Amateur radio operators such as myself would. My license callsign is W3DTV. If you heard me say, "(Your callsign), This is whiskey-three-(radio static)-victor" and you are a fellow amateur radio operator you would say, "QRZ", as shorthand for "who is calling me?" and I would know you didn't hear my callsign so I would repeat, "(Your callsign), This is whiskey-three-delta-tengo-victor". QRZ like all other Q codes are used internationally in the amateur radio community.
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