Hi!
Unfortunately the website you brought does not support multiple ZIP-code search (example: 1111 2222 3333 will return a results of all 3 zipcodes with addresses).
However when you use search, it will result in change of URL, for example, i'm searching for a zip-code "44787",
when i enter it and click search, URL would look like:
https://www.suche-postleitzahl.org/plz-gebiet/44787
So you can build a sitemap using https://www.suche-postleitzahl.org/plz-gebiet/
mask.
You can create an array of zip-codes in excel, and then merge them with above mask OR use WebScraper's internal Edit Metadata
menu option, and just copy the mask, then just add needed zip-codes.
There's an advanced way of creating sitemaps that require knowing how WebScraper works, let me know if you want me to help.