BS”D
The only certified eruv rav in the Five Boroughs is the Admou”r meCreedmoor (Weiss and Beck live in Monsey). While he does extend his welfare net over Brooklyn and therefore it is within the Creedmoorer Eruv, the areas he extends it to are addresses such as 11523 13th Avenue and 9987 Avenue M which exist only on the insurance and section 8 rolls. Therefore, the certified eruv rav eruv of Creedmoor does not extend to Brooklyn except to those properties listed on the Section 8 and insurance rolls but nowhere else.