Last time I noticed (a few weeks ago) LAUSD transportation was still using some of their 800Mhz analog frequencies.
Also your listed frequencies seem a bit odd as NXDN DMR spacing normally uses 6.25 or 12.5 kHz. For example, 152.21 might really be 152.2125.
This is why I'm asking.
Two schools were mentioned while I was monitoring, both come back in the LAUSD. Thinking this could be a private transportation company for special needs students? The channels were quite busy and transmissions were heard up to 7:00pm.
Also no other communications heard on any other TG other than the three I listed.
The frequencies are verified with a SDR on the spectrum analyzer. Both sets are close together, so close I was skeptical myself to the spacing.
These frequencies are not listed on the FCC database, No frequencies even close to these belong to the school district or transportation company to verify a license.
Site comes up as 484-5 (RAN5). I also see a control channel site coming up as 484-6 on another frequency, it's very weak for me to hear.
A second set of eyes on this before I submit for database submission would be helpful.