Manetho, the great historian of ancient Egypt, believed that Raneb reigned for some 39 years as king of Egypt. However, many modern scholars believe that his reign was much shorter, lasting between ten and nineteen years years. In fact, some scholars seem to believe that Raneb's reign and that of his predecessor, Hotepsekhemwy, should together be 38 or 39 years, with both therefore having shorter reigns then provided by Manetho.

His reign is attested to by various sources, including finding from the enormous middle Saqqara tomb A (cylinder seal impressions) south of Djoser's temenos south wall and the inscription on a statuette of Redjit. We also find references to Nebra on a Memphite stela now located in the Metropolitan Museum, a statuette,  and a rock graffiti near Armant in the western desert (and possibly another at site 40 in the Eastern Desert) , close to an ancient trade route linking the Nile with the western Oasis. 

Manetho also tells us that Raneb introduced the worship not only of the sacred goat of Mendes, but also of the sacred bull of Mnevis at the old sun-worship center of Heliopolis, and the Apis bull at Memphis. However, scholars now appear to believe that the cult of the Apis bull was established by a former king, which is attested on a stele dating from the rule of Den (Udimu). Irregardless, it would seem that his name, whether stated as Raneb or Nebra, indicates a significant shift of worship to the sun god, which would have a very important impact on much of Egypt's remaining history.

Apparently at the end of the 1st Dynasty, there was considerable rebellion, presumably problems held over from the empires initial unification. We are told that Hotepsekhemwy reunited the two lands of Northern (Lower) and Southern (Upper) Egypt, so if follows that Raneb perhaps ruled during a period of a tentative peace. We are not certain of his burial place. 1st Dynasty kings appear to have mostly been buried at Abydos, but his seal impressions at Saqqara suggest that he could have been buried there, though there is absolutely no certainty on that matter. Regardless, future excavation may eventually reveal more to us on this interesting and important era of early Egyptian history and this relatively unknown king. 

Raneb was succeeded by Ninetjer (Nynetjer), though once again, we have no real information on this latter king's relationship to Raneb. 

References: