Regional networks / Caltrans RTNReal-time network. A group of base stations spread across an area that work together to send RTK corrections.Full definition (District 6 and others)
Caltrans RTNs (District 6 and others)
Restricted
Restricted (state DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.Full definition)
Price not published
Caltrans
Good to know: Not available to the public
Where it works
1 stateCaltrans districts; not open to the public
All plans
| Plan | Price | Term |
|---|---|---|
| Partner access | Not published |
- Free trial
- Not published (restricted network, not open to the public)
- Discounts / exemptions
- Not published (restricted network, not open to the public)
- What's included
- Not published (restricted network, not open to the public)
Coverage
- Where it works
- Caltrans districts; not open to the public
- Stations
- Not published (restricted network, not open to the public)
- Needs cell signal?
- Not available to the public
Connection settings
NTRIP caster
hostNot published (restricted network)
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition—
- Mount types
- Not published (restricted network, not open to the public)
- Correction formats
- Not published (restricted network, not open to the public)
- Satellites (ConstellationOne family of navigation satellites, like GPS, GLONASS, Galileo or BeiDou. More constellations means more satellites to use.Full definition)
- Not published (restricted network, not open to the public)
- Datum / EpochOne moment of GPS measurement. A receiver logging at 1 Hz records one epoch every second.Full definition / GeoidA lumpy, imaginary "sea level" surface around the whole Earth. Elevations are measured from it.Full definition
- Not published (restricted network, not open to the public)
- Must send GGAA short message your rover sends with its rough location. VRS and nearest-station streams need it to know where you are.Full definition position?
- Not published (restricted network, not open to the public)
- Accuracy
- Not published (restricted network, not open to the public)
- Receivers that work
- Not published (restricted network, not open to the public)
Sign-up steps
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- How long approval takes
- Not published (restricted network, not open to the public)
- Who can sign up
- Vetted public partners only, under data-sharing agreements (e.g. UNAVCO, CSRC, SOPAC, local cities/counties)
Fine print
- Terms / user agreement
- Not published (restricted network, not open to the public)
- Support
- Not published (restricted network, not open to the public)
- Last checked
- Oct 17, 2026
Shared only with vetted public partners under data-sharing agreements. Public users: see CRTN instead.
States covered1
Not listed by the operator: a coverage map, a sign-up page, a status page. Ask them before you sign up if these matter to you.
No user reliability reports yet. Used it in the field? Tell us how it went.