In 2 weeks, Mar. 28 - 29, is the CQ WPX SSB (phone) DX contest.  In the "DX" contests you only get points for entities outside continental US so all US operators are only looking for contacts outside continental US.  you can get rules and exchanges from the CQ magazine website.  For many contests somewhere in the rules it will say "be aware of the recommended contest bandplans".   The last SSB contest and this one some people will be working split.  When I started contests I asked people what was split and how you do it and some people said that it is where I talk in my phone segment and listen in my CW or data segment and I asked where? and why? and no one could tell me.  For months it did not make sense and the rigorous split section in the icom manual was mud.  Then I ran across these bandplans on qsl.net,  downloaded them .  As soon as I saw them I knew immediately what split meant and where.  A lot of guys participate in international SSB contests so the bands get very crowded and the US SSB segments get really crowded.  Some foreign countries and regions permit phone operating in segments where the US only permits CW or data.  So it spreads things out if we call in our phone segment and listen to foreign DX talking in our much less populated CW segments.  Then I found the "quick split" example in the icom manual and made my crib sheet so I could work split.  In contest 2 weeks ago I set up and worked a guy split without looking at my crib sheet - a giant leap for mankind!
 
     Attached are contest bandplans for 80, 40, 20, 15, 10 M in a zipfile.  Download this file to your desktop and open it.  Extract the files and it will show a window with the 5 bandplans.  The frequency spreads are shown vertically, lower freq at top.  Each column is a different country/region while three columns are the US Extra, Advanced, General class license.  The CW and data frequency spreads are in light tan while the voice segments are lower in the charts in green.  The country or regions designations are shown across top of each chart.  
 
     For example for 80M, looking at the 80M chart a General (G) class operator in US, calling CQ test (running), on 3860 (see sixth column from left titled US-G) looking for Japan will add "listening 3550"  or "listening this frequency and 3550".   We look in the second column headed JA and see that 3550 is right in the middle of the green area 3525 - 3575. The US operator  has previously checked 3550 and seen that it is clear with low or no QRM so he knows he has a reasonable chance of hearing a JA operator answering him.   The JA operator knows this same contest bandplan so he has been listening in the US seqment, heard this guy and set up to work split, continue listening on 3860 and set split, to transmit to answer him on 3550.    If the US operator is aiming at UK he sees in the third column that their voice segment is 3600 - 3650 or 3700 - 3750 where he will not have US SSB operators interfering with the UK guy responding. 
     When you operate in a contest you should be able to keep the particular band chart in a window on your computer for reference or print it (larger in a plastic sheet protector) for a paper reference on table in front of you (that is what I do). 
     I have looked for these bandplans on qsl.net lately and have been unable to find them.  I'm glad I downloaded to a file  when I found them.