| País | Italia |
| ITU/UIT | I |
| Fecha entrada | 1866-01-01 |
| Prefijos | |
| IAA-IAZ | |
| IBA-IBZ | |
| ICA-ICZ | |
| IDA-IDZ | |
| IEA-IEZ | |
| IFA-IFZ | |
| IGA-IGZ | |
| IHA-IHZ | |
| IIA-IIZ | |
| IJA-IJZ | |
| IKA-IKZ | |
| ILA-ILZ | |
| IMA-IMZ | |
| INA-INZ | |
| IOA-IOZ | |
| IPA-IPZ | |
| IQA-IQZ | |
| IRA-IRZ | |
| ISA-ISZ | |
| ITA-ITZ | |
| IUA-IUZ | |
| IVA-IVZ | |
| IWA-IWZ | |
| IXA-IXZ | |
| IYA-IYZ | |
| IZA-IZZ |
