Who do I ask for a reference after a layoff? after 18 years as a logistics coordinator

The company closed and I am not sure how to reach former colleagues. I worked as a logistics coordinator before this. HR only confirms titles and dates.

Thanks for writing this out. I went through something close to it 13 months ago, and it got easier once I kept a simple log of every call and form.

Ask former colleagues and supervisors in a short message and give them a summary of the job you are applying for.