Dialplan, where does this come from?

This is not in my extension.conf file but shows up when I type
show dialplan. Is this based on the users.conf file?

[ Context ‘default’ created by ‘pbx_config’ ]
‘200’ => hint: Zap/7 [pbx_config]
1. Macro(stdexten|200|${HINT}) [pbx_config]
‘224’ => hint: SIP/224 [pbx_config]
1. Macro(stdexten|224|${HINT}) [pbx_config]
‘238’ => hint: SIP/238 [pbx_config]
1. Macro(stdexten|238|${HINT}) [pbx_config]

Yes