Find RTK dorrections where you work

RTKRTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition makes GPSGPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.Full definition accurate to about an inch. Type your state, ZIP or address to see the free and paid correction services there, with prices and setup details.

23 states have a free network for everyone. Tap a state for its options.

Free option (23)Paid only (27)

Working near a state line? Check your exact spot

Nationwide services use one login everywhere you have cell signal. Prices are the lowest each operator publishes, per roverRoverThe 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.

The label shows the best access you can get there: Free means a free network exists.

Pick a network to see the states on its published list. Services that don't publish a list are marked, and we don't guess for them.

Regional / private

KeyNetGPSAllTerra Central RTKNetTURN GPS (Utah network)Trimble VRS Now (mapped states)Seiler Nebraska Trimble NetworkREIL-Net RTK NetworkFrontier VRSRural Tower NetworkiNET Reference Station NetworkMyWay RTKGreenMark Equipment RTK NetworkKeating Tractor RTK NetworkTrimble VRS Now (Hawaii)Alpha RTKAZGPS GNSS NetworkGeoShack GeoNet RTKCaltrans RTNs (District 6 and others)PennDOT RTNKDOT GNSS Network (Pivot)Centipede RTK

State-run

State-run networks

Nationwide (dashed = no state list published)

Point One Navigation PolarisGEODNET RTKRTKdataE38 RTK PremiumEmlid Correctionsu-blox PointPerfect FlexSwift Navigation SkylarkLeica (HxGN) SmartNetTrimble VRS NowTopcon Topnet LiveCarlson SkyNet RTNRTK2GONOAA NGS CORSOnocoyEarthScope NOTA real-time streamsEmlid CasterTrimble CenterPoint RTXTrimble CatalystNovAtel TerraStarJohn Deere RTKCase IH AFS RTK+New Holland PLM RTK+IGS real-time streams (IGS-IP / BKG)

Regional and private networks20Networks run by companies, equipment dealers or volunteers that cover a few states.

$375 per 30-day subscription; yearly from $3,135 (net 30) or $275/mo ($3,300/yr)

States: VA, DC, MD, DE, PA, NJ, NY, CT, RI, MA, VT, NH, ME

$600/yr per subscription (covers TURN + Nevada GPS)

Not published (buy through Trimble dealers or the Trimble store)

States: AL, CO, FL, GA, IA, IL, IN, KY, MN, MS, ND, NE, NM, OR, SD

Not published (fee based; contact Seiler)

Single base free; network corrections fee based

Not published (yearly, monthly and short-term plans; site licenses for multiple machines)

Station owners pay $1,500/yr per station; rover pricing through local partner

States: IN, OH, NY, MI, ID, WI, IL, NE, KS, OR, ND, IA

$1,250/yr first unit, $1,100 second, $900 each additional; 20% off with 3+ subscriptions

$3,000 startup network fee + $300/yr per receiver

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

Virtual RTK $350/yr or $40/mo per license (about 4 in; contiguous US only); True RTK $750/yr or $85/mo per license (about 0.4-1.2 in)

$40/mo, $400/yr, or $1,920 for 5 yrs per device

From $100 (shortest term; see page for durations)

1 yr included with eligible Reach receivers; top-up $699/1 yr or $1,199/3 yr per device (via E38)

From $5.90/mo (up to 100 hrs); 30-day free trial

From $69/mo (0.4 in RTK) or $29/mo (under-4-inch RTK-SSR) per ArduSimple

$1,800 new US subscription (Topcon store); monthly/project terms via dealers

US network, 200 stations added Jan 2025; works with any network rover

US nationwide, single NTRIP mount point, 1,700+ bases

Free community caster; no quality guarantees

Free post-processing data (RINEX); not a real-time RTK service

Community-built global network; pay per hour

Free for non-commercial use; commercial license required

Science-grade stations (NOTA); pick a station near you

Not a network: sends YOUR base's corrections to your rover over the internet

Satellite PPP; works without cell signal; Trimble receivers

Subscription GNSS for phones/tablets with the DA2 antenna

Satellite PPP (also sold as Leica SmartLink and by Ag Leader)

Not published (dealer); forum reports ~$1,250-$1,500/machine/yr

Ag: cellular RTK for Case IH AFS receivers

Ag: cellular RTK to a tractor modem, about 0.6 in

Science streams: raw global stations and real-time PPP orbit/clock corrections; not a plug-and-play RTK service