Is 16.52.81.236:50872 a proxy? Yes.
16.52.81.236:50872 is a public HTTPS proxy in the HProxy free proxy list, exiting from Canada. It holds a spotty 4% uptime with a reasonable 271ms response time, and last answered our checker 4 hr ago.
uptime
CanadaOther ports on this IP
16.52.81.236 is answering on 76 ports right now.
Ports like this one rarely travel alone. We hold 243 of them on 16.52.81.236 and have run 564,227 checks against them since June 11, 2026. When an address turns up on public lists across this many ports, each port is published as its own entry, so each one gets its own record here.
Best responding ports
Best on this IP is 16.52.81.236:9058 at 14.2% across 4,750 checks
| Port | Uptime | Answered | Status |
|---|---|---|---|
| 9058 | 14.2% | 674 / 4,750 | Not responding |
| 25327 | 14.1% | 673 / 4,786 | Not responding |
| 5566 | 14.0% | 657 / 4,704 | Not responding |
| 49219 | 13.9% | 651 / 4,700 | Not responding |
| 1903 | 13.8% | 657 / 4,753 | Not responding |
| 7531 | 13.8% | 644 / 4,668 | Not responding |
| 7277 | 13.6% | 632 / 4,640 | Not responding |
| 7125 | 13.5% | 632 / 4,696 | Not responding |
| 15349 | 13.4% | 633 / 4,732 | Not responding |
| 31641 | 13.4% | 637 / 4,769 | Not responding |
| 39394 | 13.3% | 653 / 4,919 | Not responding |
| 21506 | 13.3% | 630 / 4,753 | Not responding |
How this one compares
206 checks in, its uptime is ordinary for a free proxy.
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 5,505 proxies answering right now, the middle of the pack answers 30.9% of the checks we send it.
4%
of 206 checks answered
Pool median 30.9%. 16.52.81.236:50872 sits below it, which is ordinary for a public proxy.
271ms
on its last response
Pool median 5,757ms, so this one is roughly 21x quicker than typical.
15
days tracked, still in the live pool
Of the 357,867 free proxies we have watched stop working, half were gone within 23 days of us first seeing them.
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 357,867 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 5,505 proxies answering right now.
Where this address sits
Right now our free pool holds 99 other free proxies on Amazon, and 553 in Canada. 16.52.81.236:50872 sits inside that set, so if it is not usable the pages below are where its closest alternatives are. At 271ms it answers faster than the 436ms median for Canada proxies (about 62% of it).
Amazon.com, Inc. is the 5th 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 48,328 addresses on AS16509, which is 5.4% of every address in the database and a substantial share of everything HProxy tracks. That makes it the 5th largest source of free proxies of every network we have ever seen. 100 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 now<1%
- Answered before80%
- Never answered19%
- 1LimitedNetwork-ASAS213790227,474
- 2SECURED SERVERS LLCAS19437120,032
- 3M247AS900960,013
- 4SECURED SERVERS LLCAS2045456,868
- 5Amazon.com, Inc.AS1650948,272
- 6Cloudflare, Inc.AS1333522,929
- 7Cloudflare, Inc.AS20924214,276
- 8Alibaba (US) Technology Co., Ltd.AS4510212,337
How to use this proxy
Route a request through 16.52.81.236:50872 over HTTPS. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x https://16.52.81.236:50872 \
https://api.ipify.org?format=json
Not a terminal person? Pick your device and we walk you through it, nothing assumed.
Continuous monitoring
How HProxy checks 16.52.81.236:50872
16.52.81.236:50872 is in the live pool right now, and it stays there only for as long as it keeps answering.
Port 50872: Ephemeral port range
This is a throwaway port number, the kind a computer hands out for a few minutes and then takes back. Anything published on one tends to move or disappear when its host restarts, which is a large part of why public proxy lists rot so fast.
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 16.52.81.236:50872 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, which is how we know it spoke HTTPS.
206 checks, 8 answered
That is 4% of the time, measured since September 18, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
16.52.81.236:50872 is in the live rotation, so it is re-tested continuously rather than on a daily cycle. If it stops answering it is marked down immediately, and if it stays down for 3 days it moves into the public proxy database with its full record intact. Nothing is deleted at any point.
This endpoint
The record
Everything HProxy holds on 16.52.81.236:50872, and nothing it does not.
- First seen
- September 18, 2026
- Last checked
- October 1, 2026
- Next check due
- continuously
- Checks run
- 206
- Times it answered
- 8
- Spoke
- HTTPS
4%
answered 8 of 206 checks
Questions about 16.52.81.236:50872
Is 16.52.81.236:50872 a working proxy right now?
Yes. 16.52.81.236:50872 answered HProxy's automated check 4 hr ago and is in the live free proxy pool as we publish this page. It is re-tested every few minutes, so open this page again for its current state rather than trusting a copy of it.
What kind of proxy is 16.52.81.236?
It speaks HTTPS, and our checks grade it elite. The port is 50872. Point your client at 16.52.81.236:50872 over https to route a request through it.
Where is 16.52.81.236 located?
Traffic through it exits from Montreal, Canada, on Amazon.com, Inc. (AS16509). That is where the destination site will think your request came from.
How fast is 16.52.81.236:50872?
It answered in 271ms on the last check. Free public proxies are shared, so real-world speed varies with how many other people are using it at the same moment.
How reliable has 16.52.81.236:50872 been?
Across 14 days of tracking it answered 4% of our checks. The chart on this page shows every day we have recorded for it, including the days it was down.
Is it safe to use 16.52.81.236:50872?
Treat it the way you would any public proxy: it is operated by someone we have no relationship with, it is shared with strangers, and anything you send unencrypted over it can be read. Fine for a quick geo check or a scrape of public data, never for logins, payments or anything private.
How many free proxies are on Amazon?
99 other free proxies are live on Amazon (AS16509) in our pool right now, alongside 16.52.81.236:50872. 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 Canada?
Yes, 553 free proxies are exiting from Canada in our pool right now, answering in 436ms 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
Free proxies fail. This is what that looks like.
16.52.81.236:50872 answers 4% of the time, and that is ordinary for a public proxy. Nothing here is a service anybody sells you, which is why the numbers swing and why the list turns over constantly.
Other live free proxies
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18.190.253.157:35658
HTTPS · United States · 11% · 91ms
18.188.53.175:80
HTTPS · United States · 13% · 96ms
18.222.132.180:8070
HTTPS · United States · 11% · 105ms
18.191.250.90:21017
HTTPS · United States · 11% · 106ms
3.134.245.77:8082
HTTPS · United States · 7% · 111ms
3.21.247.154:37595
HTTPS · United States · 28% · 120ms
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.