if you're not lucky enough to have an alpha-numeric pager, then it's often difficult to assume what a person wants when they page you. that is why some genius invented this system which, like most things, has little rhyme or reason, but regardless, we use it. to utilize these codes, simply page someone with your phone number and follow it up with the appropriate code:
911: an emergency. call back immediately. can be repeated ad nauseum to convey urgency.
411: information. usually used when you have the news, but can be used as a request.
424: call me back. the code represents the number of letters in each word, as do alot of these.
4243: call me back now. a more urgent version of the one above. used when the person has limited access to the phone they're paging you to, such as a borrowed cellphone or payphone.
123: hurry up.
1020: where are you? according to /dev/joe, "the number 1020... is borrowed from the police/ham radio Ten Codes, in which 10-20 is a request for your location".
007: i have a question (it looks vaguely similar to "..?")
143: i love you.
1436: i love you always.
47: good morning.
45: good night.
56: sweet dreams.
43: fuck you.
823: thinking of you.
please node your own codes, and never again look at your pager and think, "what the fuck is all this crap about?"