Is 221.156.27.138:3128 a proxy? Yes, it was.
221.156.27.138:3128 was a public proxy in the HProxy free proxy pool, exiting from South Korea on Korea Telecom. Across 1,173 checks it answered 10% of the time, and it has since gone dark (last answered July 13, 2026), so it is not a usable proxy right now.
across all 1,173 checks
South KoreaUptime & downtime
6
Days tracked
331
Checks run
95.8%
Downtime
6
Down days
Continuous monitoring
How HProxy checks 221.156.27.138:3128
221.156.27.138:3128 has been through 1,173 checks on HProxy's list, answering 112 of them. Few addresses in the database carry a record this long.
10 public sources published it
221.156.27.138 appears in 10 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 3128: Squid default
Port 3128 is the default for Squid, the most widely installed proxy software in the world. Most addresses published on 3128 are Squid servers that were meant to serve one office or one network and ended up reachable by everybody.
Every check is a real connection
HProxy does not read this address off somebody else's list and pass it on. Each check opens a real connection to 221.156.27.138:3128 and gives it up to 90 seconds to answer. Slow is not the same as dead, and plenty of working proxies take half a minute to reply. 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.
1,173 checks, 112 answered
That is 10% of the time, measured since June 25, 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. 221.156.27.138:3128 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 8, 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 221.156.27.138:3128, and nothing it does not.
- First seen
- June 25, 2026
- Last checked
- August 8, 2026
- Next check due
- within 24 hours
- Checks run
- 1,173
- Times it answered
- 112
- Stopped answering
- July 13, 2026
10%
answered 112 of 1,173 checks
Live free proxies right now
View all →
Where this address sits
Right now our free pool holds 49 other free proxies on Korea, and 364 in South Korea. 221.156.27.138:3128 sits inside that set, so if it is not usable the pages below are where its closest alternatives are.
What HProxy holds on Korea Telecom
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 2,632 addresses on AS4766, which is 0.45% of every address in the database and a meaningful pocket of the database. 49 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 now2%
- Answered before16%
- Never answered82%
Questions about 221.156.27.138:3128
Is 221.156.27.138:3128 a working proxy?
No, not any more. It was a working public proxy in HProxy's free pool and has since gone dark, last answering on July 13, 2026. We still re-test it periodically in case it returns.
Was 221.156.27.138 ever actually a proxy?
Yes. We ran 1,173 checks against it and it answered 112 of them, about 10% of the time, over 18 days on our list.
Where was 221.156.27.138 hosted?
South Korea, Korea Telecom (AS4766). It is a residential or ISP address rather than a datacenter one.
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 Korea?
49 other free proxies are live on Korea (AS4766) in our pool right now, alongside 221.156.27.138:3128. 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 South Korea?
Yes, 364 free proxies are exiting from South Korea in our pool right now, answering in 2082ms at the median. If this address is not usable, that list is the place to look for a working one.
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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.