The remaining fields are bilingual - English in combination with either Dutch, French or German - depending on the official language of the place of residence of the subject.

Cards issued to third country nationals are red and blue, in common with the standard EU format.

All such cards carry a heading of "BEL" and "TITRE DE SÉJOUR" or "VERBLIJFSTITEL" or "AUFENTHALTSTITEL".

The title and all fields are monolingual - in Dutch, French or German - depending on the official language of the place of residence of the subject.

The National Register number is issued to the person upon their first registration (i.e. usually at birth for Belgian citizens) and held for life.

It comprises 11 digits in the form yy.mm.dd-xxx.cd where yy.mm.dd is the birth date, xxx is a sequential number (odd for males and even for females) and cd a check-digit.