State-run network
Free
Ohio DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.Full definition
Good to know: Free (no fee or payment step; ask [email protected] for a login)
All plans
| Plan | Price | Term |
|---|---|---|
| Access | Free (no fee or payment step; ask [email protected] for a login) |
Coverage
- Where it works
- State-run network for Ohio.
- Stations
- Not published; the public SourcetableThe list of every mount point a caster offers. Your app shows it when you connect without picking one.Full definition listed 7 mountpoints on Oct 17, 2026 (network products plus any single-station streams)
- Official coverage map
- Open map →
- Needs cell signal?
- Yes: NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition needs internet at the RoverThe receiver that moves around the job, like a survey pole or a drone. It uses the base's corrections to find its exact spot.Full definition (cell data or a phone hotspot). General rule, not an operator statement.
Connection settings
NTRIP caster
host156.63.133.115
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition2101
mountsODOT_VRS_CMRx, ODOT_VRS_ODOT_Ag, ODOT_VRS_RTCM3, ODOT_VRS_RTCM23, ODOT_VRS_CMR_PLUS, ODOT_G_R_E_C_RTX_CMRx, ODOT_G_R_E_C_RTX_RTCM3
Confirmed live: a public sourcetable request to 156.63.133.115:2101 answered on Oct 17, 2026 with 7 mountpoints.
- Correction formats
- RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition, CMRxTrimble's own compact correction format. Some networks offer it for Trimble gear and machine control.Full definition
- Satellites (ConstellationOne family of navigation satellites, like GPS, GLONASS, Galileo or BeiDou. More constellations means more satellites to use.Full definition)
- GPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.Full definition, GLONASS, Galileo, BeiDou
- 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?
- Yes for VRSVirtual reference station. The network blends nearby stations to create a pretend base right next to you, which keeps the baseline short.Full definition / network / nearest-base mountpoints (your rover must send its position as an NMEAA common text format GPS receivers use to report position and status. GGA is one NMEA message.Full definition GGA message). General rule based on the mount types.
Sign-up steps
- Email [email protected] to request a login
- Enter the host, port and Mount pointOne specific correction stream on a caster, like one channel on a radio. Each one comes from a certain station or network setup.Full definition in your rover
- Sign-up page
- Go to sign-up →
Fine print
- Support
- [email protected]
- Last checked
- Oct 17, 2026
Resolved Oct 16, 2026: ODOT's own network page lists no price, fee or payment step. To get a login you email the administrator at [email protected]. Dealers (E38, ArduSimple) also call it free. ODOT doesn't use the word 'free' itself. Non-Trimble receivers use the RTCM3 mount point ODOT_G_R_E_C_RTX_RTCM3 (per E38).
States covered1
Not listed by the operator: free trial, discounts, what's included, mountpoints and a few other details. Ask them before you sign up if these matter to you.
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