Callsigns starting with 4S
| Callsign | Last heard | Comment |
|---|---|---|
| 4S5CNH | 2m37s ago | 4S5CNH's QTH |
| 4S5SC | 2m11s ago | 4S5SC's QTH |
| 4S6AWA | 3s ago | 4S6AWA's QTH |
| 4S6CPT | 1m8s ago | CPT's QTH |
| 4S6DRJ-13 | 58s ago | GW2000C MaxGust:13.7mph UVI:0 GWtoAPRS |
| 4S6JNT-1 | 1d2h ago | |
| 4S6MKM | 1m13s ago | 4S6MKM's QTH |
| 4S6NDB | 4m3s ago | Nilantha Resident |
| 4S6RVD | 1m29s ago | Ravindu Balasooriya's QTH |
| 4S6TAM | 1m55s ago | Manoj's QTH |
| 4S6TKA | 1m34s ago | 4S6TKA's QTH |
| 4S6TKA-1 | 1d15h ago | LoRa iGate 4S6TKA |
| 4S6TMP | 3m17s ago | OM Tharanga ALT 100m |
| 4S6TWO | 2m33s ago | Binara's QTH |
| 4S6VNN | 2m59s ago | Varuna’s QTH |
| 4S6YTM | 10s ago | 4S6YTM's QTH |
| 4S7DSB | 4m24s ago | 4S7DSB's QTH |
| 4S7GGA | 52s ago | Sri Lanka Girl Guides Association |
| 4S7JL-4 | 3m38s ago | Jaliya's QTH |
| 4S7LEO | 2m56s ago | Rajadhahana - LEO's Den |
| 4S7MD | 1m50s ago | Senevi's QTH |
| 4S7NDR | 46s ago | 4S7NDR's QTH - Available on 144.440 MHz |
| 4S7RCS-1 | 25s ago | ARCSN Lora iGate - www.arcsn.lk |
| 4S7RCS-R1 | 4m21s ago | ARCSN Padukka RPTR | 145.675 / -600 MHz |
| 4S7RCS-R2 | 3m59s ago | ARCSN Gammaduwa RPTR | 145.150 / +600 MHz |
| 4S7RO | 31s ago | 4S7RO's QTH |
| 4S7RS | 47s ago | RSSL Club Shack |
| 4S7RS-R1 | 25s ago | RSSL Yatiyanthota RPTR | 145.625 / -600 MHz | Daily Net @1530UTC | 4S7RS-R Echolink |
| 4S7RS-R2 | 3s ago | RSSL Piduruthalagala RPTR | 145.650 / -600 MHz | Daily Net @1530UTC | 4S7RS-R Echolink |
| 4S7RS-R3 | 4m42s ago | RSSL Deniyaya RPTR | 145.600 / -600 MHz |
| 4S7SA | 4m45s ago | 4S7SA's QTH |
| 4S7SE | 3m41s ago | DSSC Scouts |
| 4S7SKR | 2m16s ago | 4S7SKR-Mario |
| 4S7UV | 3m20s ago | 4S7UV's QTH |
| 4S7VJ | 25s ago | 4S7VJ's QTH |
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