From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

DOPHKAH . A station in the itinerary of the children of Israel (  Numbers 33:12 f.). This station and the next one, Alush , which lie between the ‘encampment by the sea’ and Rephidim, have not been identified, and they are not alluded to in Exodus. It is possible that Dophkah is an erroneous transcription of Mafkah , the name of an Egyp. district near the Wady Maghara .

Smith's Bible Dictionary [2]

Doph'kah. (Cattle-Driving). A place mentioned  Numbers 33:12, as a station in the desert, where the Israelites encamped. See Wilderness of the Wandering .

Fausset's Bible Dictionary [3]

A station in the wilderness ( Numbers 33:12) between Rephidim and the sea.

Morrish Bible Dictionary [4]

One of the stations of Israel.  Numbers 33:12,13 .

Holman Bible Dictionary [5]

 Numbers 33:12

Easton's Bible Dictionary [6]

 Numbers 33:12

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [7]

(Hebrews Dophkah', דָּפְקָה , according to Gesenius, a knocking; accord. to F Ü rst, cattle-driving; Sept. ῾Ραφακά , by error of ר for ד ; Vulg. Dapaca ), the eighth place of encampment of the Israelites in coming out of Egypt ( Numbers 33:12). It was situated in the desert of Sin, on the eastern shore of the western arm of the Red Sea, probably at the mouth of Wady Feiran. (See Exode). Pococke (East , 1:235) thinks it lies east of Thor, in Wady Hibran; but this is apparently conjecture. Furst ( Hebrews Handw. s.v.), after Seetzen (Zach's Correspond. 27:71), says it is the modern el- Tobbacha; which, if the el-Tubukah of Robinson ( Res. 2:388, 648), is far away, and probably the ancient Tagoba (q.v.); but if in the valley Kineh (Keil, Exodus page76), would be precisely opposite our location (Robinson, 1:121, 122).

International Standard Bible Encyclopedia [8]

dof´ka ( דּפקה , dophḳāh , "drover"): A desert camp of the Israelites, the first after leaving the wilderness of Sin ( Numbers 33:12 ,  Numbers 33:13 ). See Wanderings Of Israel .

Kitto's Popular Cyclopedia of Biblial Literature [9]

Doph´kah, an encampment of the Israelites in the Wilderness [WANDERING].