- 3 Ireland
- An Post
- Dublin postal districts
- General Post Office
- List of people on stamps of Ireland
- Postage stamps of Ireland
- Definitive postage stamps of Ireland
- Postal addresses in Ireland
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- Broadcasting Commission of Ireland
- BT Ireland
- Chorus Communications
- Commission for Communications Regulation
- Communications in Ireland
- Eircom
- HEAnet
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- Irish Broadband
- IE Domain Registry
- Indigo Internet
- Internet Neutral Exchange
- Ireland On-Line
- Ireland Offline
- ITnet
- Meteor (mobile network)
- O2 Ireland
- Telecom Éireann
- Vodafone Ireland
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