Bao wrote:I don't agree that saying phone numbers as two or three digit numbers makes any sense at all. It takes more concentration to en- and decode a three digit number than three single digit numbers that are said with a pause before and after. The only time it makes sense to say two or three digit numbers is when memorizing and recalling a phone number, something we rarely do nowadays. Plus, people who memorized a phone number really well and can rattle it off are often too fast for the listener to write it down, let alone remember it without taking a note ...
I'd say it's fairly common to write down (or say) certain phone numbers in twos or threes. It's easier to memorize fewer "chunks". Many services have "rhyming" phone numbers (e.g. 200 200, 118 118, 114 14, xx 00 00, xx yy xx and so on).