64 157.98.128.65 157.98.128.66 157.98.128.67 157.98.128.68 157.98.128.69 157.98.128.70 157.98.128.71 157.98.128.72 157.98.128.73 157.98.128.74 157.98.128.75 157.98.128.76 157.98.128.77 157.98.128.78 157.98.128.79 157.98.128.80 157.98.128.81 157.98.128.82 157.98.128.83 157.98.128.84 157.98.128.85 157.98.128.86 157.98.128.87 157.98.128.88 157.98.128.89 157.98.128.90 157.98.128.91 157.98.128.92 157.98.128.93 157.98.128.94 157.98.128.95 157.98.128.96 157.98.128.97 157.98.128.98 157.98.128.99 157.98.128.100 157.98.128.101 157.98.128.102 157.98.128.103 157.98.128.104 157.98.128.105 157.98.128.106 157.98.128.107 157.98.128.108 157.98.128.109 157.98.128.110 157.98.128.111 157.98.128.112 157.98.128.113 157.98.128.114 157.98.128.115 157.98.128.116 157.98.128.117 157.98.128.118 157.98.128.119 157.98.128.120 157.98.128.121 157.98.128.122 157.98.128.123 157.98.128.124 157.98.128.125 157.98.128.126 157.98.128.127 157.98.128.128 157.98.128.129 157.98.128.130 157.98.128.131 157.98.128.132 157.98.128.133 157.98.128.134 157.98.128.135 157.98.128.136 157.98.128.137 157.98.128.138 157.98.128.139 157.98.128.140 157.98.128.141 157.98.128.142 157.98.128.143 157.98.128.144 157.98.128.145 157.98.128.146 157.98.128.147 157.98.128.148 157.98.128.149 157.98.128.150 157.98.128.151 157.98.128.152 157.98.128.153 157.98.128.154 157.98.128.155 157.98.128.156 157.98.128.157 157.98.128.158 157.98.128.159 157.98.128.160 157.98.128.161 157.98.128.162 157.98.128.163 157.98.128.164 157.98.128.165 157.98.128.166 157.98.128.167 157.98.128.168 157.98.128.169 157.98.128.170 157.98.128.171 157.98.128.172 157.98.128.173 157.98.128.174 157.98.128.175 157.98.128.176 157.98.128.177 157.98.128.178 157.98.128.179 157.98.128.180 157.98.128.181 157.98.128.182 157.98.128.183 157.98.128.184 157.98.128.185 157.98.128.186 157.98.128.187 157.98.128.188 157.98.128.189 157.98.128.190 157.98.128.191 157.98.128.192 157.98.128.193 157.98.128.194 157.98.128.195 157.98.128.196 157.98.128.197 157.98.128.198 157.98.128.199 157.98.128.200 157.98.128.201 157.98.128.202 157.98.128.203 157.98.128.204 157.98.128.205 157.98.128.206 157.98.128.207 157.98.128.208 157.98.128.209 157.98.128.210 157.98.128.211 157.98.128.212 157.98.128.213 157.98.128.214 157.98.128.215 157.98.128.216 157.98.128.217 157.98.128.218 157.98.128.219 157.98.128.220 157.98.128.221 157.98.128.222 157.98.128.223 157.98.128.224 157.98.128.225 157.98.128.226 157.98.128.227 157.98.128.228 157.98.128.229 157.98.128.230 157.98.128.231 157.98.128.232 157.98.128.233 157.98.128.234 157.98.128.235 157.98.128.236 157.98.128.237 157.98.128.238 157.98.128.239 157.98.128.240 157.98.128.241 157.98.128.242 157.98.128.243 157.98.128.244 157.98.128.245 157.98.128.246 157.98.128.247 157.98.128.248 157.98.128.249 157.98.128.250 157.98.128.251 157.98.128.252 157.98.128.253 157.98.128.254 157.98.128.255 + 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 157.98.0.0/16.

Announced prefix
157.98.0.0/16
Origin AS
AS3527
Announcement samples
3,419
Last seen
2026-07-23 15:09:11

Frequently Asked Questions

What is 157.98.128.0/19?

157.98.128.0/19 is a CIDR network block containing 8,192 IPv4 addresses (from 157.98.128.0 to 157.98.159.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 157.98.128.0/19 network?

The 157.98.128.0/19 range is allocated to National Institutes of Health and announced via AS3527 from United States.

Last updated: 2026-07-23 15:25:31 UTC
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