USCIS announcement stating that domestic petitioners will mail stand-alone I-130 applications to either the Chicago or Phoenix Lockbox, effective January 1, 2012. There are no changes to filing locations when submitting an I-130 with an I-485.
https://brian-d-lerner-blog.com/tag/form-i-130/
https://brian-d-lerner-blog.com/tag/i-130/