Just in case you need it, the standard repository list can be found in /etc/apt/sources.list. This one is for NL:

#deb cdrom:[Debian GNU/Linux 8.1.0 _Jessie_ - Official i386 NETINST Binary-1 20150606-12:58]/ jessie main

deb http://ftp.nl.debian.org/debian/ jessie main
deb-src http://ftp.nl.debian.org/debian/ jessie main

deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main

# jessie-updates, previously known as 'volatile'
deb http://ftp.nl.debian.org/debian/ jessie-updates main
deb-src http://ftp.nl.debian.org/debian/ jessie-updates main