Price & coverage change log

Enter how many days a month you're in the field (or tick Every day). We pick the cheapest of each service's day passPay-as-you-go / day passYou pay only for the days (or hours) you actually use the service instead of a monthly or yearly subscription. Cheaper if you only work in the field a few days a month.Full definition, hourly, monthly or yearly plan and tell you which one and why. eGPS Georgia ($50/day, capped at $400/mo) and AZGPS ($50/day) day passes are included.

We asked each public casterCasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.Full definition for its mountpointMount 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 list (no login used). 48 answered, so their host and portPortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition are confirmed working on Oct 17, 2026. Each provider page now says so.

Added confirmed host, port and mountpoints for FPRN, INCORS, NC RTNRTNReal-time network. A group of base stations spread across an area that work together to send RTK corrections.Full definition, SC RTN, NYSNet and WISCORS.

SmartNet state hosts (port 9301 survey, 9201 mapping), KeyNet, AllTerra rtknet, E38 RTKRTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition Premium and TerraStar internet delivery.

Free for non-commercial use; commercial is $1,000 per seat per year (one seat = one real-time stream).

One free account plus a $100 fee, $1,000/yr contributor, $20,000 consortium and $150,000 statewide tiers.

New Holland's dealer RTK+ (ag) and the free IGS science streams are now listed.

Georgia, Alpha RTK, AZGPS, MyWay, TopNET Live, New Holland, Carlson SkyNet and Case IH say 'Provided after signup' instead of a guess.

Pick states or a whole region. See one subscription that covers them all and the cheapest mix of free state networks plus paid services, per year for your roversRoverThe 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.

Community network. $20 per 30 days plus $0.15/hour. Caster clients.onocoy.com:2101, mount NRBY_ADV.

Free for non-commercial use. ntrip.earthscope.org:2101, RTCM 3RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition.3 MSM7 per station.

Free relay for your own base: up to 5 bases and 10 rovers.

Satellite PPP, 2 cm H / 3 cm V. US dealer price $1,150/yr.

Dealer listing $455/mo per user; DA2 antenna sold separately.

TerraStar-L / C PRO / X. Price not published.

Dealer service. Price not published; forum reports only.

Dealer listing $838.10 for 1 year.

Private Mid-Atlantic network. $995/yr; monthly price conflicts ($195 vs $295).

$50/day, $300/mo, $2,000/yr; 7-day free trial.

TX metros and Shreveport. Price not published.

Partners only. Public users should use CRTN.

Internal only per PennDOT Pub 122.

Authorized users via KDOT Form 0519.

TDOTCORS.TN.GOV:8002; MSM_iMAX / MSM_VRS / MSM_NEAR.

$1,900 for 1 login up to $20,000 for 40. Port 8080.

Trans 58: $300/yr or $50/mo; FAQ calls the fee 'previously proposed'.

9879 single base, 9881 GPSGPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.Full definition network, 9882 GNSSGNSSGlobal Navigation Satellite System. The general name for GPS (USA) and the other satellite systems like GLONASS, Galileo and BeiDou.Full definition network.

RTN.USM.EDU:2101, VRS_GNSS_RTCM34_NAD83.

Caster, mountpoints, datumDatumThe starting point and ruler that coordinates are measured from. The same spot has different numbers in different datums.Full definition and sign-up steps added from operator documents.

Ports, mountpoints and datums from operator docs.

Sections: price and plans, coverage, connection settings, sign-up steps, fine print.

ODOT's network page shows no fee or payment step; logins come from [email protected]. Caster 156.63.133.115:2101 added.

From Montana State Library budget documents (2024 and March 2026). Was 'not published'.

510 stations. 15 states have 5+ stations (was 6 documented states).

Operator claims all 50 states (1,500+ stations) but publishes no state list; linked its full-screen map.

UT 165.239.144.5:2101; NV 165.239.144.7:2101 (or 168.179.231.11:2102 HARN), from Utah UGRC.

First published snapshot of every state, regional and nationwide option and their list prices. Future price and coverage changes are logged against this baseline.

Trimble VRS network from VA to ME. 30-day $375; yearly $3,135 net 30 or $275/mo.

$100 one-time registration contribution for one account; extra connections via $1,000/yr membership.

$300/yr or $50/mo per user for private users; free for WI government, higher-ed, federal and tribal users.

Volume tiers up to 40 logins for $20,000; one-time 90-day free test account.

Free regional state network (Southcentral, Interior, Southeast).

iNET (Southeast), MyWay RTK, GreenMark, Keating Tractor, Trimble VRS Now Hawaii, Topcon Topnet Live ($1,800/yr), Carlson SkyNet ($1,500/yr).

Coverage maps, plan tables, caster details, formats and datums pulled from operator pages.