Ref: https://www.indiapost.gov.in/VAS/Pages/digipin.aspx Technical doc current link: https://www.indiapost.gov.in/VAS/DOP_PDFFiles/DIGIPIN Technical document.pdf (this url might expire over time) Excerpt from the pdf: The detailed structure is such that the DIGIPIN is essentially an encoding of the latitude and longitude of the address into a sequence of alphanumeric symbols using the following 16 symbols: 2, 3, 4, 5, 6, 7, 8, 9, C, J, K, L, M, P, F, T. A sample DigiPIN address at the intended level of precision: 'GL8-874-X3GW' So, what would be regular expression and associated code in python for detecting and extracting a DigiPIN in a text string ? Continue reading...