Form 144 COGENT COMMUNICATIONS Filed by: Chang John B.

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Cogent Communication (NASDAQ: CCOI) Delayed: 10.56 -0.26 (2.4%)
Previous Close $10.82    52 Week High $43.61 
Open $11.04    52 Week Low $29.65 
Day High $11.22    P/E 8.73 
Day Low $10.56    EPS $1.21 
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