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The Queclink GL200 protocol

The protocol of Queclink devices, mid-to-high range. It is called «@Track» and the GL200 is the model that gave it its name.

It runs as text and is configured by SMS or remotely, with commands that are quite readable compared to a binary device.

Which port it comes in onOur server listens for the Queclink GL200 protocol on port 6004. That is the port you set on the device, together with the server address. Point it somewhere else and the data still leaves, but the server cannot read it.
Careful with what other sites tell youQueclink also makes modems, so here the confusion between the modem's TAC and the device's TAC is especially easy.

Build the configuration command

We do not have this protocol's commands yetWe would rather tell you than make them up. We only publish the ones we have checked against the manufacturer's manual or against a real device. If you have them confirmed, send them to us and we will add them.
Send us the commands

Devices that use it

QueclinkSee this brand's devices

Receive this protocol on your own platform

No server to set up and nothing to program: the platform already reads this protocol. You add the brand and the domain.

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Back to the lookup

IMEI lookupDevice identification tool. We do not perform unlocking, carrier release or mobile blacklist checks, and we are not affiliated with the GSMA.

Where the data comes fromPublic mobile TAC database (MIT licence, Copyright (c) 2026 Moaz Ebrahem), TAC codes published by Teltonika on its official wiki, and the protocol observed on devices connected to the Appogio platform. We publish no full IMEI and no customer data.

Frequently asked questions

Which devices use the Queclink GL200 protocol?

Queclink's, a Chinese manufacturer based in Shanghai. Its product families look very much alike, and the difference between two part numbers may be exactly the input you need: ask for the exact model in writing.

Why do you see so much Queclink in large fleets?

Reliability. It is the install-it-and-forget-it brand, and in operations where going back to a vehicle costs a whole day that counts for more than the price of the device.

Can I change my device's protocol?

No. What you configure is which server and port it reports to, not the language it speaks.