| Word | Digits in Telephone Number |
|---|---|
| Isaiah | 472424 |
| Isatin | 472846 |
| Isatis | 472847 |
| Ischia | 472442 |
| Iseult | 473858 |
| Ishtar | 474827 |
| ISKCON | 475266 |
| Island | 475263 |
| Islets | 475387 |
| Isling | 475464 |
| Isobar | 476227 |
| Isogon | 476466 |
| Isohel | 476435 |
| Isolog | 476564 |
| Isomer | 476637 |
| Isopod | 476763 |
| Israel | 477235 |
| Isseis | 477347 |
| Issued | 477833 |
| Issuer | 477837 |
| Issues | 477837 |
| Isthmi | 478464 |
| Istles | 478537 |
| Isurus | 478787 |