All these businesses, long ago, decided that it would be cool if their phone numbers could be used to spell out shit. This would make the numbers easier to remember.
So we got numbers like 1-800-CALL-ATT and stuff.
Phone companies started picking up on this, and started charging more for phone numbers that businesses could use this way.
Eventually, either they ran out of numbers or the businesses ran out of money, and so you don't see very many new phone numbers that spell shit anymore.
What you get, instead, is phone numbers that spell the first part of something, and the advertising is beating us to death with this:
Don't forget! Call 1-800-I-CAN-NOT-FUCKING-COUNT today!
And I just know that there are people out there dialing every single number even though the last zillion or so don't even count.