| Iceland | Pythia.Services.Time, Pythia |
| id | Pythia.Prelude |
| Indian__Antananarivo | Pythia.Services.Time, Pythia |
| Indian__Chagos | Pythia.Services.Time, Pythia |
| Indian__Christmas | Pythia.Services.Time, Pythia |
| Indian__Cocos | Pythia.Services.Time, Pythia |
| Indian__Comoro | Pythia.Services.Time, Pythia |
| Indian__Kerguelen | Pythia.Services.Time, Pythia |
| Indian__Mahe | Pythia.Services.Time, Pythia |
| Indian__Maldives | Pythia.Services.Time, Pythia |
| Indian__Mauritius | Pythia.Services.Time, Pythia |
| Indian__Mayotte | Pythia.Services.Time, Pythia |
| Indian__Reunion | Pythia.Services.Time, Pythia |
| Int | Pythia.Prelude |
| Integer | Pythia.Prelude |
| InternalPercentage | Pythia.Data.Percentage.Internal |
| IO | Pythia.Prelude |
| IpAddress | Pythia.Services.Types.Network, Pythia.Services.GlobalIp, Pythia.Services.NetInterface, Pythia |
| IpAddresses | Pythia.Services.Types.Network |
| IpParseError | Pythia.Services.NetInterface.Ip |
| IpRefinement | Pythia.Services.Types.Network |
| IpType | Pythia.Services.Types.Network, Pythia.Services.GlobalIp, Pythia.Services.NetInterface, Pythia |
| Ipv4 | Pythia.Services.Types.Network, Pythia.Services.GlobalIp, Pythia.Services.NetInterface, Pythia |
| Ipv4Refinement | Pythia.Services.Types.Network |
| Ipv6 | Pythia.Services.Types.Network, Pythia.Services.GlobalIp, Pythia.Services.NetInterface, Pythia |
| Ipv6Refinement | Pythia.Services.Types.Network |
| Iran | Pythia.Services.Time, Pythia |
| Iso | Pythia.Prelude |
| iso | Pythia.Prelude |
| Iso' | Pythia.Prelude |
| Israel | Pythia.Services.Time, Pythia |
| IsString | Pythia.Prelude |