Is 52.195.147.51:9991 a proxy? Yes.
52.195.147.51:9991 is a public SOCKS5 proxy in the HProxy free proxy list, exiting from Japan. It holds a strong 96% uptime with a high 1219ms response time, and was last checked 1 h ago.
uptime
JapanOther ports on this IP
52.195.147.51 is answering on 17 ports right now.
Ports like this one rarely travel alone. We hold 17 of them on 52.195.147.51 and have run 2,346 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 52.195.147.51:9991 at 96.1% across 127 checks
| Port | Uptime | Answered | Status |
|---|---|---|---|
| 9991 | 96.1% | 122 / 127 | In the live pool |
| 4145 | 94.7% | 144 / 152 | In the live pool |
| 3128 | 94.5% | 241 / 255 | In the live pool |
| 16277 | 91.8% | 135 / 147 | In the live pool |
| 5001 | 91.5% | 182 / 199 | In the live pool |
| 8082 | 90.8% | 177 / 195 | In the live pool |
| 25851 | 90.6% | 135 / 149 | In the live pool |
| 5546 | 89.9% | 62 / 69 | In the live pool |
| 12092 | 89.3% | 176 / 197 | In the live pool |
| 44366 | 89.1% | 123 / 138 | In the live pool |
| 5867 | 89.0% | 129 / 145 | In the live pool |
| 3491 | 88.9% | 176 / 198 | In the live pool |
How this one compares
Reliable enough to sit in the top 5% 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 21,930 proxies answering right now, the middle of the pack answers 13.4% of the checks we send it.
96%
of 127 checks answered
Pool median 13.4%. 52.195.147.51:9991 is in the top 5%.
1219ms
on its last response
Pool median 1,496ms.
2
days tracked, still in the live pool
Of the 196,053 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 196,053 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 21,930 proxies answering right now.
Where this address sits
Right now our free pool holds 7,813 other free proxies on Amazon, and 2,590 in Japan. 52.195.147.51:9991 sits inside that set, so if it is not usable the pages below are where its closest alternatives are. At 1219ms it answers faster than the 1262ms median for Japan proxies (about 97% of it).
Amazon.com, Inc. is the 3rd 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 34,466 addresses on AS16509, which is 4.9% of every address in the database and a substantial share of everything HProxy tracks. That makes it the 3rd largest source of free proxies of every network we have ever seen. 7,814 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 now23%
- Answered before62%
- Never answered15%
- 1LimitedNetwork-ASAS213790227,474
- 2SECURED SERVERS LLCAS1943744,913
- 3Amazon.com, Inc.AS1650934,464
- 4SECURED SERVERS LLCAS2045428,478
- 5Cloudflare, Inc.AS1333522,879
- 6M247AS900915,995
- 7Cloudflare, Inc.AS20924214,257
- 8Alibaba (US) Technology Co., Ltd.AS4510212,161
How to use this proxy
Route a request through 52.195.147.51:9991 over SOCKS5. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x socks5://52.195.147.51:9991 \
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 52.195.147.51:9991
52.195.147.51:9991 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 52.195.147.51:9991 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 SOCKS5.
127 checks, 122 answered
That is 96% of the time, measured since August 28, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
52.195.147.51:9991 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 52.195.147.51:9991, and nothing it does not.
- First seen
- August 28, 2026
- Last checked
- August 30, 2026
- Next check due
- continuously
- Checks run
- 127
- Times it answered
- 122
- Spoke
- SOCKS5
96%
answered 122 of 127 checks
Questions about 52.195.147.51:9991
Is 52.195.147.51:9991 a working proxy right now?
Yes. 52.195.147.51:9991 answered HProxy's automated check 1 h 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 52.195.147.51?
It speaks SOCKS5, and our checks grade it elite. The port is 9991. Point your client at 52.195.147.51:9991 over socks5 to route a request through it.
Where is 52.195.147.51 located?
Traffic through it exits from Tokyo, Japan, on Amazon.com, Inc. (AS16509). That is where the destination site will think your request came from.
How fast is 52.195.147.51:9991?
It answered in 1219ms 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 52.195.147.51:9991 been?
Across 3 days of tracking it answered 96% 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 52.195.147.51:9991?
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?
7,813 other free proxies are live on Amazon (AS16509) in our pool right now, alongside 52.195.147.51:9991. 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 Japan?
Yes, 2,590 free proxies are exiting from Japan in our pool right now, answering in 1262ms 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
This one is good, and it will still disappear.
52.195.147.51:9991 has answered 96% of our checks, which puts it well above most of what we track. It is still a public endpoint with nobody standing behind it: nobody agreed to serve you, no capacity is set aside for you, and there is no warning on the day it stops. Fine for a test, a bad foundation for anything that has to work tomorrow.
Other live free proxies
View all
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.