| GB4IMD | Cornwall, UK (Organisers) |
| GB4LD | Lizard Wireless Station, Bass Point, Cornwall, UK |
| GB0IMD | Weston Super Mare, UK |
| IY4FGM | Villa Griffone – Pontecchio Marconi (BO) |
| IY1SP | La Spezia, Museo Tecnico Navale |
| IY7M | Molo San Cataldo (BA) |
| IY6GM | Monte Cappuccini (AN) |
| IY5PIS | Coltano (PI) |
| IY1MR | Rapallo (GE) |
| IY1SM | Santa Margherita Ligure (GE) |
| IY0ORP | Osservatorio Geofisico di Rocca di Papa (RM) |
| IY0GA | Capo Figari – Golfo Aranci (SS) – Sardinia Island |
| IY0TC | Torre Chiaruccia – Santa Marinella (RM) |
| IY0IMD | Forte Michelangelo – Civitavecchia (RM) |
| IY0M | Santa Marinella, Rome |
| IY1TO | Gino Lisa – Mirafiori (Torino) |
| IY0MMR | Forte Monte Mario, Roma |
| IY0CG | Castel Gandolfo (Rome) |
| OE26M | ORF Centre, Vienna, Austria |
| G2NM | Amberley Museum ARC, West Sussex, UK |
| W1AA | Marion (Mass, USA) Marconi Transmitter Building site |
| GB8MD | Telford & District ARS, Gwynedd, Wales |
| EI1K | Ballybunion, Co. Kerry, Ireland |
| GB8DW | Maison Dieu, Dover, UK |
| VO1IMD | Signal Hill, Newfoundland, Canada |
| PA6IMD | Gouda & District Section Veron, Netherlands |
| KM1CC | Marconi Cape Cod RC, Marconi Wireless Station Site, Wellfleet, MA USA |
| VP8VPC | Stanley, Falkland Islands |
| GB2GM | Poldhu ARC, Cornwall, UK |
| GB0CMS | Caister Marconi Station, Life Boat Station, Norfolk, UK |
| VK2IMD | Hornsby & District ARC, Hornsby, NSW, Australia |
| GB2MRS | Mid-Somerset ARC, Somerton, Somerset, UK |
| TM8DW | Marconi Site, Wimereux beach, North France |
| W2RTM | New Jersey Antique Radio Club, New Jersey, USA |
| GB2SFL | The Marconi Hut, Maison Dieu, Dover, UK |
| GB2DOVER | Maison Dieu, Dover, UK |
| AO7IMD | Cadiz, Spain |
