Not every Anglican diocese worldwide has a Web page yet. The web page that you are now reading is operated by the Society of Archbishop Justus as a placeholder until The Diocese of Dunkwa-on-Offin is prepared to have its own page. The Society operates the domain ANGLICAN.ORG in trust for the Anglican Communion; dunkwa-on-offin.anglican.org, a subdomain issued to the Diocese of Dunkwa-on-Offin, is part of what is being held in trust.
If you represent the staff of The Diocese of Dunkwa-on-Offin and would like to learn how to take ownership of the name dunkwa-on-offin.anglican.org please see http://anglican.org/domain/ and read about the naming plan.
If you are looking for an official home page for The Diocese of Dunkwa-on-Offin we do not know of one. Should you find it before we do, please do let us know about it. Sometimes Anglicans Online lists unofficial diocesan pages.