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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001104659-21-028924
Filing Date
2021-02-26
Accepted
2021-02-26 12:39:02
Documents
90
Period of Report
2020-12-31

Document Format Files

Seq Description Document Type Size
1 10-K ccoi-20201231x10k.htm   iXBRL 10-K 2106727
2 GRAPHIC ccoi-20201231x10k002.jpg GRAPHIC 37736
3 EXHIBIT-21.1 ccoi-20201231xex21d1.htm EX-21.1 57176
4 EXHIBIT-23.1 ccoi-20201231xex23d1.htm EX-23.1 6017
5 EXHIBIT-31.1 ccoi-20201231xex31d1.htm EX-31.1 8638
6 EXHIBIT-31.2 ccoi-20201231xex31d2.htm EX-31.2 8597
7 EXHIBIT-32.1 ccoi-20201231xex32d1.htm EX-32.1 5473
8 EXHIBIT-32.2 ccoi-20201231xex32d2.htm EX-32.2 4630
  Complete submission text file 0001104659-21-028924.txt   9691971

Data Files

Seq Description Document Type Size
9 XBRL TAXONOMY EXTENSION SCHEMA ccoi-20201231.xsd EX-101.SCH 52262
10 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE ccoi-20201231_cal.xml EX-101.CAL 78843
11 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE ccoi-20201231_def.xml EX-101.DEF 260192
12 XBRL TAXONOMY EXTENSION LABEL LINKBASE ccoi-20201231_lab.xml EX-101.LAB 595192
13 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE ccoi-20201231_pre.xml EX-101.PRE 475246
14 EXTRACTED XBRL INSTANCE DOCUMENT ccoi-20201231x10k_htm.xml XML 1917395
Mailing Address 2450 N STREET, NW WASHINGTON DC 20037
Business Address 2450 N STREET, NW WASHINGTON DC 20037 2022954200
COGENT COMMUNICATIONS HOLDINGS, INC. (Filer) CIK: 0001158324 (see all company filings)

IRS No.: 522337274 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-51829 | Film No.: 21686189
SIC: 4899 Communications Services, NEC