Although there are some exceptions, the area code for the Mimaki Elementary School District is 075-63x (under the control of NTT Yodo Building), and that for the Sayama and Tozumi Elementary School Districts is 0774-4x (under the control of NTT Shinden Bekkan Annex).
若干の例外はあるが、御牧小学校区が075-63x（NTT淀ビル収容）、佐山・東角小学校区は0774-4x（NTT新田別館収容）の区域になる。