Postcodes in Taiwan changed in Match of this year from a 3 + 2 format (eg. 10058) to a 3 + 3 format (eg. 100013). If you want to make sure to get your parcel, make sure you find out your new postcode on this site:
The site has pretty simple pull down options (in Chinese) to select your city/county and district/township. You’ll have to find your street in the pull down menu, or if you use the second box, just type in your street and select the section.
The results will look something like this:
「雙」 refers to even numbers, 「單」to odd numbers and 「全」 is all numbers (both even and odd), 「以上」 is above and inclusive of, while 「以下」 is below and inclusive of. So for example, the first entry is “even numbers 96 and below on Yanping South Road”. If you’re road has sections, this will be listed under 「段號」 (section no.), while the third is “odd numbers from 87 to (至) 117.