“73” in Morse Code

Telegraph number code for "best regards", in continuous use since the 1850s — the standard warm sign-off between operators to this day. A hidden elegance: its Morse (−−··· ···−−) is a perfect palindrome, reading identically forwards and backwards.

Letter by letter

The timing that makes it Morse: a dash lasts exactly three dots. The gap inside a letter is one dot long, the gap between letters is three, and the slash marks a seven-unit word gap. Want to hear it slower or flash it as light? Open it in the morse code translator.

More words in Morse

Verified by hand · how these write-ups are made