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The Coban GPS103 protocol

The protocol of the Coban TK103, GPS103 and their countless copies. One of the oldest still in the field: there are units installed over ten years ago still reporting with it.

It sends plain text, so it can be read directly. It is configured by SMS and almost always asks for a password, which usually ships unchanged.

Which port it comes in onOur server listens for the Coban GPS103 protocol on port 6001. 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 youAn unchanged factory password is a real security problem: anyone who knows the SIM number can reconfigure the device. Change it during installation.

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

CobanSee 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

Are the TK103 and the GPS103 the same thing?

They speak the same protocol, which is what matters for connecting them. They are among the oldest devices still in the field, and among the most copied: there are countless imitations that also speak GPS103.

I have had a TK103 installed for years — is it still any use?

The protocol is still handled. What you need to look at is something else: most of these devices date from the 2G era, and that network is being switched off country by country. Check which network yours works on before counting on it for another year.

Can I change my device's protocol?

No. The protocol comes from the factory; what you configure is which server and port it reports to.