南線

Proper noun

 * 1)  Southern Luzon; Provinces in Luzon further south of Metro Manila, especially the provinces of Batangas, Quezon province, and the Bicol Region.

Usage notes
Usage in the Philippines is the old dated or archaic term referring to the general region further south of Metro Manila. These are terms used by wholesale merchants trading across different parts of the Philippines centered from the perspective of Metro Manila, the National Capital Region (NCR) of the Philippines.