An open NTRIP caster

We maintain an open NTRIP Caster for community use at:   port 2101

You do not need an account or a password to connect and use it; it is free.

Most public and private NTRIP Casters are “closed” in that you must first register with the owner/operator before your NTRIP client software can connect and get any data.  You can elect to run your copy of SNIP in either open or closed mode as well.

Contact the operator of any NTRIP Caster you wish to connect to in order to understand how to register on their network.  Some networks, or some streams within some networks, involve monetary compensation for the operators.

The caster is intended to support our user community throughout the world.  The data streams chosen represent a cross section of locations where we are developing other work.  In the caster holdings you can find baselines ranging from just over one meter to 50km and more, using both L1 and L2 and some low cost L1 only sources such as uBlox.  You can use these data products to confirm that your copies of SNIP or RTKLIB or other GNSS tools are working as expected. For example, you can easily connect to any two nearby local reference stations in our coverage area, as well as our worldwide broadcast ephemeris stream, and perform various types of RTK navigation operations on the data sets.

We also operate a free open NTRIP Caster at which any party can use to send their data to.  This allows those without a static IP, or if they do not want to operate their own Caster, to provide corrections to others (or themselves).  The Caster is one of a growing number of free open Caster services now on the market as the deployment of RTK style navigation grows.

Of course, your likely reason for reading this web page is to use SNIP to set up a network meeting your own needs.  Please download an evaluation copy and then see other articles in the knowledge base for details of how to go about this.

Download your own copy of SNIP today

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  1. We would like to create RTK network here in our country, so started learning with SNIP lite version. I want to setup a service same as, password: BETATEST

    so that my service will be password: xxxxxxx

    But unfortunately I don’t have a public/static IP in our office. Our main router is configured with static IP, but my public IP ( is different when I see at

    My pc local IP is

    How can I do this ? Any help will be of great help.


    1. support

      This relates more to internet issues than NTRIP or SNIP set up. But to point you in the right direction… Your ISP (whoever provided you with can provide you with a fixed static IP as well. But they will likely charge $$ for this. That is part one, and you can tell your friends to us that IP combined with the port you place SNIP on (2101 is common). Part two is to then assign a name for it, and you will need a DNS entry (an A record) which whoever setup “” can do for you. Adding a new A records is typically free. If you do not have domain name yet (i.e. needs to be created), get one from places like (there are many domain registries). Unless you decide to place the SNIP machine on the same machine that services the web site for, you might want to call you caster node and create an A record to that.

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