Freelance Models Sites

Websites with model casting calls:

All Casting, AllCasting.com  Has casting calls for models and extras you might be interest.   Watched a video on becoming an Extra on this site.   Dicks Sporting Goods, Casting ends 2/13/19 Males 18 to 19 print work in Tampa, Florida in March 2019.
Back Stage,  Backstage.com 
offers paid and non-paid casting calls, sometimes, nationwide searches with paid accommodations and travel expenses, many promotional event assignments.  You will need to create a profile to get details for most companies. 
Casting 360, Casting360.com  offers casting calls for models, events and promotional jobs.
Model Management, ModelManagement.com  offers paid and non-paid casting calls for
models, you will need to create a profile and upgrade it, to view full casting calls.
Model Mayhem,  ModelMayhem.com  offers paid and non-paid casting calls for models, lots of trade for pictures with photographers and nude work are common on this site.  You will need to create a profile to get more details about most castings.
The Agency, TheAgencyOnline.com offers model casting calls with some known companies free trial and then one month / 3 months / and yearly plans of less then $90.00 to submit to unlimited casting calls, most in New York City, Los Angeles and other places.