Telecommunications in Upper Holloway |
| Eurosom Telecom | 020 8881 8418 | | 1 Brampton Park Road, London, N22 6BG |  Map & Directions |
| Mobile Telecom Communication | 020 8886 8212 | | 34 Chase Side, London, N14 5PA | | Map & Directions |
| Morricom Tct | 020 8343 8663 | | Fiboard House, 5 Oakleigh Gardens, London, N20 9AB | | Map & Directions |
| North London Telecom Services Ltd | 020 8345 5558 | | 7G Wingate Trading Estate, High Road, London, N17 0DA | | Map & Directions |
| World Wide Telecom | 020 8889 9922 | | 3 Westbury Arc, Westbury Avenue , London, N22 6BL | | Map & Directions |
| Quick Call International Centre | 020 8881 7064 | | 1d Eldon Parade, Eldon Road, London, N22 5DU | | Map & Directions |
| Forum Communications | 020 8886 3455 | | 43-45 Chase Side, London, N14 5BP | | Map & Directions |
| Swiftnet Ltd | 020 8446 9494 | | Britannia House, 958-964 High Road, London, N12 9RY | | Map & Directions |
| Tecteon Plc | 020 8446 5005 | | Eleventh Floor Northway House, 1379 High Road, London, N20 9LP | | Map & Directions |
| Phone International | 020 8809 1843 | | 52 West Green Road, London, N15 5NR | | Map & Directions |
| Ijapa International Telephone Calls | 020 8801 5300 | | 16 Scotland Green, London, N17 9TT | | Map & Directions |
| Numero Communications Ltd | 020 8882 0002 | | 132 Green Lanes, London, N13 5UN | | Map & Directions |
| Story Telecomms Ltd | 020 8445 6978 | | Britannia House, 958 High Road, London, N12 9RY | | Map & Directions |
| Worldnet Global Communications | 0845 108 1000 | | Britannia House, 958-964 High Road, London, N12 9RY | | Map & Directions |
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