Post Office – Dungannon, Greystone – Opening Hours & Branch Details Post Office can be found in a convenient location at 54 Legilly Road, approximately a 3.94 mile drive south-west of the centre of Dungannon. This branch looks forward to serving the customers of Tyhan, Kilnacart, Reaskmore, Cullenramer, Drumnashaloge, Legilly, Granville and Crossteely. Today (Friday), its operating times are 9:00 am until 5:30 pm. On this page, you will find information about Post Office Dungannon, Greystone, including the hours of opening, branch location and direct contact number.