| Londonderry Port and Harbour Commissioners (Foyle Port) | Port | Londonderry Port and Harbour Commissioners (Foyle Port), Port Road, Lisahally, Londonderry BT47 6FL | http://www.foyleport.com/ | +44 28 7186 0555 | Londonderry | Lisahally | BT47 6FL |
| Derry Business | | Derry Business, 210 Cornshell Fields, Londonderry BT48 7UL | http://derrybusiness.com/ | +44 28 7135 5679 | Londonderry | | BT48 7UL |
| Area Youth Office | Youth club | Area Youth Office, 40 Dungiven Rd, Londonderry BT47 6BW | | +44 28 7131 3444 | Londonderry | | BT47 6BW |
| County Londonderry | | County Londonderry | | | | | |
| Collon Terrace NI Housing Executive Office | Department of housing; District office | Collon Terrace NI Housing Executive Office, 14 Collon Terrace, Londonderry BT48 7QP | http://www.nihe.gov.uk/ | | Londonderry | | BT48 7QP |
| Londonderry Delivery Office | Post Office | Londonderry Delivery Office, County, 15-31 Great James St, Londonderry BT48 7BE | https://www.royalmail.com/services-near-you/delivery-office/londonderry-delivery-office-bt48-7be | +44 345 774 0740 | Londonderry | | BT48 7BE |
| The Drink Company | Takeaway | The Drink Company, 14-20 Dungiven Rd, Londonderry BT47 6BW | https://thedrinkco.co.uk/9UwO | +44 28 7127 7919 | Londonderry | | BT47 6BW |
| Iona Business Park | Business park | Iona Business Park, Londonderry BT48 0GJ | | | Londonderry | | |
| NWRC Business Support Centre | Business Centre | NWRC Business Support Centre, 78-80 Strand Rd, Londonderry BT48 7AL | http://bsc.nwrc.ac.uk/ | +44 7436 836313 | Londonderry | | BT48 7AL |
| OFFICE Londonderry | Shoe Shop | OFFICE Londonderry, Foyleside Centre, Unit M4/M5, Londonderry BT48 6XY | https://www.office.co.uk/ | +44 20 3410 6291 | Londonderry | | BT48 6XY |
| Springtown Business Park | Business park | Springtown Business Park, Firstsource Solutions Limited | | | Londonderry | | |
| North West Business Complex | Business Centre | North West Business Complex, Beraghmore Rd, Londonderry BT48 8SE | | +44 28 7135 9106 | Londonderry | Londonderry | BT48 8SE |
| Royal Mail | Post Office | Royal Mail, 31 Great James St, Londonderry BT48 7BE | http://www.royalmail.com/ | | Londonderry | | BT48 7BE |
| Moore (N.I.) LLP | Accountant; Accounting firm; Auditor; Business development service; Business management consultant; Chartered accountant; Tax Advisor; Tax preparation; Tax preparation service | Moore (N.I.) LLP, 21-23 Clarendon St, Londonderry BT48 7EP | https://www.moore.co.uk/msuk/northern-ireland | +44 28 7126 1020 | Londonderry | | BT48 7EP |
| Education Authority Western Region | Educational institution | Education Authority Western Region, 35 Foyle St, Londonderry BT48 6AL | | +44 28 7127 2300 | Londonderry | | BT48 6AL |
| State Number | Software company | State Number, 10 Nualamont Dr, Londonderry BT48 9PH | http://xn--c1aeudebqd.com/ | +44 28 7122 6151 | Londonderry | | BT48 9PH |
| Staffline Recruitment Ireland | Derry-Londonderry | Recruiter; Job Centre; Temp agency | Unit 2A, Staffline Recruitment Ireland | Derry-Londonderry, 20 Strand Rd, Londonderry BT48 7AB | https://stafflinerecruit.com/branches/derry-londonderry | +44 28 7126 7799 | Londonderry | | BT48 7AB |
