ColombiaUptime & downtime
7
Days tracked
357
Checks run
84%
Downtime
7
Down days
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 8,735 proxies answering right now, the middle of the pack answers 13.8% of the checks we send it.
17%
of 2,840 checks answered
Pool median 13.8%. 181.236.221.138:4145 is in the top quarter.
2,840
real connection attempts
Each one opens a socket and waits up to 90 seconds. Slow and unreachable look identical if you stop listening early.
51
days tracked, still in the live pool
Of the 193,370 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 193,370 endpoints that stopped working.
Middle halfMedianFull range
How quickly one answers
Response time on the last successful check, across the 8,735 proxies answering right now.
Where this address sits
Right now our free pool holds no other free proxies on Colombia Telecomunicaciones, and 120 in Colombia. 181.236.221.138:4145 sits inside that set, so if it is not usable the pages below are where its closest alternatives are.
How many free proxies are on COLOMBIA TELECOMUNICACIONES S.A. ESP
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 82 addresses on AS3816, which is 0.01% of every address in the database and a small corner of the database. None of them are answering at the moment, though every one stays in the re-check rotation in case that changes.
- Answered before11%
- Never answered89%
- 1LimitedNetwork-ASAS213790227,266
- 2Amazon.com, Inc.AS1650927,096
- 3Cloudflare, Inc.AS1333522,185
- 4SECURED SERVERS LLCAS2045419,475
- 5Cloudflare, Inc.AS20924214,140
- 6Alibaba (US) Technology Co., Ltd.AS4510211,678
- 7GloboTech CommunicationsAS3666611,542
- 8ChinanetAS41348,373
- AS3816 sits outside the 250 largest networks we hold.
How to use this proxy
Route a request through 181.236.221.138:4145 over HTTP. Free proxies are shared and rotate out fast, so test before you rely on it.
curl -x http://181.236.221.138:4145 \
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 181.236.221.138:4145
181.236.221.138:4145 is in the live pool right now, and it stays there only for as long as it keeps answering.
Port 4145: SOCKS4, common
Port 4145 is everywhere in free proxy lists, nearly always as SOCKS4. No standards body ever gave it that job. It stuck because everyone copied everyone else, so treat the number as a strong hint rather than a promise.
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 181.236.221.138:4145 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.
2,840 checks, 483 answered
That is 17% of the time, measured since June 23, 2026. Every one of those results, successes and failures alike, is a connection HProxy opened itself.
It is being re-tested continuously
181.236.221.138:4145 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 181.236.221.138:4145, and nothing it does not.
- First seen
- June 23, 2026
- Last checked
- August 13, 2026
- Next check due
- continuously
- Checks run
- 2,840
- Times it answered
- 483
- Spoke
- HTTP
17%
answered 483 of 2,840 checks
Questions about 181.236.221.138:4145
Is 181.236.221.138:4145 a working proxy right now?
Yes. 181.236.221.138:4145 answered HProxy's automated check 9 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 181.236.221.138?
It speaks HTTP. The port is 4145. Point your client at 181.236.221.138:4145 over http to route a request through it.
Where is 181.236.221.138 located?
Traffic through it exits from Medellin, Colombia, on COLOMBIA TELECOMUNICACIONES S.A. ESP (AS3816). That is where the destination site will think your request came from.
How reliable has 181.236.221.138:4145 been?
Across 52 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 181.236.221.138:4145?
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 Colombia Telecomunicaciones?
None other than 181.236.221.138:4145 at the moment. AS3816 (Colombia Telecomunicaciones) has no other free proxies live in our pool right now, though that changes as we re-verify.
Are there other free proxies in Colombia?
Yes, 120 free proxies are exiting from Colombia in our pool right now, answering in 5365ms 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.
181.236.221.138:4145 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 →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.