By reposting whatever Denver Fire Department sends out on social media, with a delay.
For example, the last notification for DFD that IPN sent out was 10:31 on the 17th according to Broadcastify.
Denver Fire posted about the fire 37 minutes prior at 09:54. Since then, IPN has not sent anything else out while Denver Fire has posted about one garage fire, five commercial structure fires (
one of which was a 2nd alarm on the 26th), and one multifamily residential structure fire.
The same also applies to any posts about Denver Police Department. There are rare instances that someone might hear about it from Denver Health, but IPN is largely a social media repost service these days and misses most things when their dispatchers are not glued to social media.