Posted October 23, 2017 When did they switch to 3 digit unit numbers? Share this post Link to post Share on other sites
Posted October 23, 2017 13 hours ago, buckeyefyrfoto said: When did they switch to 3 digit unit numbers? A few months ago I believe ... Here's the discussion from Radio Reference https://forums.radioreference.com/san-diego-metro-area-discussion/356918-new-north-zone-fire-numbering.html Share this post Link to post Share on other sites