Zeolites are highly versatile microporous aluminosilicate materials widely employed in various industrial applications, including catalysis, adsorption and separation. Zeolite ZSM-5 stands out as one of the most extensively used zeolites in the petrochemical industry, where it can serve as an efficient catalyst for hydrocarbon transformations. The catalytic activity of zeolites is primarily governed by their chemical composition, with structural features such as channel shape, accessible pore volume, and the positioning of aluminium atoms within the framework significantly influencing their catalytic behaviour. Accurately determining the position of aluminium atoms within the zeolite framework is useful for understanding and optimizing catalytic properties. However, traditional techniques like X-ray crystallography have inadequate sensitivity for distinguishing between aluminium and silicon atoms and thus it cannot be used for the determination of the aluminium siting. In contrast, nuclear magnetic resonance (NMR) spectroscopy, particularly Al NMR, has emerged as a powerful tool for probing the local environments of aluminium atoms in zeolites. Several studies have attempted to correlate experimental Al NMR spectra with specific T-sites in the zeolite framework. However, sizable inconsistencies in the calculated chemical shifts reported in these studies illustrate the continuing challenges faced by researchers in this field.