Is 52.207.237.127:9991 a proxy? Yes.
52.207.237.127:9991 is a public HTTPS proxy in the HProxy free proxy list, exiting from United States. It holds a solid 82% uptime with a reasonable 360ms response time, and was last checked 6 min ago.
uptime
Other ports on this IP
52.207.237.127 is answering on 23 ports right now.
Ports like this one rarely travel alone. We hold 23 of them on 52.207.237.127 and have run 3,196 checks against them since August 26, 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 52.207.237.127:8080 at 88.3% across 349 checks
| Port | Uptime | Answered | Status |
|---|---|---|---|
| 8080 | 88.3% | 308 / 349 | In the live pool |
| 3128 | 86.7% | 300 / 346 | In the live pool |
| 6166 | 86.0% | 252 / 293 | In the live pool |
| 11368 | 84.7% | 200 / 236 | In the live pool |
| 22604 | 83.4% | 201 / 241 | In the live pool |
| 5132 | 83.2% | 238 / 286 | In the live pool |
| 100 | 82.8% | 164 / 198 | In the live pool |
| 21764 | 82.3% | 153 / 186 | In the live pool |
| 25192 | 80.9% | 140 / 173 | In the live pool |
| 3333 | 80.5% | 124 / 154 | In the live pool |
| 69 | 79.5% | 136 / 171 | In the live pool |
| 8099 | 79.3% | 115 / 145 | In the live pool |
How this one compares
Reliable enough to sit in the top quarter of everything we are watching.
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 9,118 proxies answering right now, the middle of the pack answers 34.4% of the checks we send it.
82%
of 39 checks answered
Pool median 34.4%. 52.207.237.127:9991 is in the top quarter.
360ms
on its last response
Pool median 2,557ms, so this one is roughly 7x quicker than typical.
1
days tracked, still in the live pool
Of the 201,660 free proxies we have watched stop working, half were gone within 28 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 201,660 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 9,118 proxies answering right now.
Where this address sits
Right now our free pool holds 253 other free proxies on Amazon, and 29,340 in United States. 52.207.237.127:9991 sits inside that set, so if it is not usable the pages below are where its closest alternatives are. At 360ms it answers faster than the 2783ms median for United States proxies (about 13% of it).
Amazon.com, Inc. is the 38th 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 1,556 addresses on AS14618, which is 0.21% of every address in the database and a meaningful pocket of the database. That makes it the 38th largest source of free proxies of every network we have ever seen. 254 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 now16%
- Answered before35%
- Never answered49%
- 1LimitedNetwork-ASAS213790227,474
- 2SECURED SERVERS LLCAS1943757,626
- 3SECURED SERVERS LLCAS2045438,786
- 4Amazon.com, Inc.AS1650937,133
- 5Cloudflare, Inc.AS1333522,890
- 6M247AS900917,540
- 7Cloudflare, Inc.AS20924214,258
- 8Alibaba (US) Technology Co., Ltd.AS4510212,171
29 networks between
38Amazon.com, Inc.AS146181,538
How to use this proxy
Route a request through 52.207.237.127:9991 over HTTPS. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x https://52.207.237.127:9991 \
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 52.207.237.127:9991
52.207.237.127:9991 is in the live pool right now, and it stays there only for as long as it keeps answering.
Port 9991: Registered port range
This port sits in the middle range, where any ordinary program can listen without special permission. The number itself carries no reserved meaning, which tells you somebody picked it on purpose instead of accepting a default.
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 52.207.237.127:9991 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 and SOCKS4 and SOCKS5.
39 checks, 32 answered
That is 82% of the time, measured since August 31, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
52.207.237.127:9991 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 52.207.237.127:9991, and nothing it does not.
- First seen
- August 31, 2026
- Last checked
- September 1, 2026
- Next check due
- continuously
- Checks run
- 39
- Times it answered
- 32
- Spoke
- HTTPS, SOCKS4, SOCKS5
82%
answered 32 of 39 checks
Questions about 52.207.237.127:9991
Is 52.207.237.127:9991 a working proxy right now?
Yes. 52.207.237.127:9991 answered HProxy's automated check 6 min 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 52.207.237.127?
It speaks HTTPS, SOCKS4, SOCKS5, and our checks grade it elite. The port is 9991. Point your client at 52.207.237.127:9991 over https to route a request through it.
Where is 52.207.237.127 located?
Traffic through it exits from Ashburn, United States, on Amazon.com, Inc. (AS14618). That is where the destination site will think your request came from.
How fast is 52.207.237.127:9991?
It answered in 360ms 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 52.207.237.127:9991 been?
Across 2 days of tracking it answered 82% 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 52.207.237.127:9991?
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?
253 other free proxies are live on Amazon (AS14618) in our pool right now, alongside 52.207.237.127:9991. 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 United States?
Yes, 29,340 free proxies are exiting from United States in our pool right now, answering in 2783ms 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.
52.207.237.127:9991 answers 82% 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
View all
34.229.190.39:50380
HTTPS · United States · 85% · 316ms
98.94.14.234:28751
SOCKS4 · United States · 90% · 340ms
18.208.158.27:8080
SOCKS4 · United States · 89% · 344ms
34.234.90.157:80
HTTPS · United States · 83% · 419ms
18.208.195.229:8080
HTTP · United States · 82% · 439ms
34.207.102.197:8090
HTTPS · United States · 20% · 441ms
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.