| Sunderland |
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| Sunderland 0191-4 Sunderland UK - United Kingdom Telephones |
| Area Code : 0191-5xx xxxx - Sunderland and East Durham |
| The old Five-digit Numbers in Sunderland were prefixed with 51 or 56; e.g., Sunderland (0783) 72000 became (091) 567 2000, and (0783) 43077 became (091) 514 3077. |