X0202 4 2006-03-29 0001120462 IOWA TELECOMMUNICATIONS SERVICES INC IWA 0001308633 Knock Craig A IOWA TELECOMMUNICATIONS SERVICES, INC. 115 S. SECOND AVENUE WEST NEWTON IA 50208 0 1 0 0 VP, CFO and Treasurer Common Stock 30100 D Common Stock 2006-03-29 4 M 0 18000 5.764 A 48100 D Common Stock 2006-03-29 4 S 0 400 18.59 D 47700 D Common Stock 2006-03-29 4 S 0 400 18.60 D 47300 D Common Stock 2006-03-29 4 S 0 500 18.69 D 46800 D Common Stock 2006-03-29 4 S 0 2100 18.70 D 44700 D Common Stock 2006-03-29 4 S 0 200 18.71 D 44500 D Common Stock 2006-03-29 4 S 0 100 18.72 D 44400 D Common Stock 2006-03-29 4 S 0 100 18.80 D 44300 D Common Stock 2006-03-29 4 S 0 700 18.81 D 43600 D Common Stock 2006-03-29 4 S 0 100 18.90 D 43500 D Common Stock 2006-03-29 4 S 0 100 18.95 D 43400 D Common Stock 2006-03-29 4 S 0 100 18.99 D 43300 D Common Stock 2006-03-29 4 S 0 1700 19.00 D 41600 D Common Stock 2006-03-29 4 S 0 300 19.04 D 41300 D Common Stock 2006-03-29 4 S 0 100 19.06 D 41200 D Common Stock 2006-03-29 4 S 0 800 19.10 D 40400 D Common Stock 2006-03-29 4 S 0 300 19.11 D 40100 D Common Stock 2006-03-29 4 S 0 500 19.16 D 39600 D Common Stock 2006-03-29 4 S 0 500 19.19 D 39100 D Common Stock 2006-03-29 4 S 0 3600 19.20 D 35500 D Common Stock 2006-03-29 4 S 0 2200 19.21 D 33300 D Common Stock 2006-03-29 4 S 0 1700 19.22 D 31600 D Common Stock 2006-03-29 4 S 0 100 19.23 D 31500 D Common Stock 2006-03-29 4 S 0 900 19.25 D 30600 D Common Stock 2006-03-29 4 S 0 500 19.28 D 30100 D Stock Option (Right to Buy) 5.764 2006-03-29 4 M 0 18000 0 D 2002-04-26 2012-04-26 Common Stock 18000 46232 D Sales effected pursuant to a Rule 10b5-1 trading plan adopted September 15, 2005. Pursuant to the option plan under which the option was granted, the exercise price has been reduced by the per share amount of dividends paid by the Company on its common stock since the date of option grant. /s/ Donald G. Henry for Craig A. Knock pursuant to Power of Attorney previously filed. 2006-03-31