How to Test Telegram Proxy Leak in 2026 (MTProto)

what you will end up with

Follow these steps and you will know exactly what IP Telegram’s servers see when you connect. Confirmed from two independent angles: Telegram’s own active session record and a third-party lookup running over the same connection. If you are running SOCKS5, the command-line step also catches DNS leaks that the in-app check misses entirely. The full process takes under 15 minutes and requires no special software beyond a terminal.

before you start

You need a Telegram account on any recent client (Android 10.x, iOS 10.x, or Telegram Desktop 5.x and above all work), an MTProto or SOCKS5 proxy already configured and showing as connected inside Telegram settings, a browser tab you can open while the proxy is active, and a terminal if you want to run the SOCKS5 verification. No root access required on any device. If you are not sure which proxy type you are using, go to Settings > Data and Storage > Proxy and look at the type field before you start.

# verify Telegram Desktop version on Linux before starting
telegram-desktop --version
# on macOS: /Applications/Telegram.app/Contents/MacOS/Telegram --version
# Android/iOS: Settings > About > App version

the step-by-step

1. Confirm the proxy shows as connected.

Open Telegram, go to Settings > Data and Storage > Proxy. The proxy entry should show a green dot or “Connected” status. If it shows “Connecting” or a red dot, stop here. A failed connection means Telegram has already fallen back to your real network. Fix the proxy first, then test.

2. Open Active Sessions.

Go to Settings > Privacy and Security > Active Sessions (same path on desktop). You will see a list of every device logged into your account. At the top is your current session, labelled “This device” or whatever device name you set. Look at the line directly below the device name. It shows a flag, a city, and an IP address. That IP is what Telegram’s servers recorded when this session was created or last verified.

3. Write down that IP and the country it resolves to.

Do not screenshot just yet. The active session IP is a point-in-time record, and some proxy configurations cycle addresses. Copy the IP manually or note the country. If the country shown is your home country, or if the IP is in a range you recognize as your ISP’s, you already have the answer: the proxy is not working, or it bypassed Telegram traffic at connection time.

4. Without disconnecting from the proxy, open a browser tab and go to whatismyipaddress.com.

What you see here is the public IP your browser is presenting right now to that external server. If your proxy is set system-wide or configured as a device-level SOCKS5 proxy, this browser lookup will also go through it. If your proxy is Telegram-only (set inside Telegram’s own proxy settings rather than at OS or VPN level), this browser check will show your real ISP IP. That is expected. In that case, skip comparing these two numbers and focus only on the active session IP from step 2 versus your known home IP.

5. Compare the two IPs against each other and against your home IP.

Three possible states. First: the active session IP matches whatismyipaddress.com and neither is your home IP. A system-wide proxy is routing everything, and it looks clean. Second: the active session IP differs from whatismyipaddress.com but neither is your home IP. Normal for a Telegram-only proxy. Telegram goes through the proxy, your browser does not. Third: either the active session IP or the browser IP is your home ISP address. That is the leak. The test telegram proxy leak check has just caught your real IP being exposed.

6. Run the SOCKS5 command-line verification.

This step catches what the in-app check misses: DNS leaks. When a SOCKS5 client resolves domain names locally before sending the connection through the proxy, your DNS queries go to your ISP even though the TCP traffic goes through the proxy. Telegram’s own proxy implementation uses remote DNS resolution correctly for MTProto connections, but third-party clients and some desktop setups do not. Run the following to force remote DNS and check what IP an external service sees:

# socks5h:// forces DNS resolution through the proxy, not locally
# replace proxy.host, port, user, and pass with your proxy credentials
curl -x socks5h://user:[email protected]:1080 \
  --max-time 10 \
  https://api.ipify.org

# if no auth required:
curl -x socks5h://proxy.host:1080 \
  --max-time 10 \
  https://api.ipify.org

The response is a single IP address. That should match the active session IP from step 2. If it does not, or if the command fails and falls back to a direct connection, the proxy is not handling all your traffic. The h suffix on socks5h is the critical part. Without it, curl resolves DNS locally and your home ISP’s DNS handles your queries even if the TCP hop goes through the proxy.

7. Cross-check with a second IP lookup endpoint.

Run the same curl command again but point it at a different IP reflection service. Consistency across two different endpoints removes the possibility that one service is caching a stale address or geolocating incorrectly. If both agree on the same IP and it is not your home address, your test telegram proxy leak check is passing. If they disagree, you may be hitting a CDN or anycast endpoint that geolocates differently. Not a leak, but it can confuse the picture.

8. Close the session and reconnect, then recheck Active Sessions.

After a full disconnect and reconnect, Telegram may log a new session entry. If the new session shows a different IP from the old one, and both are non-home IPs, you are likely behind a rotating proxy. Rotating proxies are a separate problem: Telegram may treat repeated IP changes as suspicious behavior. The platform’s own guidance in the telegram.org/mtproto" target="_blank" rel="noopener">MTProto protocol documentation does not specify session invalidation thresholds, but from watching dozens of customer accounts on our farm, unpredictable IP rotation is one of the faster ways to get a session kicked. More on this in the dedicated vs shared IP post linked below.

what can go wrong

The active session shows your home IP even though the proxy says “Connected.”

This usually means Telegram connected before the proxy was ready, or the proxy failed silently and Telegram retried directly. Force a full disconnect: go to Settings > Data and Storage > Proxy, toggle the proxy off, wait five seconds, toggle it back on, then log out and log back in. The new session will be created through the proxy from scratch. After that, repeat step 2. Do not just check the existing session entry; it will still show the old IP until a new one is created.

