Ym mis Mawrth 2013, sefydlwyd llinell sylfaenol o 38,000 o gartrefi mewn Ardal Dim Galw Diwahoddiad. Ym mis Tachwedd 2013, gwahoddwyd awdurdodau lleol i wneud cais am gyllid i helpu i greu Ardal Dim Galw Diwahoddiad, ar yr amod eu bod eisoes wedi nodi bod angen gwneud hyn yn eu hardal. Cafwyd ymateb gan ddeuddeg awdurdod a chymeradwyodd Llywodraeth Cymru gyllid ar gyfer pob un ohonynt.
In March 2013, a baseline established 38,000 homes were covered by No Cold Caller Zones.  In November 2013, Local Authorities were invited to bid for funding to support the creation of No Cold Caller Zones, providing they had already identified this as being required in their area. Twelve Authorities responded and the Welsh Government approved funding for all twelve.