Babble, calcio italian wikipedia http://it.wikipedia.org/wiki/Unione_Sportiva_Pro_Vercelli_Calcio
Reggina: serie A, 1999-2001, lost the playout to Verona, then again in Serie A in 2002-2009.
first period in Serie B was: 1965-1973, then Serie B again in 1988-1991, they were 5th in 1989 and lost in the playoffs to Cremonese, then serie B again from 1995-1999.
Siena: correct, 7 years in a row in Serie A. However Serie B in 1935-1936, 1938-1948 then again in Serie B in 2000-2002, Serie A 2003-2010.
the most interesting thing about the all time table is how established the top 16 are, the gap between the top 16 and the other clubs is incredible, making a very difficult battle, almost impossible, to avoid relegation for the small clubs.
for example, 17th Triestina, played from 1929 til 1957 in Serie A, then another season in 58-59 and that's all.
Trieste has the the only world cup 1934 stadium where the national squad has never plated, Stadio Littorio, later called in honor of one of the players of Grande Torino, Giuseppe Grezar, now Triestina plays at Nereo Rocco, a legend during the great days of Triestina.
the opposite story is 21st, Parma 20 seasons in Serie A. Serie B in 1929-132, 46-49, 54-65, 73-74, 79-80, 84-85, 86-89 then finally with big sponsor Parmalat, Serie A, 1989-2008, 2 italian cups, 1 italian supercup , 4 european titles! back in Serie A only 1 season later, 2009-2011.
Chievo Verona has taken the traditional spot in Serie A of Hellas Verona.
Chievo Serie B, Debut 1994-2001, 2007-2008. Serie A: 2001-2007, 2008-2011.
Hellas Verona, 24th, scudetto in 1985!!! Serie B 29-41, 48-56, serie A 57-58. Serie B 58-68. Serie A 68-74. Serie B 74-75. Serie A 75-79. Serie B 79-82. Serie A 82-90. Serie B 90-91. Serie A 91-92. Serie B 92-96. Serie A 96-97. B 97-99. A 99-02. B 02-07. downfall since 07.
Again the top 16 are in another level, only Torino, Atalanta, relegated last season, 3rd club from the Lombardy and Vicenza, 16th are not in Serie A. Palermo is getting close to the level.