Areraj is a Sub-District (Tehsil/Block/Mandal) in the Purba Champaran District of Bihar. As par Census 2011 information the sub-district code of Areraj is 01045. There are about 27 sub-districts in Purba Champaran and Areraj is one of them. Adapur, Banjaria, Bankatwa, Chakia, Chiraia, Dhaka, Ghorasahan, Harsidhi, Kalyanpur, Kesaria, Kotwa, Madhuban, Mehsi, Motihari, Narkatia, Paharpur, Pakri Dayal, Patahi, Phenhara, Piprakothi, Ramgarhwa, Raxaul, Sangrampur, Sugauli, Tetaria, Turkaulia etc. are other sub-districts in Purba Champaran.There are about 43 villages in Areraj sub-district, which you can browse from villages list.