The curl test hangs or times out instead of returning an IP.

The proxy is refusing connections from outside Telegram’s own client. Some MTProto-only proxies are configured to accept the MTProto obfuscation layer but drop raw SOCKS5 or HTTPS traffic. Not necessarily a leak, but it means you cannot use curl to verify. Revert to the active session check in step 2 as your primary method, and consider switching to a proxy that supports SOCKS5 or HTTP CONNECT if you need command-line verification.

Active Sessions shows “Unknown” for location.

Telegram could not geolocate the IP your proxy gave it. This happens with some residential proxy providers who operate IPs that have not propagated through common geolocation databases. Unknown is not the same as leaked, but it is also not ideal. Run the curl test from step 6 and then manually look up the returned IP on a geolocation service to understand what country and ISP it resolves to. If the ISP name looks like a known proxy or VPN provider rather than a mobile carrier, expect more scrutiny from Telegram’s anti-fraud layer.

The two IP lookup endpoints return different IPs.

You are likely hitting an anycast IP range, or one of the endpoints is behind a CDN that reflects the CDN node’s IP rather than yours. Switch to a simpler plain HTTP endpoint that does not use CDN acceleration, or compare the ASN (autonomous system number) of both results rather than the raw IP. If both ASNs match, the IPs are in the same network and the discrepancy is cosmetic. If the ASNs differ, one of the connections is not going through the proxy.

how this looks on managed hosting

On a telegramvault cloud phone, you skip steps 1 through 5 entirely. The session lives on a dedicated Android device in our Singapore farm, connected permanently to a single SIM card on SingTel, M1, StarHub, or Vivifi. That SIM’s IP is static. When you open the browser-based STF session and look at Active Sessions, the IP you see is the carrier IP for that specific SIM. It does not change. No proxy configuration to test, no SOCKS5 credential to verify, and no scenario where Telegram’s session was created before the “proxy” was ready, because the phone is always on the same mobile network. The test telegram proxy leak process reduces to a single step: open Active Sessions and confirm the IP is in Singapore and is not your home address. If the IP ever changes or shows a non-Singapore location, contact us and we will investigate at the hardware level.

recovery if you mess up

If you disconnected everything and now have multiple orphaned session entries in Active Sessions, terminate all sessions except the one on your current trusted device. Go to Settings > Privacy and Security > Active Sessions > Terminate All Other Sessions. Telegram will immediately invalidate those session tokens. After that, reconnect cleanly through your proxy as described in step 8.

If Telegram has sent you a security notification saying a new login was detected from an unusual location, that is a sign your session IP changed in a way Telegram flagged. Do not ignore these. Confirm via the Active Sessions list that the new IP is your intended proxy IP, and if it is not, change your proxy credentials immediately. Telegram support response times for account-level issues run anywhere from 24 hours to several weeks depending on your account’s standing and region. Do not count on a support ticket to resolve an active leak faster than you can fix the configuration yourself.

If your account gets a temporary restriction and you believe it was triggered by the IP inconsistency, the standard playbook is: stop all connections, wait 24 to 48 hours, reconnect from a single clean IP, and avoid sending high-volume messages for the first few days. OONI’s research on messenger blocking patterns shows that repeated authentication events from shifting IPs are a consistent signal for platform-level restrictions, not just with Telegram. Consistency matters more than the specific country the IP is in.

Understanding which behaviors actually trigger bans is worth reading separately. The why Telegram bans accounts post covers this in detail, including which signals the platform weighs most heavily.

Choosing between dedicated and shared IPs. If your test telegram proxy leak check passes today but you keep seeing session warnings every few weeks, the underlying issue may be IP sharing rather than a proxy configuration error. A shared proxy pool cycles IPs across multiple users, and Telegram can correlate those IPs across accounts. The dedicated vs shared mobile IPs post walks through why this matters and how to verify whether your proxy provider is running a shared pool without disclosing it.

Setting up a proxy from scratch. If this post is your introduction to running Telegram through a proxy at all, the BYO number Telegram hosting piece covers the full setup path including how to connect your own phone number to a remotely hosted session without handing over your OTP or your number to any third party.

Why Singapore IPs work when others do not. The geolocation of your proxy IP affects more than just which country Telegram thinks you are in. Mobile carrier ASNs from Singapore carry a specific reputation profile that differs from datacenter ranges or Eastern European residential pools. The why Singapore mobile IPs post covers the technical and practical reasons this matters, especially if your own country’s IPs are on Telegram’s elevated-scrutiny list.

Evaluating proxy providers before you pay. The EFF’s work on connection privacy and the IETF SOCKS5 specification (RFC 1928) are useful references when you are reading a proxy provider’s technical claims. Most providers use the same language regardless of whether they are running a real SOCKS5 stack or just an HTTP tunnel with a misleading name. The test telegram proxy leak steps in this post will tell you faster than any marketing page.

final word

Running a test telegram proxy leak check takes less time than setting up the proxy in the first place. It is the only way to know with certainty that your configuration is doing what you think it is. If you are managing multiple accounts across multiple sessions and want to remove the variable of proxy configuration entirely, the telegramvault waitlist is open. One static Singapore SIM IP per account, no proxy layer to misconfigure, and Active Sessions that look the same every time you check.