Tools
Proxy list subnet check
Paste a list and find out whether your proxies sit in the same /24 subnet. If they do, a block of one subnet takes out many addresses at once. No sign-up, in the browser.
Check the list
One per line, in any common format. Only the addresses are used: logins and passwords are ignored.
The check runs in your browser: the list is not sent anywhere or saved.
Paste a list above and the result will appear here.
How to read the result
A /24 subnet is 256 neighboring addresses, for example from 203.0.113.0 to 203.0.113.255.
- Why it matters. Anti-fraud systems often look not at a single address but at the whole subnet: if neighbors are caught abusing, suspicion falls on everyone.
- A cluster is a subnet where your list has three or more addresses. The larger the share of the list in clusters, the higher the risk of losing many proxies at once.
- What we skip. Proxies with a host name (a subnet cannot be found from a name) and IPv6 addresses (not analyzed here).
This measures spread, not cleanliness
A single list cannot reveal a subnet's reputation: the check only shows how close together the addresses are. The thresholds (three addresses in a subnet, a quarter and a half of the list) are our guideline, not a platform rule.
The list stays with you
The check works entirely in your browser: the page does not send the pasted list to a server and does not save it. You can verify this in the Network tab of the developer tools.
What next
Addresses sit close together? Ask in a chat with Hopmind for proxies from different subnets. The calculator tells you how many addresses you need in total.