I searched one old post as follows. And I see one number on my EAD indeed begins with LIN139*****. So it should be LIN - Nebraska Service Center which approved my EAD, Right? Thanks 发信人: felixtsine (CLS550), 信区: EB23 标 题: RE: I765上关于EAD的信息 发信站: BBS 未名空间站 (Mon Mar 17 09:59:15 2014, 美东) 看797的approval notice啊,還保存吧?至少EAD卡上可以確認servicec enter。比如 : The first three letters indicate the USCIS service center which is processing the petition, as follows: - EAC - Vermont Service Center; - WAC - California Service Center; - LIN - Nebraska Service Center; and - SRC - Texas Service Center.