| District Registrars Office | Registry office; Government office | District Registrars Office, 14 Magazine St, Londonderry BT48 6HH | https://www.nidirect.gov.uk/contacts/district-registrars-northern-ireland | +44 28 7137 6520 | Londonderry | | BT48 6HH |
| SPACEHUB BUSINESS PARK, STORAGE & OFFICES | Business Centre; Delivery service; Shredding Service; Storage facility; Virtual office rental | SPACEHUB BUSINESS PARK, STORAGE & OFFICES, 20C Balliniska Rd, Londonderry BT48 0NA | http://spacehubderry.com/ | +44 7702 206161 | Londonderry | | BT48 0NA |
| Democratic Unionist Party Londonderry | Political party office | First Floor, Democratic Unionist Party Londonderry, Waterside Centre, 23 Glendermott Rd, Londonderry BT47 6BG | http://www.mydup.com/ | +44 28 7134 6271 | Londonderry | | BT47 6BG |
| Ulster University, Derry-Londonderry Campus | University; School | Ulster University, Derry-Londonderry Campus, Northland Rd, Londonderry BT48 7JL | https://www.ulster.ac.uk/campuses/magee | +44 28 7012 3456 | Londonderry | | BT48 7JL |
| Foyle Jobs & Benefits Office | Job Centre | Foyle Jobs & Benefits Office, Crown Buildings, Asylum Rd, Londonderry BT48 7EA | https://www.nidirect.gov.uk/contacts/foyle-jobs-benefits-office | +44 300 200 7822 | Londonderry | Londonderry | BT48 7EA |
| FinTrU (North West) - City Factory Office | Financial institution | FinTrU (North West) - City Factory Office, City Factory, 100 Patrick St, Londonderry BT48 7EL | http://www.fintru.com/ | +44 28 9592 4558 | Londonderry | | BT48 7EL |
| Northern Ireland Housing Executive | Housing Development; Housing Offices | Northern Ireland Housing Executive, 14 Collon Terrace, Londonderry BT48 7QP | https://nihe.gov.uk/ | +44 344 892 0900 | Londonderry | | BT48 7QP |
| Newtownstewart Ltd | Business Park | Newtownstewart Ltd, Ulster Science & Technology Park, Buncrana Rd, Londonderry BT48 0SP | http://www.newtownstewart.co.uk/ | +44 28 7100 1111 | Londonderry | Londonderry | BT48 0SP |
| HR Team | Human resource consulting | HR Team, 10A Ebrington Sq, Londonderry BT47 6FA | https://hrteamservices.com/ | +44 28 7127 1882 | Londonderry | Londonderry | BT47 6FA |
| Government Of Northern Ireland Land & Property Services | Land registry office; Government office | Government Of Northern Ireland Land & Property Services, 75 Duke St, Londonderry BT47 6FP | http://www.lpsni.gov.uk/ | +44 28 7131 9000 | Londonderry | | BT47 6FP |
| Clarendon International Facilities Management Limited | Business management consultant | Clarendon International Facilities Management Limited, 73 Clarendon St, Londonderry BT48 7ER | | | Londonderry | | BT48 7ER |
| Mercury Order | Software company; E-commerce service; Internet marketing service | Mercury Order, Grofuse Ltd Catalyst Inc, Bay Rd, Londonderry BT48 7TQ | https://mercuryorder.com/ | +44 28 7122 8820 | Londonderry | Londonderry | BT48 7TQ |
| Lisnagelvin Jobs & Benefits Office | Job Centre | Lisnagelvin Jobs & Benefits Office, 2 Crescent Rd, Londonderry BT47 2NJ | https://www.nidirect.gov.uk/contacts/lisnagelvin-jobs-benefits-office | | Londonderry | | BT47 2NJ |
| Waterloo Place Housing Executive Office | Government office; District office; Property management company | 1, Waterloo Place Housing Executive Office, 3 Waterloo Pl, Londonderry BT48 6BS | http://www.nihe.gov.uk/ | +44 344 892 0900 | Londonderry | | BT48 6BS |
