If you're interested in this sort of thing (and who wouldn't be?!)

The whole notebook full of late 1950s UK telephone routing codes is online as a pdf here: https://paulseward.com/downloads/Telephony_Phreaking_Archive/TLA-FDY-TKZ.pdf

An OCR version will follow at some point in the handwavy future when I get around to it (if I don't forget).

#phreaking #preak #telephoneExchange #strowger #phoneExchange #telecom #telecoms #telecomHistory #telecomsHistory #phone #telephone