Radio Code???

OKay, whats with this radio code thing? I was looking up factory Acura Integra radios and I got this one auction that stated this:
ACURA AM/FM CD Player

Model: 39100-ST7-A500

Faceplate number: 1XJ0
SOLD WITH CODE!

What up with the code? What is it for? Sorry if this is a dumb question. Also, this guy says that this radio retails from the Acura dealer at 945.00! Can that be true? Its only AM/FM CD!

[Rob]

without the code, the radio won't work....it's part of the factory security feature........

How do you input a code in the radio? Is this like that Civic thing? Where the remote keyless entry is in the radio... Lol. I am dumb, I dont get it.

[Rob]

lol...no, the way that it works is that you'll have a 5 number code that you enter in through your preset buttons...obviously the code wll have numbers that are 1 thru 6....

Ohhhh, okay. Hmm, and that is to prevent the factory radio from being stolen and used...couldnt someone say, steal one of these radios and look up a code on the internet?

[Rob]

not sure...the quickest way to find out is if the card from Acura/Honda is included...I have a little business card like card with the code stamped on it for my factory radio.........

[fertooos]

I believe some cities have even more codes. Or maybe their codes are not 3 digits but 4 or 5. 3-digit code is not enough to cover huge megalopolises. I may be wrong, and such a thing should be checked on official cites https://dialcodes.co.uk/areacodes/0151. The code system can be updated regularly in view of the growing population and territory. So if you haven’t checked your area code recently, verify it.

[TimmyHollins]

Hmm, that may very well be the case. Still, that link looks sketchy.

[bisseranast]

I prefer to listen to music online from my iPhone