Grez-Doiceau is a municipality (12,861 inhabitants in 2013) located in the province of Walloon Brabant. The municipality includes also the villages Archennes, Biez, Bossut-Gottechain, and Nethen. The GREZ-DOICEAU post-office opened on 28 June 1858. It used a postal Distribution code 74 with bars (before 1864) and 156 with points before 1874. The NETHEN post-office opened on 26 June 1905.
Postmarks after 1950
Postal code 1390.