- IACP (Irish Association Counselling & Psychotherapy)
- 1890907265 – Call Instead 012723427
- ID Mobile Customer Care
- 1747 or 0897001747 – Call Instead 051349750
- IFA Member Services
- 1890924852 / 1890924851 – Call Instead 014265500
- Iarnrod Eireann Call Centre
- 1850366222 – Call Instead 018366222
- IKEA Dublin
- appliance repair calls only 1890987938 Call Instead – 016590276
- Customer Service 1890987938 – Call Instead 015413300
- Imagine Broadband / Wimax
- Residential Customer Care 1890929394 Call Instead – 014375000
- Residential Sales Enquiries 1890929292 Call Instead – 014375000
- Imagine WiMax Sales 1890929007 Call Instead – 014375000, and ask for the department you need.
- WiMax Customer Support 1890929008 Call Instead – 014375000, and ask for the department you need.
- Technical Support 1890929399 Call Instead – 014375000, and ask for the department you need.
- Pay A Bill 1890929395 Call Instead – 014375000, and ask for the department you need.
- Injuries Board
- 1890829121 – Call Instead 0238832826
- Insure.ie
- 1850434343 Call Instead – 012932300
- InsureMyVan.ie
- 0818288288 – Call instead 016606900, then Option 1
- InkJet.ie
- 1890665544 – Call Instead 04730933
- IRFU Rugby Ticket Helpline
- 0818717117 Call Instead – 014098319
- Irish Autism Action Helpline
- 1890818518 Call Instead – 0449331609 or 0449330709
- Irish Country Hotels
- 0818281281 – Call Instead 012958900
- Irish Farm Plastics – IFFPG
- 1890300444 Call Instead – 014089966
- Irish Heart Foundation
- 1890432787 – Call Instead 016685001
- Irish Rail
- WIFI (FleetConnect) 0818333388 – Call Instead 018991070
- Customer Service 1850366222 – Call Instead 018366222
- Ice Training Solutions
- 1890252599 – Call Instead 016763188
- Irish Ferries
- 0818300400 Call Instead – 016075700
- Irish Greyhound Board Sales Centre
- 1890269969 Call Instead – 061448080
- 1890623624 – Call Instead 018747662
- Irish Naturalisation and Immigration Service
- 1890551500 Call Instead – 016167700
- Irish State Savings
- 1850305060 – Call Instead 017058433
- Irish Times Delivery Service
- 0818464465 – Call Instead 016758007
- Irish Water
- Applications 1890448448 Call Instead – 017072824
- Customer Service 1890278278 Call Instead – 017072828
- (Sometimes incorrectly – I think – published as 1850278278 – Call Instead 017072828)
- itsforwomen.ie
- 1890886227 – Previous alternatives no longer active. Probably just as well, as you’ll likely be charged €10 for any administration carried out by telephone