C
- Calor Gas
- 1850812450 Call Instead – 014505000
- CarHireExcess.com
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- Central Statistics Office
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- Chill.ie (Customer Service)
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- Chorus / NTL – UPC (customer Care)
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- Citizens Information
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- Citylink
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- Colgate Dental Offer helpline
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- Collector General Limerick
- 1890203070 Call Instead – 061488000
- Comhar Linn Credit Union
- 1850277377 Call Instead – 018731101
- Commission for Energy Regulation
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- Commission for Taxi Regulation
- Consumers 1890606090 Call Instead – 016593800
- Industry 1890347347 Call Instead – 016593800
- ComReg
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- Curran Oil
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- Currys
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- Gullivers Retail Park, Northwood, Santry 1890400001 Call Instead – 018579500
- Liffey Valley 1890400001 Call Instead – 016261550
- Mahon Point Retail Park, Cork 1890400001 Call Instead – 0214615850
- Parkway Retail Park, Limerick 1890400001 Call Instead – 061431392
- The Park, Carrickmines 1890400001 Call Instead – 012920800
