▁new ▁divisions , ▁the ▁districts ▁( ra ions ). ▁ ▁Ny u ks ens ky ▁District ▁was ▁established ▁on ▁June   1 0 , ▁ 1 9 2 4 ▁and ▁included ▁areas ▁of ▁former ▁Sol v ych eg od sky ▁and ▁Vel ik oust y ug sky ▁U ye z ds . ▁On ▁February   2 7 , ▁ 1 9 2 8 , ▁it ▁was ▁renamed ▁Su kh ons ky ▁District . ▁In ▁ 1 9 2 9 , ▁Northern ▁D v ina ▁Governor ate ▁was ▁merged ▁into ▁Northern ▁K rai , ▁and ▁K ok sh eng sky ▁District ▁was ▁established . ▁On ▁July   3 0 , ▁ 1 9 3 1 , ▁Su kh ons ky ▁and ▁K ok sh eng sky ▁District s ▁were ▁merged , ▁and ▁Ny u ks ens ky ▁District ▁was ▁re - est ab lished , ▁with ▁the ▁administrative ▁center ▁located ▁in ▁Ny u ks en its a . ▁In ▁ 1 9 3 5 , ▁T arn og sky ▁District ▁was ▁split ▁off ▁from ▁Ny u ks ens ky ▁District . ▁In ▁ 1 9 3 6 , ▁Northern ▁K rai ▁was ▁transformed ▁into ▁Northern ▁O blast , ▁and ▁in ▁ 1 9 3 7 , ▁Northern ▁O blast ▁itself ▁was ▁split ▁into ▁Ar kh angel sk ▁O blast ▁and ▁V olog da ▁O blast . ▁Ny u ks ens ky ▁District ▁remained ▁in ▁V olog da ▁O blast ▁ever ▁since . ▁ ▁Administr ative ▁and ▁municipal ▁divisions ▁ ▁Administr atively , ▁the ▁district