Is 152.233.22.66:37544 a proxy? Yes.
152.233.22.66:37544 is a public HTTP proxy in the HProxy free proxy list, exiting from United States. It holds a spotty 17% uptime, and was last checked 24 h ago.
uptime
Other ports on this IP
152.233.22.66 is answering on 5,201 ports right now.
Ports like this one rarely travel alone. We hold 8,867 of them on 152.233.22.66 and have run 509,465 checks against them since August 24, 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 152.233.22.66:8019 at 58.9% across 141 checks
| Port | Uptime | Answered | Status |
|---|---|---|---|
| 8019 | 58.9% | 83 / 141 | In the live pool |
| 8220 | 50.4% | 69 / 137 | In the live pool |
| 27107 | 48.2% | 55 / 114 | In the live pool |
| 8080 | 45.3% | 120 / 265 | In the live pool |
| 26395 | 44.3% | 51 / 115 | In the live pool |
| 35055 | 43.7% | 59 / 135 | In the live pool |
| 27834 | 42.7% | 50 / 117 | In the live pool |
| 8109 | 42.6% | 58 / 136 | In the live pool |
| 28776 | 42.6% | 49 / 115 | In the live pool |
| 35014 | 41.4% | 55 / 133 | In the live pool |
| 35128 | 40.2% | 53 / 132 | In the live pool |
| 8178 | 38.8% | 52 / 134 | In the live pool |
How this one compares
126 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 6,547 proxies answering right now, the middle of the pack answers 22.4% of the checks we send it.
17%
of 126 checks answered
Pool median 22.4%. 152.233.22.66:37544 sits below it, which is ordinary for a public proxy.
126
real connection attempts
Each one opens a socket and waits up to 90 seconds. Slow and unreachable look identical if you stop listening early.
2
days tracked, still in the live pool
Of the 195,873 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 195,873 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 6,547 proxies answering right now.
Where this address sits
Right now our free pool holds no other free proxies on Cdn77, and 9,275 in United States. 152.233.22.66:37544 sits inside that set, so if it is not usable the pages below are where its closest alternatives are.
CDN77 is the 11th 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 9,021 addresses on AS60068, which is 1.3% of every address in the database and a substantial share of everything HProxy tracks. That makes it the 11th largest source of free proxies of every network we have ever seen. None of them are answering at the moment, though every one stays in the re-check rotation in case that changes.
- Answered before51%
- Never answered49%
- 1LimitedNetwork-ASAS213790227,474
- 2Amazon.com, Inc.AS1650933,538
- 3SECURED SERVERS LLCAS1943731,974
- 4Cloudflare, Inc.AS1333522,878
- 5SECURED SERVERS LLCAS2045419,479
- 6M247AS900915,355
- 7Cloudflare, Inc.AS20924214,257
- 8Alibaba (US) Technology Co., Ltd.AS4510212,158
2 networks between
11CDN77AS600689,021
How to use this proxy
Route a request through 152.233.22.66:37544 over HTTP. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x http://152.233.22.66:37544 \
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 152.233.22.66:37544
152.233.22.66:37544 is in the live pool right now, and it stays there only for as long as it keeps answering.
Port 37544: 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 152.233.22.66:37544 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 HTTP.
126 checks, 22 answered
That is 17% of the time, measured since August 26, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
152.233.22.66:37544 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 152.233.22.66:37544, and nothing it does not.
- First seen
- August 26, 2026
- Last checked
- August 28, 2026
- Next check due
- continuously
- Checks run
- 126
- Times it answered
- 22
- Spoke
- HTTP
17%
answered 22 of 126 checks
Questions about 152.233.22.66:37544
Is 152.233.22.66:37544 a working proxy right now?
Yes. 152.233.22.66:37544 answered HProxy's automated check 24 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 152.233.22.66?
It speaks HTTP. The port is 37544. Point your client at 152.233.22.66:37544 over http to route a request through it.
Where is 152.233.22.66 located?
Traffic through it exits from Miami, United States, on CDN77 (AS60068). That is where the destination site will think your request came from.
How reliable has 152.233.22.66:37544 been?
Across 3 days of tracking it answered 17% 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 152.233.22.66:37544?
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 Cdn77?
None other than 152.233.22.66:37544 at the moment. AS60068 (Cdn77) has no other free proxies live in our pool right now, though that changes as we re-verify.
Are there other free proxies in United States?
Yes, 9,275 free proxies are exiting from United States in our pool right now, answering in 846ms 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.
152.233.22.66:37544 answers 17% 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
138.199.25.13:3907
HTTP · Singapore · 8% · 0ms
144.31.78.57:3128
HTTP · United States · 67% · 58ms
18.208.158.27:27025
HTTP · United States · 94% · 281ms
98.94.14.234:10946
SOCKS4 · United States · 97% · 284ms
52.207.237.127:22604
SOCKS4 · United States · 93% · 288ms
34.229.190.39:56753
HTTP · United States · 94% · 290ms
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.