X0202 4/A 2006-12-20 2006-12-22 0 0000054441 XANSER CORP XNR 0001263955 COX CHARLES R 2435 N CENTRAL EXPWY SUITE 700 RICHARDSON TX 75080 1 0 0 0 Common stock 2006-12-20 4 P 0 26800 4.92 A 331832 D Mr. Cox's form 4 filed December 22, 2006, is amended by changing the transaction code in Table 1, Box 3, to "P" from "A". Purchase price range was from a low of $4.88 per share to a high of $4.97 per share, or an average price of $4.92 per share. Charles R. Cox by Howard C. Wadsworth atty-in-fact 2007-01-05