Is 174.138.163.51:39940 a proxy? Yes.
174.138.163.51:39940 is a public HTTP proxy in the HProxy free proxy list, exiting from United States. It holds a solid 86% uptime with a high 11986ms response time, and was last checked 24 min ago.
uptime
United StatesOther ports on this IP
174.138.163.51 is answering on 630 ports right now.
Ports like this one rarely travel alone. We hold 694 of them on 174.138.163.51 and have run 24,153 checks against them since May 13, 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 174.138.163.51:9998 at 31.1% across 106 checks
| Port | Uptime | Answered | Status |
|---|---|---|---|
| 9998 | 31.1% | 33 / 106 | In the live pool |
| 8254 | 27.6% | 24 / 87 | In the live pool |
| 56978 | 24.3% | 25 / 103 | In the live pool |
| 32975 | 20.4% | 21 / 103 | In the live pool |
| 8001 | 19.3% | 62 / 321 | In the live pool |
| 65220 | 9.3% | 28 / 302 | In the live pool |
| 8880 | 9.2% | 27 / 295 | In the live pool |
| 30617 | 7.0% | 20 / 286 | In the live pool |
| 37229 | 6.6% | 20 / 302 | In the live pool |
| 63709 | 6.3% | 19 / 302 | In the live pool |
| 52425 | 6.2% | 19 / 306 | In the live pool |
| 55048 | 5.8% | 17 / 295 | 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 11,208 proxies answering right now, the middle of the pack answers 21.8% of the checks we send it.
86%
of 7 checks answered
Pool median 21.8%. 174.138.163.51:39940 is in the top quarter.
11986ms
on its last response
Pool median 3,646ms.
0
days tracked, still in the live pool
Of the 196,661 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 196,661 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 11,208 proxies answering right now.
Where this address sits
Right now our free pool holds 1,567 other free proxies on Secured Servers, and 23,328 in United States. 174.138.163.51:39940 sits inside that set, so if it is not usable the pages below are where its closest alternatives are. At 11986ms it is slower than the 8565ms median for United States proxies.
SECURED SERVERS LLC is the 4th 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 28,919 addresses on AS20454, which is 4.1% of every address in the database and a substantial share of everything HProxy tracks. That makes it the 4th largest source of free proxies of every network we have ever seen. 1,568 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 now5%
- Answered before58%
- Never answered36%
- 1LimitedNetwork-ASAS213790227,474
- 2SECURED SERVERS LLCAS1943745,101
- 3Amazon.com, Inc.AS1650934,473
- 4SECURED SERVERS LLCAS2045428,919
- 5Cloudflare, Inc.AS1333522,886
- 6M247AS900915,995
- 7Cloudflare, Inc.AS20924214,257
- 8Alibaba (US) Technology Co., Ltd.AS4510212,164
How to use this proxy
Route a request through 174.138.163.51:39940 over HTTP. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x http://174.138.163.51:39940 \
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 174.138.163.51:39940
174.138.163.51:39940 is in the live pool right now, and it stays there only for as long as it keeps answering.
Port 39940: 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 174.138.163.51:39940 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.
7 checks, 6 answered
That is 86% of the time, measured since August 30, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
174.138.163.51:39940 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 174.138.163.51:39940, and nothing it does not.
- First seen
- August 30, 2026
- Last checked
- August 30, 2026
- Next check due
- continuously
- Checks run
- 7
- Times it answered
- 6
- Spoke
- HTTP
86%
answered 6 of 7 checks
Questions about 174.138.163.51:39940
Is 174.138.163.51:39940 a working proxy right now?
Yes. 174.138.163.51:39940 answered HProxy's automated check 24 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 174.138.163.51?
It speaks HTTP, and our checks grade it elite. The port is 39940. Point your client at 174.138.163.51:39940 over http to route a request through it.
Where is 174.138.163.51 located?
Traffic through it exits from Phoenix, United States, on SECURED SERVERS LLC (AS20454). That is where the destination site will think your request came from.
How fast is 174.138.163.51:39940?
It answered in 11986ms 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 174.138.163.51:39940 been?
Across 1 day of tracking it answered 86% 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 174.138.163.51:39940?
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 Secured Servers?
1,567 other free proxies are live on Secured Servers (AS20454) in our pool right now, alongside 174.138.163.51:39940. 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, 23,328 free proxies are exiting from United States in our pool right now, answering in 8565ms 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.
174.138.163.51:39940 answers 86% 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 all174.138.163.54:39109
HTTP · United States · 29% · 1085ms
174.138.163.53:8254
HTTP · United States · 38% · 1806ms
174.138.163.50:21711
HTTP · United States · 0% · 1917ms
174.138.163.52:52462
HTTP · United States · 2% · 5427ms
174.138.165.211:37136
HTTP · United States · 53% · 518ms
174.138.165.213:38400
HTTP · United States · 44% · 576ms
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.