Is 47.121.114.42:3129 a proxy? Yes, it was.
47.121.114.42:3129 was a public proxy in the HProxy free proxy pool, exiting from CN on Hangzhou Alibaba Advertising Co.,Ltd.. Across 2,831 checks it answered 43% of the time, and it has since gone dark (last listed 2026-07-28), so it is not a usable proxy right now.
uptime while tracked
ChinaUptime & downtime
3
Days tracked
169
Checks run
98.2%
Downtime
3
Down days
Continuous monitoring
How HProxy checks 47.121.114.42:3129
47.121.114.42:3129 has been through 2,831 checks on HProxy's list, answering 1,224 of them. Few addresses in the database carry a record this long. Here is how it was built.
11 public sources published it
47.121.114.42 appears in 11 of the public proxy sources HProxy tracks. Lists copy from each other constantly, so an address showing up in many of them says a lot about how widely it was republished and very little about whether it ever worked.
Port 3129: Squid, second instance
Port 3129 is the conventional second Squid port, commonly used for a transparent or intercepting instance running alongside the one on 3128.
Every check is a real connection
HProxy does not read this address off somebody else's list and pass it on. Each check opens an actual connection to 47.121.114.42:3129 and waits up to 4 seconds for the other end to complete a proxy handshake. Anything that does not answer in that budget counts as a failure and is recorded as one, which is why the percentage on this page moves rather than sitting at a marketing number. The handshake is attempted across HTTP, HTTPS, SOCKS4 and SOCKS5, so a proxy is never missed because we guessed the wrong protocol.
2,831 checks, 1,224 answered
That is 43% of the time, measured since June 11, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
We are still watching for it to come back
Being archived does not stop the testing. 47.121.114.42:3129 answered before, so it is exactly the kind of address that can return, and the sweep works through the whole database and reaches every address roughly once every 24 hours. Its last check was on August 3, 2026, so the next one is due within a day of that. The moment it answers again it is promoted straight back into the live free proxy list, automatically, with no manual step.
This endpoint
The record
Everything HProxy holds on 47.121.114.42:3129, and nothing it does not.
- First seen
- June 11, 2026
- Last checked
- August 3, 2026
- Next check due
- within 24 hours
- Checks run
- 2,831
- Times it answered
- 1,224
- Stopped answering
- July 28, 2026
43%
answered 1,224 of 2,831 checks
Live free proxies right now
View all →
Where this address sits
Right now our free pool holds 589 other free proxies on Alibaba, and 786 in China. 47.121.114.42:3129 sits inside that set, so if it is not usable the pages below are where its closest alternatives are.
What HProxy holds on Hangzhou Alibaba Advertising Co.,Ltd.
Open proxies are not spread evenly across the internet. They cluster, because one misconfigured template, one cheap hosting reseller or one leaked image tends to produce hundreds of identical machines on the same network. HProxy tracks 1,678 addresses on AS37963, which is 0.29% of every address in the database and a meaningful pocket of the database. 1,898 of them are answering right now, so if this particular address is not usable, the network is a reasonable place to look for one that is.
- Answering now94%
- Answered before6%
Questions about 47.121.114.42:3129
Is 47.121.114.42:3129 a working proxy?
No, not any more. It was a working public proxy in HProxy's free pool and has since gone dark, last listed 2026-07-28. We still re-test it periodically in case it returns.
Was 47.121.114.42 ever actually a proxy?
Yes. We ran 2,831 checks against it and it answered 1,224 of them, about 43% of the time, over 47 days on our list.
Where was 47.121.114.42 hosted?
China — Hangzhou Alibaba Advertising Co.,Ltd. (AS37963). It is a datacenter address, not a home connection.
Why keep a page for an address that no longer works?
Because "was this address ever a proxy, and when" is a real question. If you are looking at this IP in a firewall log or an abuse report, the dates and the check counts here are the answer. HProxy's public proxy IP list keeps every address it has ever tracked and carries on re-testing them, so deleting this record would throw all of that away.
How many free proxies are on Alibaba?
589 other free proxies are live on Alibaba (AS37963) in our pool right now, alongside 47.121.114.42:3129. Networks that host one open proxy usually host several, which is why the whole AS is worth browsing rather than just this address.
Are there other free proxies in China?
Yes, 786 free proxies are exiting from China in our pool right now, answering in 2527ms at the median. If this address is not usable, that list is the place to look for a working one.
Where to go next
Upgrade to the paid network
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Free IPs are shared and rotate out fast, so success rates swing. The paid network gives you dedicated-clean pools that hold up under load.
About this list & IP removal
Every proxy here is aggregated from publicly available sources. We do not scan or collect these IP addresses ourselves: we verify entries that are already public (live status, latency, uptime) and store nothing else about the devices behind them. The list is provided as-is, with no warranty, for lawful use only, on the basis of our legitimate interest in a free, transparent proxy directory (Art. 6 (1) (f) GDPR). Never route passwords or sensitive data through a public proxy. If an IP address is yours and you'd like it removed, email legal@hproxy.com and we'll take it down (Art. 21 GDPR). Full details on the report abuse page.