| County Derry Post | Publisher | County Derry Post, 26 Balliniska Rd, Londonderry BT48 0NA | http://www.derrynow.com/ | +44 28 7774 3970 | Londonderry | | BT48 0NA |
| The Siege Museum | Museum; Tourist attraction | The Siege Museum, 13 Society St, Londonderry BT48 6PJ | http://www.thesiegemuseum.org/ | +44 28 7126 1219 | Londonderry | | BT48 6PJ |
| Careers Service | Job Centre | Careers Service, 19 The Diamond, Londonderry BT48 6HN | https://www.nidirect.gov.uk/contacts/contacts-az/londonderry-careers-office | +44 300 200 7820 | Londonderry | | BT48 6HN |
| Commerical Finance Northern Ireland | Commercial property estate agent; Property management company | Commerical Finance Northern Ireland, 3 Glendermott Rd, Londonderry BT47 6BA | http://www.okeefeestateagents.com/ | +44 28 7131 1103 | Londonderry | | BT47 6BA |
| The Derry Walls | Historical landmark | The Derry Walls, The Diamond, Londonderry BT48 6HW | http://www.thederrywalls.com/ | +44 7894 534553 | Londonderry | | BT48 6HW |
| North West Region Cross Border Group | Council | North West Region Cross Border Group, 98 Strand Rd, Londonderry BT48 7NN | | +44 28 7137 0808 | Londonderry | | BT48 7NN |
| Embassy Building | Corporate office | Embassy Building, Londonderry BT48 6BB | | | Londonderry | | |
| Deveire - Regional Office | Software company | Deveire - Regional Office, The Innovation Centre, Bay Rd, Londonderry BT48 7TG | http://www.deveire.com/ | +353 61 536 370 | Londonderry | | BT48 7TG |
| Waterside Housing Executive Office | Property management company; District office | Waterside Housing Executive Office, 2 Glendermott Rd, Waterside, Londonderry BT47 1AU | http://www.nihe.gov.uk/ | +44 344 892 0900 | Londonderry | Waterside | BT47 1AU |
| Long's Supermarkets Ltd - Head Office | Corporate office; Supermarket | Long's Supermarkets Ltd - Head Office, Carrakeel Dr, Maydown, Londonderry BT47 6UQ | | | Londonderry | Maydown | BT47 6UQ |
| Ardisle | Corporate office | Unit 6b, Ardisle, Pennyburn Industrial Estate, Londonderry BT48 0LU | | | Londonderry | Londonderry | BT48 0LU |
| Government of Northern Ireland Road Service | Government office | Government of Northern Ireland Road Service, County, 1 Crescent Rd, Londonderry BT47 2NQ | | +44 28 7132 1600 | Londonderry | | BT47 2NQ |
| The Soft Drink Co | | The Soft Drink Co, Unit 18/Rathmore Centre/Blighs La, Londonderry BT48 0LZ | | +44 28 7136 3341 | Londonderry | | BT48 0LZ |
| Department of Education | Government office | Department of Education, Waterside House, 75 Duke St, Londonderry BT47 6FP | | +44 28 7131 9000 | Londonderry | | BT47 6FP |
| Carlisle House | Call Centre | Carlisle House, 16A Carlisle Rd, Londonderry BT48 6JN | | | Londonderry | | BT48 6JN |
| Guildhall | Town Hall | Guildhall, Londonderry BT48 7BB | https://guildhallderry.com/ | +44 28 7137 6510 | Londonderry | Londonderry | BT48 7BB |
| Building 80/81 | Co-working Space | Building 80/81, Ebrington Square, Londonderry BT47 6HN | | +44 28 7116 0237 | Londonderry | Londonderry | BT47 6HN |
| 104 at Ebrington Square | Office rental agency | 104 at Ebrington Square, 104 Hill Ave, Londonderry BT47 6HF | https://www.104ebrington.com/ | +44 28 7135 2693 | Londonderry | | BT47 6HF |
| Lime cabin | Government office | Lime cabin, 1 Clooney Rd, Londonderry BT47 6TG | | | Londonderry | | BT47 6TG |
