| GB4IMD | Cornwall, UK (Organisers) |
| GB4LD | Lizard Wireless Station, Bass Point, Cornwall, UK |
| IY1SP | La Spezia – Museo Tecnico Navale |
| IY5PIS | Coltano (PI) |
| IY1MR | Rapallo (GE) |
| IY1SM | Santa Margherita Ligure (GE) |
| IY0ORP | Osservatorio Geofisico di Rocca di Papa (RM) |
| IY0TC | Torre Chiaruccia – Santa Marinella (RM) |
| IY0CG | Castel Gandolfo (RM) |
| IY0GA | Capo Figari – Golfo Aranci (SS) – Sardinia Island |
| IY0IMD | Forte Michelangelo – Civitavecchia (RM) |
| IY4FGM | Villa Griffone – Pontecchio Marconi (BO) |
| IY6GM | Monte Cappuccini (AN) |
| IY7M | Molo San Cataldo (BA) |
| IY1TO | “Gino Lisa” Mirafiori (Turin) |
| GB8MD | Telford & District ARS, Gwynedd, Wales |
| EI3IMD | Coastguard Station, Tramore, Ireland |
| K3IMD | Hartstown, Pennsylvania, USA |
| WA3BAT | Philadelphia Museum Ship, Philadelphia, USA |
| KM1CC | Cape Cod RC, USA |
| GB2GM | Poldhu ARC, Cornwall, UK |
| GB2NH | Tidemills Marconi Site, East Sussex, UK |
| GB2MCW | Tidemills Marconi Site, East Sussex, UK |
| OE23M | ORF Centre, Vienna, Austria |
| K2M | Marconi Tower, Binghamton, NY, USA |
| EI0MAR | Martello Tower, Dublin |
| W1WCC | Chatham, Massachusetts, Cape Cod, USA |
| GB5LSG | Lochboisdale, Isle Of South Uist, Outer Hebrides, Scotland |
| GB0CMS | Caister Marconi Station, Life Boat Station, Norfolk, UK |
| VK2IMD | Hornsby & District ARC, Hornsby, NSW, Australia |
| DA0IMD | Borkum Island, Germany |
| VP8VPC | Stanley, Falkland Islands |
| PA23IMD | Gouda & District Section Veron, Netherlands |
| GB0IMD | Weston Super Mare, UK |
| HV1CN | Vatican Radio , Vatican City |
| W1AA | Marion (Mass, USA) Marconi Transmitter Building site |
| W2RC | Radio Central ARC, Rocky Point, New York |
| IY0MMR | Forte Monte Mario (Roma) |
| GB4MPC | Marconi Point, Cullercoats, UK |
| GB4MDI | Barry ARS, Lavernock Point, South Wales |
| G2NM | Amberley Museum ARC, West Sussex, UK |
| G2LO | Borough Hill, Daventry, UK |
| W2M | Babylon, New York, USA |
| GB0MAR | The Needles, Marconi Monument, Isle Of Wight |
| GB6IMD | The Marconi Memorial, Ballycastle, Northern Ireland |
| GB5LT | Luttrells Tower, Hampshire, UK |
| GX0MWT | Chelmsford ARS, Essex, UK |
| K3S | Nuclear Ship Savannah, Baltimore, USA |
| DL0BRF | Light Vessel Borkumriff, Borkum Island, Germany |
| GB0MBP | Marconi Bass Point, The Lizard, Cornwall, UK |
| 9H1MRC | Marconi Amateur Radio Circle, Malta |
| GB1GLC | Marconi’s Carnarvon Station, North Wales |
| IY7GMB | Circolo ARS, Bari |
| K6KPH | Maritime Radio Historical Society, California, USA |
| W2RTM | New Jersey Antique Radio Club, New Jersey, USA |
| GB4MHS | Museum of History & Science, Oxford, UK |
| VO1IMD | Signal Hill, Newfoundland, Canada |
| GB2IMD | Dragon Amateur Radio Club, Wales |
| EI4IMD | Corrywongaun. Co. Galway, Ireland |
| M3KXZ/P | Tide Mills, East Sussex, UK |
| GB100TMD | Telford & District ARS, Gwynedd, Wales (Tywyn Marconi Day) |
| CW1GM | Radiogrupo Sur, Uruguay |
| GB0MPB | Marconi Portland Bill, Portland, Dorset, UK |
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