Why do some directory addresses use a street name while others use only the map-section code?

Question

Accepted Answer

Both are intended. The short form, such as 95 NW, is the directory and booklet address, and the long form with a street name, such as 95 Park Lane NW, is how the newspaper gives it. Either points to the same numbered block on the map, so it is not a printing error.

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Why do some directory addresses use a street name while others use only the map-section code?