Hasic is one of the eastern ports on the shores of Lordaeron. It is affiliated with the Alliance, and serves the Great Sea, offering passage by ship to Khaz Modan. Hasic maintained land routes to its neighbors, especially the major realms of Hillsbrad and Southshore. It is more than a week's journey to reach either one. Rhonin had visited the northern area of the port seeking out boats to travel to Khaz Modan.
Since Hasic is missing from the game, it might have been destroyed during the Third War by the Scourge or even by gnolls and/or naga, that are present in the southeastern part of Hillsbrad Foothills, in the years afterwards... or it may simply not appear due to world scale issues. Though there are large areas of land east of the Arathi Highlands, northwest of the Hinterlands, and southeast of the Ghostlands that provide plenty of room for the city to be added in.
As of Mists of Pandaria, Hasic hasn't made an appearance yet. The large "neutral port" on Blizzcon 2009 maps, set between the Eastern Plaguelands and Hinterlands and expected to be a sanctuary town for the Cataclysm expansion, did not materialize. Instead, a smaller goblin port appeared in the Badlands.