H
- Halifax
- 1890866886 Call Instead – 0429310600
- Health and Safety Authority
- 1890289389 Call Instead – 016147000
- Hibernian Aviva
- Hibernian Direct 1890335577 Call Instead – 091525311
- Hibernian Health 1850717717 Call Instead - 0212434305
- Hibernian Insurance 1890332211 Call Instead - 091525311
- Higher Education Authority (HEA)
- 1890200637 Call Instead – 012317100
- Hoover / Candy Repair Centre
- 0818200021 Call Instead – 018529200
- Health Services Executive (HSE)
- Medical Card Applications 1890252919 Call Instead - 018647100, dial 0 for an operator
