How to Test Mobile Proxy IP Rotation

For a sticky-session test, keep the same session identifier and rotation mode across reconnects. For a timed-rotation test, sample before and after the documented interval. Write down the country, pool and mode alongside the results, without saving the password.

Proxies.sx documents sticky and timed modes auto5, auto10, auto20 and auto60. Include a sid when continuity across connections matters. The rotation cookbook explains endpoint selection; the rotation buying guide covers product choices.

An ordinary HTTP request may reuse an existing connection. A script that opens a new connection each time tests a different pattern from a browser holding a CONNECT tunnel open. Keep that difference in your test record.

Download rotation-sampler.py. It uses Python 3 and curl, prompts for credentials and makes one request per sample to an HTTPS endpoint you supply. That endpoint must return a JSON object with an ip field containing one IPv4 or IPv6 address.

Run it against an endpoint you control or have permission to query. The default is six samples, with ten seconds between requests. For a ten-minute mode, choose a longer observation window; a short test cannot establish interval behavior.

Each sample launches a fresh curl process. The sampler uses a 15-second request limit, does not follow redirects and does not call a modem rotation API. It writes timestamps, HTTP status, observed IP and an error category to CSV. Credentials pass through curl’s standard input, not command-line arguments. Keep the resulting IP log private when sharing it would expose your infrastructure.

The download was checked with local fixtures, including repeated addresses and failed requests. We did not use it to measure paid mobile routes for this article. Your run consumes traffic and reveals the exit IP to the endpoint you choose.

Carrier-grade NAT allows subscribers to share public address space. It limits what a list of exit addresses can tell you about the underlying devices; RFC 6598 provides the shared-address-space context. A small sample cannot establish the size of a provider’s entire IP pool.

curl’s remote_ip reports the remote peer for its connection. When curl connects through an explicit proxy, that value can identify the proxy connection rather than the exit address seen by the target. The sampler reads the endpoint’s response body instead. See the curl manual for connection and output fields.

Use the same proxy configuration in the real application after this diagnostic. Compare a short reconnecting run with the application’s normal connection reuse. A successful echo request establishes an observed address for that request; it does not establish login continuity or acceptance by another destination.

Save the start and end times with the total samples, successful samples and distinct observed addresses. Keep failed samples in the file. Then run a small permitted task on the actual destination and record valid results and billed traffic. Use the bandwidth calculator to estimate cost from that full pilot.

If the address looks correct but its country does not, follow the location mismatch checks. If the proxy refuses authentication, resolve HTTP 407 before interpreting the rotation sequence.