Is 18.191.250.90:4443 a proxy? Yes.
18.191.250.90:4443 is a public HTTPS proxy in the HProxy free proxy list, exiting from United States. It holds a spotty 14% uptime with a high 2117ms response time, and was last checked yesterday.
uptime
Other ports on this IP
18.191.250.90 is answering on 30 ports right now.
Ports like this one rarely travel alone. We hold 154 of them on 18.191.250.90 and have run 282,904 checks against them since June 23, 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 18.191.250.90:1080 at 14.1% across 4,235 checks
| Port | Uptime | Answered | Status |
|---|---|---|---|
| 1080 | 14.1% | 598 / 4,235 | Not responding |
| 32120 | 13.6% | 521 / 3,841 | Not responding |
| 13467 | 13.3% | 514 / 3,867 | Not responding |
| 56313 | 12.9% | 442 / 3,431 | In the live pool |
| 49412 | 12.9% | 491 / 3,815 | Not responding |
| 1090 | 12.8% | 554 / 4,332 | Not responding |
| 49430 | 12.5% | 474 / 3,805 | Not responding |
| 9988 | 12.4% | 476 / 3,827 | Not responding |
| 32419 | 12.3% | 464 / 3,783 | Not responding |
| 45053 | 12.2% | 517 / 4,236 | Not responding |
| 9878 | 12.2% | 501 / 4,112 | In the live pool |
| 1100 | 12.2% | 476 / 3,908 | Not responding |
How this one compares
905 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 5,804 proxies answering right now, the middle of the pack answers 29.4% of the checks we send it.
14%
of 905 checks answered
Pool median 29.4%. 18.191.250.90:4443 sits below it, which is ordinary for a public proxy.
2117ms
on its last response
Pool median 7,158ms, so this one is roughly 3x quicker than typical.
27
days tracked, still in the live pool
Of the 286,259 free proxies we have watched stop working, half were gone within 25 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 286,259 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 5,804 proxies answering right now.
Where this address sits
Right now our free pool holds 130 other free proxies on Amazon, and 28,293 in United States. 18.191.250.90:4443 sits inside that set, so if it is not usable the pages below are where its closest alternatives are. At 2117ms it answers faster than the 5971ms median for United States proxies (about 35% of it).
Amazon.com, Inc. 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 46,281 addresses on AS16509, which is 5.8% 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. 131 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 before81%
- Never answered19%
- 1LimitedNetwork-ASAS213790227,474
- 2SECURED SERVERS LLCAS1943779,187
- 3SECURED SERVERS LLCAS2045448,976
- 4Amazon.com, Inc.AS1650946,275
- 5M247AS900933,779
- 6Cloudflare, Inc.AS1333522,925
- 7Cloudflare, Inc.AS20924214,276
- 8Alibaba (US) Technology Co., Ltd.AS4510212,286
How to use this proxy
Route a request through 18.191.250.90:4443 over HTTPS. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x https://18.191.250.90:4443 \
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 18.191.250.90:4443
18.191.250.90:4443 is in the live pool right now, and it stays there only for as long as it keeps answering.
Port 4443: 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 18.191.250.90:4443 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.
905 checks, 130 answered
That is 14% of the time, measured since August 27, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
18.191.250.90:4443 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 18.191.250.90:4443, and nothing it does not.
- First seen
- August 27, 2026
- Last checked
- September 23, 2026
- Next check due
- continuously
- Checks run
- 905
- Times it answered
- 130
- Spoke
- HTTPS
14%
answered 130 of 905 checks
Questions about 18.191.250.90:4443
Is 18.191.250.90:4443 a working proxy right now?
Yes. 18.191.250.90:4443 answered HProxy's automated check yesterday 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 18.191.250.90?
It speaks HTTPS, and our checks grade it elite. The port is 4443. Point your client at 18.191.250.90:4443 over https to route a request through it.
Where is 18.191.250.90 located?
Traffic through it exits from Columbus, United States, on Amazon.com, Inc. (AS16509). That is where the destination site will think your request came from.
How fast is 18.191.250.90:4443?
It answered in 2117ms 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 18.191.250.90:4443 been?
Across 28 days of tracking it answered 14% 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 18.191.250.90:4443?
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?
130 other free proxies are live on Amazon (AS16509) in our pool right now, alongside 18.191.250.90:4443. 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, 28,293 free proxies are exiting from United States in our pool right now, answering in 5971ms 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.
18.191.250.90:4443 answers 14% 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
18.188.53.175:36670
HTTPS · United States · 11% · 75ms
18.188.168.99:13543
HTTPS · United States · 11% · 76ms
3.19.213.118:55138
HTTPS · United States · 11% · 76ms
18.222.132.180:21832
HTTPS · United States · 9% · 97ms
40.177.99.164:8298
HTTPS · Canada · 11% · 106ms
18.190.253.157:6369
HTTPS · United States · 12% · 114ms
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.