World map of the national trunk codes for changing the local area network and get to another dialing code in telephone traffic
<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Maximilian Dörrbecker</a> (<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Chumwa</a>)
CC BY-SA 2.0
<span class="int-own-work" lang="en">Own work</span>, using <a href="//commons.wikimedia.org/wiki/File:World_Map_Blank.svg" title="File:World Map Blank.svg">Image:World_Map_Blank.svg</a>