GDS codes
| City | Starhotels | Trust | Galileo | Amadeus | Worldspan | Sabre |
| New York | The Michelangelo | - | PH42286 | PHNYCMIC | PH20198 | PH33245 |
| Paris | Castille Paris | HWPAR05 | PH23692 | PHPARCPH | PHPARCP | PH011841 |
| Bergamo | Cristallo Palace | HWBGY15 | SY22286 | SYBGYSTA | SY14081 | SY022446 |
| Bologna | Excelsior | HWBLQ06 | SY17793 | SYBLQMIL | SY3825 | SY011476 |
| Florence | Michelangelo | HWFLR02 | SY21988 | SYFLRMIC | SY2969 | SY011473 |
| Florence | Tuscany | HWFLR01 | SY21989 | SYFLRMRO | SY2970 | SY011475 |
| Florence | Vespucci | HWVCE17 | SY04648 | SYFLRSTA | SY40593 | SY045841 |
| Genoa | President | HWGOA13 | SY31810 | SYGOASTA | SY14718 | SY028006 |
| Milan | Anderson | HWMIL18 | SY83029 | SYMILAND | SY25935 | SY037586 |
| Milan | Business Palace | HWMIL19 | SY77742 | SYMILBUS | SY25581 | SY024745 |
| Milan | Ritz | HWMIL12 | SY18626 | SYMILNAS | SY1448 | SY015109 |
| Milan | Rosa Grand | HWMIL05 | SY17653 | SYMILROS | SY3555 | SY011478 |
| Milan | Splendido | HWMIL04 | SY17656 | SYMILSPL | SY2886 | SY011474 |
| Milan | Tourist | HWMIL3 | SY22268 | SYMILSTA | SY14383 | SY023733 |
| Naples | Terminus | HWNAP21 | SY72108 | SYNAPTER | SY40833 | SY022402 |
| Parma | Du Parc | HWPMF22 | SY92675 | SYPMFGRA | SY14303 | SY023476 |
| Rome | Metropole | HWROM08 | SY17782 | SYROMMET | SY4099 | SY011479 |
| Rome | Michelangelo | HWROM20 | SY08117 | SYROMSMO | SY40677 | SY007346 |
| Saronno | Grand Milan | HWMIL24 | SY49460 | SYMILGRA | SYMIL24 | SY048311 |
| Turin | Majestic | HWTRN09 | SY22074 | SYTRNMAJ | SY8474 | SY011790 |
| Trieste | Savoia Excelsior | HWTRS11 | SY05340 | SYTRSSAV | SY4262 | SY008385 |
| Venice | Splendid Venice | HWVCE10 | SY05338 | SYVCESPL | SY4260 | SY012957 |