Telephone Code Index - 01183
| 282801 | Air Intelligence Ltd - Maidenhead |
| 779900 | Allegis Group Ltd. - Wokingham |
| 276919 | Calculus Consultancy Services Llp - Reading |
| 218018 | Cherry White Images Ltd - Wokingham |
| 775400 | Cleaning Logistics Ltd. - Reading |
| 240700 | Conference Genie Ltd - Reading |
| 215573 | Craftsman Ltd (Granite and Quartz Surfaces) - Reading |
| 536000 | Devant Ltd - Reading |
| 217310 | EnSilica Ltd - Wokingham |
| 240017 | Flint Media Ltd - Ilfracombe |
| 282626 | Green Cloth - Farnborough |
| 759713 | Itsgonefunny.Com - Reading |
| 218446 | Joto Safaris Ltd - Reading |
| 276862 | Londis (Reading) - Reading |
| 282683 | Market Touch Ltd - Newbury |
| 240510 | Metakinetic Ltd - Wokingham |
| 776000 | Morpho Cards Uk Ltd - Wokingham |
| 776000 | Morpho Uk Ltd - Wokingham |
| 217457 | Onefish Twofish Ltd - Reading |
| 240372 | Opsview Ltd - Reading |
| 738000 | Pwt Projects Ltd - Reading |
| 278291 | R.G Johnson Bathrooms - Reading |
| 216583 | Reqiva - Reading |
| 300055 | RSDmusic - Eversley |
| 738074 | Thames Water Property Services Ltd - Reading |
| 462628 | Tristar Services Ltd - Reading |