Contacts under M
- Maghaberry Prison
- Magherafelt Careers Office
- Magherafelt Court
- Magherafelt Jobs & Benefits office
- Magilligan Prison
- Make the Call Service
- Maritime and Coastguard Agency
- Mater Hospital
- Maternity Allowance
- Matrimonial Office (Courts and Tribunals Service)
- MCA Belfast
- Mediation Northern Ireland
- Men's Action Network
- Men's Advisory Project (MAP)
- Mencap Northern Ireland
- Met Office
- MI5 (Security Service)
- Mid and East Antrim Borough Council
- Mid and East Antrim Borough Council Local Planning Office
- Mid and East Antrim District Registrar - Ballymena Registration office
- Mid and East Antrim District Registrar - Carrickfergus Registration office
- Mid and East Antrim District Registrar - Larne Registration office
- Mid Ulster District Council - Cookstown
- Mid Ulster District Council - Dungannon
- Mid Ulster District Council - Magherafelt Office
- Mid Ulster District Council Local Planning Office
- Mid Ulster District Registrar - Cookstown Registration office
- Mid Ulster District Registrar - Dungannon Registration office
- Mid Ulster District Registrar - Magherafelt Registration office
- Mid-Ulster Hospital
- Middletown Centre for Autism
- Migrant Help
- MindWise
- Miscarriage Association
- MLAs (Members of the Legislative Assembly)
- Modern Slavery Helpline
- Money and Pensions Service
- Money Helper
- Motor Neurone Disease Association NI
- MPs (Members of Parliament)
- MRCC Dublin
- MRCC Forth
- MRCC Liverpool
- Multiple Sclerosis Society Northern Ireland
- Muscular Dystrophy Campaign