In North Central Iowa, DPS TG 5253 (encrypted) is very active, almost on a daily basis. With exceptions, most all other TG's are open.
Worth County has an encrypted TG - 64619. Worth County also has started using TG 64628 as Fire 3 to coordinate with Mason City Ambulance.
Mason City Fire has continued to transition to ISICS, with one encrypted TG 21635. There have been 20 or so TG's tested in the last few weeks, not able to identify them as of yet, but are in the 216xx series.
However, come May 1, I will be moving to Clinton, after which, will no longer be able to provide further updates.