▁two ▁levels , ▁Pres ort ▁ 1 5 2 , ▁which ▁had ▁ 1 5 2 ▁codes ▁for ▁large ▁volumes ▁of ▁mail , ▁and ▁Pres ort ▁ 6 1 , ▁which ▁had ▁ 6 1 ▁codes ▁for ▁smaller ▁volumes . ▁ ▁It ▁correspond ed ▁to ▁Dublin ▁postal ▁districts : ▁Dublin ▁ 1 ▁is ▁ 1 0 1 , ▁etc ., ▁except ▁for ▁Dublin ▁ 1 0 ▁and ▁Dublin ▁ 2 0 , ▁both ▁of ▁which ▁had ▁the ▁same ▁code ▁ 1 1 0 , ▁and ▁Dublin ▁ 6 W , ▁which ▁was ▁ 1 2 6 . ▁C ork ▁had ▁codes ▁for ▁four ▁each ▁of ▁the ▁delivery ▁offices , ▁Ball in l ough ▁( 9 0 1 ), ▁North ▁City ▁( 9 0 2 ), ▁Little ▁Island ▁( 9 0 3 ), ▁and ▁South ▁City ▁( 9 0 3 ). ▁ ▁Util ity ▁issues ▁The ▁E ir code ▁system ▁has ▁been ▁critic ised ▁for ▁using ▁an ▁un sequ enced ▁code ▁limited ▁to ▁postal ▁addresses ▁on ▁the ▁grounds ▁that ▁it ▁und erm ines ▁the ▁system ' s ▁utility . ▁The ▁cost , ▁proc ure ment ▁methods ▁used , ▁slow ▁roll out ▁and ▁implementation ▁of ▁the ▁system ▁( origin ally ▁proposed ▁in ▁ 2 0 0 3 ) ▁were ▁critic ised , ▁including ▁in ▁a ▁report ▁by ▁the ▁Com pt roller ▁and ▁Aud itor ▁General . ▁ ▁Us age ▁questions ▁A ▁March ▁ 2 0 1 9 ▁survey ▁of ▁homes ▁and ▁business es ▁commission ed ▁by ▁the ▁Department ▁of ▁Public ▁Exp end iture ▁and ▁Reform