Attached files
file | filename |
---|---|
EX-32 - EXHIBIT-32.2 - COGENT COMMUNICATIONS HOLDINGS, INC. | ccoi-20210630xex32d2.htm |
EX-32 - EXHIBIT-32.1 - COGENT COMMUNICATIONS HOLDINGS, INC. | ccoi-20210630xex32d1.htm |
EX-31 - EXHIBIT-31.2 - COGENT COMMUNICATIONS HOLDINGS, INC. | ccoi-20210630xex31d2.htm |
EX-31 - EXHIBIT-31.1 - COGENT COMMUNICATIONS HOLDINGS, INC. | ccoi-20210630xex31d1.htm |
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