| Irlandja | Corporate office | Irlandja, 10 Haw Rd, Strathfoyle, Londonderry BT47 6XT | | | Londonderry | Strathfoyle | BT47 6XT |
| Enterprise North West | Business management consultant | Enterprise North West, Skeoge Industrial Estate, NW Business Complex, Beraghmore Road, Londonderry BT48 8SE | http://www.enterprisenw.com/ | +44 28 7135 2693 | Londonderry | Londonderry | BT48 8SE |
| Coyle Doherty Company | Business management consultant | Coyle Doherty Company, 18 Clarendon St, Londonderry BT48 7ET | http://coyledoherty.com/ | +44 28 7137 1826 | Londonderry | | BT48 7ET |
| Derry City and Strabane District Council | Council | Derry City and Strabane District Council, 98 Strand Rd, Londonderry BT48 7NN | http://www.derrystrabane.com/ | +44 28 7125 3253 | Londonderry | | BT48 7NN |
| Richmond Chambers Housing Executive Office | Housing Offices | Richmond Chambers Housing Executive Office, Richmond Chambers, The Diamond, Londonderry BT48 6QP | http://www.nihe.gov.uk/ | +44 344 892 0900 | Londonderry | Londonderry | BT48 6QP |
| CULMORE (DERRY DIOCESE) IRELAND | Corporate office | CULMORE (DERRY DIOCESE) IRELAND, Rev John Mc, PP, 11 Steelstown Rd, Londonderry BT48 8EU | http://culmoreparish.com/ | +44 28 7135 1718 | Londonderry | | BT48 8EU |
| Fermanagh Enterprise Limited | Business Centre; Business management consultant; Conference Centre; Co-working Space; Office rental agency | Fermanagh Enterprise Limited, Enniskillen Business Centre, 21 Lackaghboy Rd, Enniskillen BT74 4RL | http://www.fermanaghenterprise.com/ | +44 28 6632 3117 | Enniskillen | | BT74 4RL |
| Waterways Ireland Headquarters | Government office | Waterways Ireland Headquarters, 2 Sligo Rd, Enniskillen BT74 7JY | http://www.waterwaysireland.org/ | +44 28 6632 3004 | Enniskillen | | BT74 7JY |
| SEFF Head Office | Disability services and support organization | SEFF Head Office, 21 Cherryhill, Lisnaskea, Enniskillen BT92 0LE | | | Enniskillen | Lisnaskea | BT92 0LE |
| ABBEY HOUSE BUSINESS CENTRE | Business Centre | ABBEY HOUSE BUSINESS CENTRE, 11 Head St, Enniskillen BT74 7JL | http://www.fermanaghenterprise.com/ | +44 28 6632 3117 | Enniskillen | | BT74 7JL |
| Farm | Corporate office | Farm, Enniskillen BT92 2BZ | | | Enniskillen | | BT92 2BZ |
| Fermanagh Housing Executive Office | District office; Council; Property management company | Fermanagh Housing Executive Office, Riverview House, Head St, Enniskillen BT74 7DA | http://www.nihe.gov.uk/ | +44 344 892 0900 | Enniskillen | | BT74 7DA |
| Irish Central Border Area Network (ICBAN) Ltd. | Corporate office; Property management company | Irish Central Border Area Network (ICBAN) Ltd., Enniskillen Business Centre, 21 Lackaghboy Rd, Enniskillen BT74 4RL | http://www.icban.com/ | +44 28 6634 0710 | Enniskillen | | BT74 4RL |
| Killyhevlin Business Centre | Business Centre; Business development service; Business management consultant; Business-to-Business service; Office rental agency | Killyhevlin Business Centre, 3 Black Stick Rd, Killyhevlin, Enniskillen BT74 4EB | https://www.fermanaghenterprise.com/business-premises/killyhevlin-business-centre/ | +44 28 6632 9269 | Enniskillen | Killyhevlin | BT74 4EB |
