RTK networks
11,915 streams · 5,690 ≈ stations · 122 networks · 169 countries
A public map and directory of RTK casters and stations from open sourcetables. Run your own caster? Add it and manage it on Fixcast.
Updated: 2026-07-08· 92 d· Directory data may be out of date — a refresh is planned.
Pick your GNSS receiver and see whether it suits the public correction streams in the directory. A pre-connection estimate from advertised sourcetable data — the Fixcast app gives the exact verdict from the decoded stream once connected.
Pick your receiver
Capabilities of common RTK receivers from datasheets. Indicative, refined from community data.
| Receiver | RTCM 3 | MSM | Constellations | SSR / state-space | VRS (sends GGA) |
|---|---|---|---|---|---|
| Other / receiver not listed | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Emlid Reach RS3 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Emlid Reach RS2+ | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Emlid Reach RS2 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Emlid Reach RX | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Emlid Reach RS+ | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Trimble R12i | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Trimble R12 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Trimble R10 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Trimble R8s | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Trimble R2 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Trimble DA2 (Catalyst) | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Leica GS18 T | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Leica GS18 I | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Leica GS07 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Topcon HiPer VR | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Topcon HiPer HR | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| CHCNav i93 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| CHCNav i89 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| CHCNav i73 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Stonex S900A | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Stonex S850A | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Stonex S9i | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| u-blox ZED-F9P | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Septentrio Mosaic-X5 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✓ | ✓ |
| Septentrio AsteRx-m3 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✓ | ✓ |
| Spectra SP85 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Spectra SP60 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Sokkia GRX3 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| South Galaxy G1 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| South Galaxy G6 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Hi-Target V90 Plus | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| Hi-Target iRTK5 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| GeoMax Zenith60 | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
| SingularXYZ X1 Pro | ✓ | MSM 7 | GPS · GLO · GAL · BDS · QZSS · SBAS | ✕ | ✓ |
What compatibility depends on
MSM vs. legacy
Modern streams carry observables in the MSM format (messages 1071–1127). Very old receivers only do “legacy” (1004/1012). An MSM-only stream won’t work on a legacy-only receiver.
SSR vs. OSR
Standard RTK correction is OSR (observation-space). SSR (state-space, PPP-RTK) needs a receiver that can process it — otherwise the stream is unusable.
VRS / network mounts
Network (VRS) mounts generate a correction for your location — the receiver must send its position via a GGA message. Almost all can.
Constellations
A stream carries corrections for certain constellations (GPS, GLONASS, Galileo, BeiDou…). If your device doesn’t track one, it loses those satellites but usually still gets a fix.
The estimate is based on data advertised in the sourcetable, which may not match the stream’s actual content. The exact verdict (MSM level, SSR, satellites, station identity) is determined by the Fixcast app from the decoded stream once connected.