You would probably find a master sheet or pdf file in your fire departments office, comm officer, system admin, chief, or who is over your operations. I would go that route. If your volunteer entity is small and under the sheriff per say they would have the data you seek. If someone is familiar you may seek them out in your county sheriff, other sister volunteer fire depts. If you do indeed have a person over the communications for sure you'd want to talk to this person first and have them go over the radio.
On side note from reading unfortunately this is a all too common issue across the country in many areas where small agencies who are volunteer on conventional systems have no radio shop, system admin or comm to go to tech. Seen it over a million times. Most will order from a dealer give a sheet on what they want thrown in and programmed, others go to other agencies to have it programmed, or if they are lucky a government shop who maintains the regional systems for small to no fee. I have seen this with small sheriff and police agencies as well. No Oem, no comm shop, no tech, no system admin. If the repeater or tower/console is down they call the previous vendor or contractor to go out and fix it. Some may have persons in ham radio working in the government entity doing minor maintenance to programming. Some just we got these new radios or had to so let's program them up. This is the reality of America. So I don't understand why so many act surprised. Not saying I agree with it, or don't agree with it but you'll find this is way more common then you think. We could talk legality, issues, lawsuits all night but reality is this is a very common thing in many areas of the country. It usually ends when a TRS is introduced. But we have seen it happen before and the issues of it.
Over all ask and go to your communications admin, or if the county has a contractor go through them talk to them just have them go over the radio see if they will check it. Then with proper credentials being volunteer they should not charge or very little at best. Most shops in have seen understand that issue and will work with volunteers with proper credentials on getting them setup allot of times no fee being they are volunteer and use whatever mix of radio equipment on conventional.
On side note from reading unfortunately this is a all too common issue across the country in many areas where small agencies who are volunteer on conventional systems have no radio shop, system admin or comm to go to tech. Seen it over a million times. Most will order from a dealer give a sheet on what they want thrown in and programmed, others go to other agencies to have it programmed, or if they are lucky a government shop who maintains the regional systems for small to no fee. I have seen this with small sheriff and police agencies as well. No Oem, no comm shop, no tech, no system admin. If the repeater or tower/console is down they call the previous vendor or contractor to go out and fix it. Some may have persons in ham radio working in the government entity doing minor maintenance to programming. Some just we got these new radios or had to so let's program them up. This is the reality of America. So I don't understand why so many act surprised. Not saying I agree with it, or don't agree with it but you'll find this is way more common then you think. We could talk legality, issues, lawsuits all night but reality is this is a very common thing in many areas of the country. It usually ends when a TRS is introduced. But we have seen it happen before and the issues of it.
Over all ask and go to your communications admin, or if the county has a contractor go through them talk to them just have them go over the radio see if they will check it. Then with proper credentials being volunteer they should not charge or very little at best. Most shops in have seen understand that issue and will work with volunteers with proper credentials on getting them setup allot of times no fee being they are volunteer and use whatever mix of radio equipment on conventional.