| The Workhouse Enniskillen | Co-working Space | The Workhouse Enniskillen, Enniskillen BT74 6DS | https://theworkhouseenniskillen.com/ | +44 28 6634 2226 | Enniskillen | Enniskillen | |
| Fermanagh County Show | Attractions; Farm; Tourism | Exhibition & Auction Centre, Fermanagh County Show, Tempo Rd, Enniskillen BT74 4BA | http://fermanaghcountyshow.com/ | +44 28 6632 2509 | Enniskillen | | BT74 4BA |
| Fermanagh House | Non-profit organisation; Charity | Fermanagh House, Broadmeadow Pl, Enniskillen BT74 7HR | http://www.fermanaghhouse.org/ | +44 28 6632 0210 | Enniskillen | | BT74 7HR |
| Fermanagh & Omagh District Council | Council | Fermanagh & Omagh District Council, 2 Townhall St, Enniskillen BT74 7BA | http://www.fermanaghomagh.com/ | +44 300 303 1777 | Enniskillen | | BT74 7BA |
| Fermanagh Lakeland Tourism | Tourist Information Centre; Information Centres | Fermanagh Lakeland Tourism, Wellington Rd, Enniskillen BT74 7HL | http://www.fermanaghlakelands.com/ | +44 28 6632 5000 | Enniskillen | Enniskillen | BT74 7HL |
| Government Of Northern Ireland Department Of Agriculture And Rural Development | Government office | Government Of Northern Ireland Department Of Agriculture And Rural Development, Inishkeen House, Killyhevlin, Enniskillen BT74 4EJ | https://www.nidirect.gov.uk/contacts/contacts-az/daera-direct-office-enniskillen | +44 28 6632 5004 | Enniskillen | Killyhevlin | BT74 4EJ |
| Beatty Fuels Depot | Corporate office | Beatty Fuels Depot, 34 Beechgrove Park, Baragh, Ballinamallard, Enniskillen BT94 2BG | http://www.beattyfuels.co.uk/ | +44 28 6638 8242 | Enniskillen | Baragh, Ballinamallard | BT94 2BG |
| Kinawley Enterprise Park | Business Park | Kinawley Enterprise Park, Unnamed Road, Enniskillen BT92 4FH | | | Enniskillen | | BT92 4FH |
| Department for Infrastructure Rivers Agency | Government office | Department for Infrastructure Rivers Agency, Bellanamallard, Enniskillen BT94 2NA | https://www.infrastructure-ni.gov.uk/dfi-rivers-overview | +44 28 6638 8529 | Enniskillen | Bellanamallard | BT94 2NA |
| Erne Administrative Services | Business administration service | Unit 3, Erne Administrative Services, 21 Lackaghboy Rd, Enniskillen BT74 4RL | | +44 7880 605991 | Enniskillen | | BT74 4RL |
| Prop Protector | Corporate office; Manufacturer | Prop Protector, 60 Gurteen Rd, Garrison, Enniskillen BT93 4AW | http://prop-protector.co.uk/ | +44 28 6865 8839 | Enniskillen | Garrison | BT93 4AW |
| Anomali | Corporate office | Anomali, City Quays 1, 7 Clarendon Rd, Belfast BT1 3BG | https://www.anomali.com/ | +44 844 484 7328 | Belfast | | BT1 3BG |
| Four Seasons Regional Office | Corporate office | Four Seasons Regional Office, 163 York St, Belfast BT15 1AL | | | Belfast | | BT15 1AL |
| Victoria House | Corporate office | Victoria House, 15 Gloucester St, Belfast BT1 4LS | | +44 28 9033 2428 | Belfast | | BT1 4LS |
| Centre Recruitment | Corporate office | Centre Recruitment, Forsyth House, Cromac St, Belfast BT2 8LA | | +44 7743 729568 | Belfast | | BT2 8LA |
| Sodexo | Corporate office | Sodexo, Riverside Office Park, Redwood House, Newforge Ln, Belfast BT9 5NT | http://uk.sodexo.com/home.html | +44 28 9038 0750 | Belfast | | BT9 5NT |
| Armagh Business Centre Ltd | Business Centre; Business management consultant; Business Park | Armagh Business Centre Ltd, 2 Loughgall Rd, Armagh BT61 7NH | https://www.abcarmagh.com/ | +44 28 3752 5050 | Armagh | | BT61 7NH |
