NTRIP (Networked Transport of RTCM via Internet Protocol) gives surveyors centimeter-accurate GNSS positioning by streaming real-time corrections from a network of base stations. Most US states run their own free CORS network. Others rely on commercial providers or GEODNET.
Click any state below to reach its signup or login portal.
Find your state's NTRIP access
Tap any state to reach its RTK / CORS network signup or login portal.
States without a unified public network link to GEODNET, a nationwide RTK service. Links independently verified — if you find a broken one, let us know.
States without a unified public CORS network fall back to GEODNET — a nationwide subscription RTK service. All links are independently verified and updated regularly. If you find a broken link, let us know via the Help widget.
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