If it's on the FCC database, it's here. If it's not, it doesn't exist.
Repeaters are shared resources — often paid for and maintained by a single individual or a small group. Good operating practices keep repeaters pleasant for everyone and show respect for the repeater owner. Most of these are common sense, but they're worth reviewing.
Before keying up on a repeater, listen for at least 15-30 seconds to make sure you're not stepping on an ongoing conversation. Just because you don't hear anything the moment you turn on your radio doesn't mean the repeater is free — there may be a pause between transmissions.
FCC rules require you to identify with your callsign at the beginning and end of a communication, and at least every 15 minutes during a conversation. A simple "WRYZ123" at the start and end is all that's needed. Don't make up cute phonetic versions of your callsign — just say it clearly.
Most repeaters have a short beep or tone that sounds after each transmission. This "courtesy tone" signals that the repeater is ready for the next person to transmit. Wait for it before keying up. This brief pause also gives other stations a chance to break in if they need to.
Repeaters are shared. Long, extended conversations (called "ragchews") are fine when the repeater is quiet, but be aware that you're tying up a community resource. If you notice others trying to use the repeater, wrap it up or offer to move to a simplex frequency.
Kerchunking — keying up briefly without identifying just to see if the repeater responds — is discouraged. It ties up the repeater, annoys listeners, and is technically an FCC violation (transmitting without identification). Instead, key up and say your callsign: "WRYZ123, testing."
The right way to test: "WRYZ123, radio check" or "WRYZ123, testing." If someone responds, great. If not, you at least know the repeater heard you (you'll hear the repeater tail or courtesy tone). Either way, you've identified properly.
If someone calls for emergency assistance on the repeater, all other traffic should stop immediately. The repeater becomes that station's resource until the situation is resolved. If you hear "break break" or "emergency," stand by and stay off the repeater unless you can help.
Some repeaters are marked as "closed," meaning the owner limits access to approved users. If a repeater listing says it's closed, don't transmit on it without first contacting the owner for permission. Using a closed repeater without authorization is poor form and may get your callsign reported. Check repeater directories for open/closed status.