Analysis of information sources in references of the Wikipedia article "Arachosia" in Turkish language version.
... Arachosia (modern Arghandab district in Afghanistan and neighboring areas of southeastern Afghanistan and northern Pakistan).
Arachosia is a mountainous area in which is now the border territory between Afghanistan and Pakistan...
Arachosia, covering an area from Kandahar and Quetta to the western bank of the Indus, shared its northern boundary with Gandhara.
According to Ptolemy 6.20.1 (cf. Strabo 15.2.9), Arachosia bordered on Drangiana in the west, on the Paropamisadae (i.e., the satrapy of Gandāra) in the north, on a part of India in the east, and on Gedrosia (or, according to Pliny, Natural History 6.92, on the Dexendrusi) in the south; Ptolemy also mentions (6.20.3) several tribes of Arachosia by name—the Parsyetae, and, to the south, the Sydri, Rhoplutae, and Eoritae.
According to Ptolemy 6.20.1 (cf. Strabo 15.2.9), Arachosia bordered on Drangiana in the west, on the Paropamisadae (i.e., the satrapy of Gandāra) in the north, on a part of India in the east, and on Gedrosia (or, according to Pliny, Natural History 6.92, on the Dexendrusi) in the south; Ptolemy also mentions (6.20.3) several tribes of Arachosia by name—the Parsyetae, and, to the south, the Sydri, Rhoplutae, and Eoritae.
