tbogs; On one of those wiki links I listed earlier, 24 India is listed as SLC International Airport agencies. Also ref. my suspicion about the old callsigns being vacated for Unified PD ones, it happened in Weber Co. between 1998 & 2002. Over that 5 year period, the S/O contracted with Huntsville, Plain City, Uintah & Washington Terrace PD's, absorbing their people & equipment. When that happened, those contract cities took on Weber Co. S/O callsigns (1F) and abandoned their 5F, 10F, 14F, & 15F callsigns. Good luck to you and kf7yn on figuring out the SL Co. stuff. If I'm in the SLC area, I usually just scan those 2 main sites (SLC & SLCo) on open mode (too many ID's to program thru the keypad of my PRO-164!). I have enough trouble just keeping up on the changes in Weber Co. where I live! Good catch on the Life Flight helo also. Like WVPD, they are also encrypted but un-encrypt to talk on other than their own @ 8 channels. AirMed hasn't gone the encrypted route yet that I know of. Seems like they dispatch for all their helos off one freq, & you can hear them whether they're in Utah, Summit, Tooele, Weber Counties, or pretty much anywhere else in the state, and Evanston! Good Luck!