Is 4.221.164.109:443 a proxy? Yes, it was.
4.221.164.109:443 was a public proxy in the HProxy free proxy pool, exiting from South Africa on Microsoft Corporation. Across 1,174 checks it answered 81% of the time, and it has since gone dark (last answered June 24, 2026), so it is not a usable proxy right now.
across all 1,174 checks
South AfricaUptime & downtime
10
Days tracked
222
Checks run
0.9%
Downtime
0
Down days
How this one compares
It was one of the good ones, for 23 days.
Every free proxy list quotes an uptime figure. Almost none of them tell you what a normal one looks like, so here is ours: across the 8,765 proxies answering right now, the middle of the pack answers 13.8% of the checks we send it.
81%
of 1,174 checks answered
Pool median 13.8%. 4.221.164.109:443 is in the top quarter.
1,174
real connection attempts
Each one opens a socket and waits up to 90 seconds. Slow and unreachable look identical if you stop listening early.
23
days from first sighting to last answer
Of the 193,375 free proxies we have watched stop working, half were gone within 28 days of us first seeing them.
June 1, 2026
First listed by our sources
Published as a working proxy by 56 of the public lists HProxy tracks. Being listed is a claim, not a test.
June 24, 2026
Stopped answering
It answered our checks for 23 days before it went quiet.
June 27, 2026
Moved to the permanent record
It left the live pool here. Nothing is deleted: the address keeps this page and stays in the re-check rotation.
August 13, 2026
Most recent re-test
HProxy has opened 1,174 real connections to this endpoint in total. The sweep reaches every address in the database roughly once every 24 hours.
What normal looks like
Every number above is measured against these two.
A percentage on a proxy list means nothing without the shape of the thing it came from. These are the two distributions the rest of this page compares against, drawn from HProxy's own checks rather than from anybody's marketing page.
How long one lasts
Days from the first time we saw an address to the last time it answered, across 193,375 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 8,765 proxies answering right now.
Continuous monitoring
How HProxy checks 4.221.164.109:443
4.221.164.109:443 has been through 1,174 checks on HProxy's list, answering 946 of them. Few addresses in the database carry a record this long.
56 public sources published it
4.221.164.109 appears in 56 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 443: HTTPS
Port 443 carries encrypted web traffic. It is the last port any network will block, because blocking it breaks almost everything else, and that is exactly why proxies get put there.
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 4.221.164.109:443 and gives it up to 90 seconds to answer. Slow is not the same as unreachable, 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.
1,174 checks, 946 answered
That is 81% of the time, measured since June 1, 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. 4.221.164.109:443 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 13, 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 4.221.164.109:443, and nothing it does not.
- First seen
- June 1, 2026
- Last checked
- August 13, 2026
- Next check due
- within 24 hours
- Checks run
- 1,174
- Times it answered
- 946
- Stopped answering
- June 24, 2026
81%
answered 946 of 1,174 checks
Live free proxies right now
View all →
Where this address sits
Right now our free pool holds 20 other free proxies on Microsoft, and 279 in South Africa. 4.221.164.109:443 sits inside that set, so if it is not usable the pages below are where its closest alternatives are.
Microsoft Corporation is the 58th largest source of free proxies we have ever measured.
Open proxies cluster rather than spreading evenly across the internet. Hosting providers and cloud platforms run enormous numbers of near-identical servers, so a handful of networks end up carrying a disproportionate share of every public proxy list, including ours. HProxy tracks 951 addresses on AS8075, which is 0.16% of every address in the database and a meaningful pocket of the database. That makes it the 58th largest source of free proxies of every network we have ever seen. 20 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 before11%
- Never answered87%
- 1LimitedNetwork-ASAS213790227,266
- 2Amazon.com, Inc.AS1650927,108
- 3Cloudflare, Inc.AS1333522,185
- 4SECURED SERVERS LLCAS2045419,475
- 5Cloudflare, Inc.AS20924214,140
- 6Alibaba (US) Technology Co., Ltd.AS4510211,678
- 7GloboTech CommunicationsAS3666611,542
- 8ChinanetAS41348,373
49 networks between
58Microsoft CorporationAS8075951
Questions about 4.221.164.109:443
Is 4.221.164.109:443 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 June 24, 2026. We still re-test it periodically in case it returns.
Was 4.221.164.109 ever actually a proxy?
Yes. We ran 1,174 checks against it and it answered 946 of them, about 81% of the time, over 23 days on our list.
What is the hostname for 4.221.164.109?
4.221.164.109 publishes no reverse DNS record. That is not unusual and it is not suspicious on its own, but it does mean the address volunteers nothing about who runs it, so the network and the check history below are all there is to go on.
Where was 4.221.164.109 hosted?
Johannesburg, Gauteng, South Africa, Microsoft Corporation (AS8075). 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 Microsoft?
20 other free proxies are live on Microsoft (AS8075) in our pool right now, alongside 4.221.164.109:443. 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 Africa?
Yes, 279 free proxies are exiting from South Africa in our pool right now, answering in 600ms 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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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.