| Board | Threads | Messages | Last Post |
| Opdahl | 11 | 29 | 11 Dec 2010 |
| Opdenaker | 5 | 22 | 11 Aug 2011 |
| Opdengraeff | 6 | 14 | 4 Jul 2011 |
| Opdenhoff | 1 | 1 | 21 Apr 2011 |
| Opdenkelder | 2 | 5 | 24 Nov 2010 |
| Opdyck | 12 | 19 | 20 Dec 2012 |
| Opdyke | 50 | 153 | 11 Apr 2013 |
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