Amateur Radio Society of Bangladesh (ARSB) is the only active, government-registered national amateur radio organization in Bangladesh, officially recognized by the Bangladesh Telecommunication Regulatory Commission (BTRC). The Society operates under the BTRC-approved club call sign S21AHQ, serving as the central hub for amateur radio activities, advocacy, and emergency communication initiatives across the country. Organization is registered under the Registrar of Joint Stock Companies and Firms, under the Societies Act 1860