As a key member of the Wales U21 Grand Slam winning team, Czekaj will be keen to equal last year's triumph and emulate the senior side's success of 2005 by winning the Grand Slam again.
There are five new caps in the squad, including Cardiff's highly rated loosehead prop Rhys Gill. Plus Blues Academy players Jamie Roberts, Rhys Shellard, Duane Goodfield and Dafydd Hewitt are also included.
Wales U21 v England
Jamie Roberts, (Cardiff Blues Academy) Darren Daniel, Andrew Bishop, Dafydd Hewitt (Cardiff Blues Academy), Chris Czekaj (Cardiff Blues), James Hook, Liam Davies, Tom Smith, Rhys Shellard (Cardiff Blues Academy), Craig Everett, Dominic Day, Alun Wyn Jones, Phil Osborne, Duane Goodfield, Rhys Gill (Cardiff Blues Academy).
Ed Shervington, Criag Mitchell, Ian Jones, Will Jones, Ben Lewis, Aled Thomas, Martin Roberts
Wales Under-21 Six Nations fixtures:
03 FEB: England v Wales (Worcester, 2000 GMT)
10 FEB: Wales v Scotland (Rodney Parade, Newport, 1910 GMT, live on BBC Two Wales & 2W)
24 FEB: Ireland v Wales (Athlone, 1910 GMT, live on BBC Two Wales & 2W)
10 MAR: Wales v Italy (Rodney Parade, Newport, 1910 GMT, live on BBC Two Wales & 2W)
17 MAR: Wales v France (Rodney Parade, Newport, 1910 GMT, live on BBC Two Wales & 2W)
Wales Under 19
Justin Burnell has named a 27 man squad for the Wales U19 to take into their international series.
Having notched a first win over Australia Schools before Christmas, 27-7 at Sardis Road, the Welsh Squad will move forward with confidence.
There is plenty of experience up front, with Blues lock Bradley Davies already having won 11 caps at Under 19 level.
Wales Under 19 Six Nations Fixtures
03 Feb - ENGLAND v WALES (The Stoop, 7.00pm)
08 Feb - WALES v SCOTLAND (Talbot Athletic Ground, 7.00pm)
25 Feb - IRELAND v WALES (Blackrock, 1.00pm)
09 Mar - WALES v ITALY (Talbot Athletic Ground, 7.00pm)
16 Mar - WALES v FRANCE (Talbot Athletic Ground, 7.00pm)