Either way works, and I’m sure there are people who may have strong opinions one way or the other.
The codes right now, as registered in the DNS, are cc1.mytsn.net or cc2.mytsn.net or cc3.mytsn.net (I was going for brevity), but they could easily be “whatever-we-want”.mytsn.net
Either way (numbers or url) can be worked in with good role-playing. We can still say things like, “Officers, make sure your consoles have been updated with the latest security protocols; Raven and Phoenix please switch to Secure Command Code Channel 1; Lancer and Viper patch in to TAC-2.”
Officers who have been around would then know how to enter those without waiting for the chat text to come in from the command officer, which needs to be re-pasted into the chat every time someone enters the ship channel after-the-fact.
