555/Headscratchers: Difference between revisions

** And no, even 555 is not guaranteed to be free of individual subscriber's numbers... if dialled overseas. It's also (mostly) not reserved in area code +1-800. The reservations on 555 (information numbers), 950 (alternate long distance carriers), 959 and usually 958 (test numbers) are specific to the North American numbering plan. 123-4567 isn't valid in North America, but might be possible in other countries. Even within country code +1, codes which used to be safe (such as "area code 311") yesterday might dial City Hall today. The reservation on 0 or 1 in the second digit of North American numbers to indicate an area code was abolished in 1995 (so the "6060-842" which was a safe fake number to put on the B-side of the B52's "Rock Lobster" single at the end of the 1970's could well be somebody's working number today).

 

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