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| Dublin | 20-20 Software, A1:Unit 1D Three Rock Road | |
| 20:20 Mobile , A1:77 Furze Road | |
| A & O Systems Services Ltd., A1:88/89 Furze Road | |
| Abcon Ltd., A1:Unit 63A Heather Road | |
| Ace Tyres & Exhausts , A1:42 Heather Road | |
| Acumen & Trust, A1:Suite B4/B5 The Avenue | |
| Adecco, A1:Unit 3 Sandyford Office Park | |
| Adidas, A1:Unit 14, Elm House | |
| Advanced Field Solutions, A1:Unit 5 | |
| Advanced Radiology, A1:Suite A8 The Avenue | |
| Agar Estates, A1:Suite A1 The Avenue | |
| Agcert International, A1:Unit C Ground Floor | |
| Agilent Technology, A1:Unit 2 Ground Floor | |
| AGL Consulting, A1:Suite B2 The Avenue | |
| AIB, A1:Sandyford Business Centre | |
| AIB Bill Printing, A1:Unit 17C Holly Avenue | |
| AIB Commercial Services Ltd., A1:Unit 1A Sandyford Business Centre | |
| AIB Finance & Leasing, A1:Block L0 | |
| AIB Stationary, A1:Unit 17B Holly Avenue | |
| Air Speed, A1:Unit 11 Sandyford Office Park | |
| Airtricity, A1:Raven's Rock Court | |
| Airvod Ltd., A1:Heather House | |
| Alburn, A1:Alburn House | |
| Allard Ryan Consulting Ltd., A1:Suite A34 The Mall | |
| Allen Maguire & Leo Lynch, A1:Unit A Penthouse | |
| Allfinanz, A1:Unit 3 | |
| Alliance Unichem, A1:Suite A25 The Avenue | |
| Allied Irish Windscreen, A1:Unit 67D Heather Road | |
| Allied Pension Trustee, A1:Unit A 1st Floor | |
| Allsopp Parker March Ltd., A1:Suite A22 The Avenue | |
| Alma Engineering Supplies Ltd., A1:Unit 31 Ravens Rock Road | |
| Alpack Packaging, A1:Unit 1B Three Rock Road | |
| Alphyra House, A1:Heather Road | |
| Alu Nova, A1:Unit 66E Heather Road | |
| Ambrose Glass Motors, A1:Unit 29 Spruce Avenue | |
| American Airlines, A1:Fenward House | |
| Amory's Solicitors, A1:Suite A10 The Avenue | |
| Amt Sybex Computing, A1:Unit 13, Elm House | |
| Amt-Sybex, A1:Oak House | |
| An Post, A1:Unit 96 | |
| Appleyard Motors Ltd., A1:Unit T15/16 Maple Avenue | |
| Arachas, A1:Unit 1/9/10 The Courtyard | |
| Archaeology, A1:Unit 5 Block A3 | |
| Archway Global Associates Ltd., A1:Unit 2 Sandyford Park | |
| Arnold, A1:Unit 13 Sandyford Office Park | |
| Ashfield Healthcare, A1:Unit B 1st Floor | |
| Aspect Systems Ltd., A1:Unit 24 Spruce Avenue | |
| Assurance Advisers Ltd., A1:Unit 22 Sandyford Office Park | |
| Atlantic Home Care Ltd., A1:Unit 4-6 Holly Avenue | |
| Atron Electronics, A1:Unit 18 Sandyford Office Park | |
| Auto Trader , A1:Paramount Court | |
| Automotive Team, A1:86/87 Furze Road | |
| Avaya, A1:Block A, Atrium Building | |
| Avcom, A1:Unit B Three Rock Road | |
| Avid Technology, A1:Carmanhall Road | |
| Avtex, A1:Unit 61F Heather Road | |
| Axiom Design, A1:Block C, The Forum | |
| B.J.Fitzpatrick & Co. Ltd., A1:Grafton House | |
| Bacchus, A1:Unit T28 Rowan Avenue | |
| Balcombes, A1:Unit 16 Sandyford Office Park | |
| Bank of Ireland, A1:Ballymoss House | |
| Bank of Ireland , A1:Unit B, Ground Floor | |
| Barclay Card, A1:Ballymoss House | |
| Barker Holdings, A1:The Penthouse | |
| Barker Insurance, A1:Suite A20/A21 The Avenue | |
| Bayer Pharmacuticals, A1:Block A, The Atrium | |
| BBC Advertising, A1:Apex Business Centre | |
| BDI Telecom Ltd, A1:Unit 61D Heather Road | |
| Beacon Automotive, A1:40A Heather Road | |
| Beacon Car Valeting & Smart Repair, A1:Beacon South Quarter | |
| Beacon Construction Management Team, A1:Blackthorn Road | |
| Beacon Consultants Clinic, A1:Beacon Court | |
| Beacon Consultants Concourse, A1:Suite D The Concourse | |
| Beacon Court Management Suite, A1:Suite D The Concourse | |
| Beacon Court Security, A1:Beacon Court | |
| Beacon Dermatology, A1:Suite A36 The Mall | |
| Beacon Hospital, A1:Beacon Court | |
| Beacon Hotel, A1:Beacon Court | |
| Beacon Medical Group, A1:Suite A36 The Mall | |
| Beacon Renal, A1:Suite A35 The Mall | |
| Beacon South Quarter Site Office, A1:Unit 56 Blackthorn Road | |
| Beechfield, A1:Unit 69C Heather Road | |
| Berry Wallcoverings, A1:Unit T28 Rowan Avenue | |
| Berry's Wallcovering Ltd., A1:The Penthouse | |
| Bibby Financial, A1:Heather House | |
| Billings, A1:Unit C, The Penthouse | |
| Bio-Industries Ltd., A1:Unit 66D Heather Road | |
| Biofuture Ltd., A1:Unit 62C Heather Road | |
| Bizmart, A1:Unit A1 Three Rock Road | |
| Bizquip Ltd., A1:Unit 7/8 Sandyford Park | |
| BMC Software Europe, A1:Ballymoss House | |
| BMV Consultants, A1:Unit 1C Crossfield House | |
| Boehringer Ingleheim Ireland Ltd., A1:Corrig Court | |
| Bord Gais, A1:Arena Road | |
| Brambles Caf, A1:Raven's Rock Court | |
| Briglec Ltd., A1:Unit 63B Heather Road | |
| Brook Thomas, A1:60 Heather Road | |
| Brookfield Press, A1:Unit 6 Blackthorn Close | |
| Brooklyn Communcations Services Ltd., A1:Unit 8 The Sandyford Centre | |
| Brooklyn Engineering Services Ltd., A1:Unit 8 The Sandyford Centre | |
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