Postal codes in Nigeria are numeric, consisting of six digits. The Nigerian Postal Service divides the country into nine regions, which make up the first digit of the code. The second and third digits, combined with the first, are the dispatch district for outgoing sorting. The last three digits represent the delivery location, which can be any of the following: a post office facility, a rural area, or an urban area. The main postal head office in each region will have a postal code ending in 0001, so Lagos has the postal code 100001. However, there seems to be some confusion regarding the correct zip code for Nigeria. Some sources suggest using 110001, 23401, or 00176. It is important to note that the postal code may vary depending on the specific location within Nigeria.