Does royal mail use nl beginining

A great question about postal codes!

In the United Kingdom, Royal Mail uses a different system for postal codes, known as Postcodes. These postcodes are alphanumeric and consist of two parts: the outward code and the inward code.

The outward code, also known as the "area code", starts with a letter (usually a single letter, but sometimes two) followed by one or two numbers. This part of the postcode identifies the general area or region.

The inward code, also known as the "sector code", consists of one or two letters and one or two numbers. This part of the postcode identifies a specific street or group of streets within the area.

Examples of Royal Mail postcodes in the UK include:

So, to answer your question, Royal Mail does not use "NL" as a starting letter for their postcodes. The "NL" prefix is actually used for postal codes in the Netherlands, not the UK.