| Montgomery Yard | Corporate office | Montgomery Yard, Armagh, Craigavon BT62 4HF | | | Craigavon | Armagh | |
| Armagh Housing Executive Office | Property management company; District office | Armagh Housing Executive Office, 48 Dobbin St, Armagh BT61 7QQ | http://www.nihe.gov.uk/ | +44 344 892 0900 | Armagh | | BT61 7QQ |
| Kit Sportswear | Corporate office | 2b, Kit Sportswear, 141 Loughgall Rd, Armagh BT61 8EW | http://kitsportswear.com/ | +44 28 3751 8221 | Armagh | | BT61 8EW |
| Dean Swift Building | Office rental agency | Dean Swift Building, Hamiltonsbawn Rd, Armagh BT60 1HW | http://www.deanswiftbuilding.com/ | +44 28 3778 9237 | Armagh | Armagh | BT60 1HW |
| Kilmore Farm | Corporate office | Kilmore Farm, Armagh BT71 7JE | | | Armagh | | |
| Armagh City, Banbridge & Craigavon Borough Council | Council | Armagh City, Banbridge & Craigavon Borough Council, Council Offices, The Palace Demesne, Armagh BT60 4EL | https://www.armaghbanbridgecraigavon.gov.uk/ | +44 300 030 0900 | Armagh | | BT60 4EL |
| DFI Roads Service - Armagh Section Office | Corporate office | DFI Roads Service - Armagh Section Office, Bannvale Villas, Armagh BT60 1DX | | | Armagh | | BT60 1DX |
| Armagh Business Park | Office rental agency | Armagh Business Park, Hamiltonsbawn Rd, Armagh BT60 1HW | | +44 28 3778 9237 | Armagh | Armagh | BT60 1HW |
| Armagh Registry Office | Registry office | Armagh Registry Office, Council Offices the Palace Demesne, Armagh BT60 4EL | https://www.armaghbanbridgecraigavon.gov.uk/ | +44 28 3752 9615 | Armagh | | BT60 4EL |
| JMW Farm | Corporate office | JMW Farm, 74-68, A29, Armagh BT61 8DW | | | Armagh | | BT61 8DW |
| Armagh Jobs & Benefits Office - | Job Centre | Armagh Jobs & Benefits Office -, Alexander Rd, Armagh BT61 7JP | https://www.nidirect.gov.uk/contacts/armagh-jobs-benefits-office | +44 300 200 7822 | Armagh | | BT61 7JP |
| Headquarters | Hairdresser | Headquarters, 15 Dobbin St, Armagh BT61 7QH | | +44 28 3752 6550 | Armagh | | BT61 7QH |
| McCloskey | Corporate office | McCloskey, 110 Trewmount Rd, Dungannon BT71 7EF | | | Dungannon | | BT71 7EF |
| Armagh County Agricultural Show Ltd | Agriculture; Country park; Festival | Armagh County Agricultural Show Ltd, Armagh Business Centre Loughgall Rd, Armagh BT61 7NH | http://armaghshow.com/ | +44 28 3752 2333 | Armagh | | BT61 7NH |
| Steven Ambatukam & Co | Corporate office | Steven Ambatukam & Co, 17 Gosford Vw Mnr, Markethill, Armagh BT60 1PF | | | Armagh | Markethill | BT60 1PF |
| Formation Works | Office rental agency; Serviced accommodation | Formation Works, 2 Edenaveys Industrial Estate, Edenaveys Rd, Armagh BT60 1NF | https://formationworks.co.uk/ | +44 28 3799 8338 | Armagh | | BT60 1NF |
| Armagh Parish Office | Parish | Armagh Parish Office, 41a Cathedral Rd, Armagh BT61 7QX | http://www.armaghparish.net/ | +44 28 3752 2813 | Armagh | | BT61 7QX |
| ALLSPORT | Corporate office | ALLSPORT, 34 Kilmore Rd, Lurgan, Craigavon BT67 9BP | http://allsportltd.org/ | +44 7871 110714 | Craigavon | Lurgan | BT67 9BP |
| County Armagh Phoenix Group | Non-profit organisation | County Armagh Phoenix Group, 3 Mallview Terrace, Armagh BT61 9AN | | +44 28 3752 7802 | Armagh | | BT61 9AN |
