01720 is the area code for the Isles of Scilly area in the Isles of Scilly region. The 1720 region includes places like: St Mary's, Hugh Town, St Martin's and Tresco, among others.
The majority of numbers utilizing the 01720 area code are regular Isles of Scilly landlines, however it should be noted that this might be misleading. Many businesses don’t provide a service that is connected or requires a physical address, but if they have a phone number, they have an area code.
Areas using 01720 telephone numbers:
| Region | Isles of Scilly (England) | |
| Number format | 01720 XXXXXX | |
| Local number digits | 6 |
| Location | Isles of Scilly | |
| International number format | +44 1720 XXXXXX | |
| Geo | 49.92117 ,-6.29431 |
Call cost: landline connection fee depends on your service provider.