[1] Telephone numbers introduced since May 2000 by the incumbent operator begin with "2" (generally 26, 24 and recently 27[2]) followed by two to six digits.
As more PBXs were installed in offices in Luxembourg compared to areas with almost exclusively residential customers, this led to the impression that numbers in Luxembourg City would be longer than six digits.
The regulator therefore decided that new phone numbers must be eight digits long including the extension.
Mobile telephone numbers always carry a three-digit network code, in the format "6x1", which is followed by six digits.
The numbers have a fixed length of 12 digits and start with "60", the only assigned network code from this range is: