| Word | Digits in Telephone Number |
|---|---|
| Hydrocarbons | 493 762-2726 (67) |
| Hydrocephaly | 493 762-3742 (59) |
| Hydrochloric | 493 762-4567 (42) |
| Hydrochoerus | 493 762-4637 (87) |
| Hydrocolloid | 493 762-6556 (43) |
| Hydrocortone | 493 762-6786 (63) |
| Hydrocracked | 493 762-7225 (33) |
| Hydrocracker | 493 762-7225 (37) |