In the UK, 075 is not a geographic area code but the beginning of a mobile phone number. Mobile numbers in the UK typically start with 07, and the next digit (like 5) helps identify the network operator originally assigned to the number. However, mobile numbers can now be ported between networks, so the prefix doesn’t always indicate the current provider.
If you’re looking for a specific location, mobile numbers like those starting with 075 are not tied to any geographic region.