In Slovakia, we have an addressing system invented in the Maria Theresia times: each building has a separate number, unique within the city or a suburb, in addi

In Slovakia, we have an addressing system invented in the Maria Theresia times: each building has a separate number, unique within the city or a suburb, in addition to the usual house number. In small villages, especially where streets have no names, these unique numbers are used to identify houses, as no other house numbers exists. These numbers appeared in an attempt to uniquely identify households, mainly for tax and military purposes, hence the name: conscription numbers. In a lot of places, these numbers were literally issued in the order troops marched through the town, usually starting with the church. (More on the topic: https://forgottengalicia.com/wp-content/cache/page_enhanced/forgottengalicia.com/conscription-numbers-vienna/_index.html https://forgottengalicia.com/wp-content/cache/page_enhanced/...) The fun thing about conscription numbers is that they alone can be used in addresses. For example, Nižná 496 is a valid address (where Nižná is the village name), while Nová Doba 496, Nižná is what many people would use — this village has no street-level house numbers, but streets themselves have names. Similarly, Bratislava I 501 is the same address as Hlavné námestie 1, Bratislava is the same address as Hlavné námestie 501/1, Bratislava is the same address as Hlavné námestie 501, Bratislava. Sometimes, houses have street-level numbers, but there’s no street name. For example: <https://www.openstreetmap.org/node/4738832411#map=18/49.05125/19.61773 https://www.openstreetmap.org/node/4738832411#map=18/49.0512...>. There’s a bunch of houses in this area which have addresses like Trstica 1, Trstica 3, but also have conscription numbers, so technically Iľanovo 122, Liptovský Mikuláš, Trstica 1, Liptovský Mikuláš and Trstica 1, Iľanovo are all probably valid addresses (not verified by any delivery there, though). With postal codes, IIRC all post codes in Slovakia outside of Bratislava start with 0, those in Bratislava start with 8, a remnant from the times when Czechoslovakia had a common postal code system. In Bratislava, the second digit in the postal code is the city district/suburb, three more digits define a bigger zone within it, but are largely optional; the third digit of zero means the postal code of a post office serving the area: 811 07 is an area in the Blumentál locality, 810 07 is the post office which delivers there, but a post code 810 00 would work just fine.