3.5.81.0/24 subnet

IPv4 /24 block

3.5.81.0/24 is a block of 256 IPv4 addresses announced by AS16509 (Amazon Data Services Northern Virginia), located mainly in United States. IPDebrief has analysed 24 addresses in this block; none currently carries a higher risk score. Overall the neighbourhood is assessed as mostly clean.

Updated 2 November 2026

Analysed: 24
Higher risk: 0
Hosting / datacenter: 1
VPN, proxy or Tor: 0
With reverse DNS: 13

Analysed addresses in 3.5.81.0/24

0 higher risk0 moderate24 low

3.5.81.7risk 25
3.5.81.9risk 25
3.5.81.32s3.us-west-2.amazonaws.com · risk 0
3.5.81.35s3-fips-r-w.us-west-2.amazonaws.com · risk 25
3.5.81.41risk 25
3.5.81.43risk 25
3.5.81.50risk 25
3.5.81.60risk 25
3.5.81.62risk 25
3.5.81.193s3-deprecated.us-west-2.amazonaws.com · risk 25
3.5.81.199s3-fips-r-w.us-west-2.amazonaws.com · risk 25
3.5.81.201s3-us-west-2-r-w.amazonaws.com · risk 25
3.5.81.206s3.us-west-2.amazonaws.com · risk 25
3.5.81.219s3-r-w.us-west-2.amazonaws.com · risk 25
3.5.81.222risk 20
3.5.81.223s3-us-west-2-r-w.amazonaws.com · risk 25
3.5.81.224s3-r-w.us-west-2.amazonaws.com · risk 25
3.5.81.227risk 25
3.5.81.228s3-us-west-2-r-w.amazonaws.com · risk 25
3.5.81.238s3-website.us-west-2.amazonaws.com · risk 25
3.5.81.242risk 25
3.5.81.246s3-r-w.us-west-2.amazonaws.com · risk 25
3.5.81.249s3-fips-r-w.us-west-2.amazonaws.com · risk 20
3.5.81.254risk 25

Related networks

About this block

A /24 is the smallest IPv4 block normally routed on the internet, so the 256 addresses inside it usually share one operator and purpose. Looking at a whole block shows whether a single suspicious address is an outlier or part of a pattern: a block where many addresses carry abuse reports, hosting infrastructure or anonymising services deserves more caution than one with a single flagged address.

Only addresses IPDebrief has analysed are listed. Each links to its full profile with ownership, routing, reverse DNS and risk evidence.