Telecommunication Companies in Londonderry
| Full Control Networks 01677 428700 | Northallerton, North Yorkshire DL7 9UJ 5.8 mi Horizon House | Call NowDetails |
| Synergy Telecoms 0800 014 1113 | Yarm, County Durham TS15 9AY 21.0 mi 149a High Street | Call NowDetails |
| Telecom Green 01642 205077 | Stockton-on-Tees, County Durham TS16 0DL 22.2 mi 13 Highfield Drive | Call NowDetails |
| Blake Telecom 0800 012 6636 | Darlington, County Durham DL3 0UD 22.5 mi Blake House | Call NowDetails |
| Signal Telecom 01642 713667 | Middlesbrough, North Yorkshire TS9 5JZ 25.0 mi Y2k House Millennium Court | Call NowDetails |