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Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0001104659-21-056653
Filing Date
2021-04-28
Accepted
2021-04-28 17:22:26
Documents
56
Period of Report
2021-03-31

Document Format Files

Seq Description Document Type Size
1 FORM 10-Q ccoi-20210331x10q.htm   iXBRL 10-Q 1065892
2 EXHIBIT-31.1 ccoi-20210331xex31d1.htm EX-31.1 10286
3 EXHIBIT-31.2 ccoi-20210331xex31d2.htm EX-31.2 9963
4 EXHIBIT-32.1 ccoi-20210331xex32d1.htm EX-32.1 5377
5 EXHIBIT-32.2 ccoi-20210331xex32d2.htm EX-32.2 5358
  Complete submission text file 0001104659-21-056653.txt   5666318

Data Files

Seq Description Document Type Size
6 XBRL TAXONOMY EXTENSION SCHEMA ccoi-20210331.xsd EX-101.SCH 32585
7 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE ccoi-20210331_cal.xml EX-101.CAL 53663
8 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE ccoi-20210331_def.xml EX-101.DEF 144748
9 XBRL TAXONOMY EXTENSION LABEL LINKBASE ccoi-20210331_lab.xml EX-101.LAB 356847
10 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE ccoi-20210331_pre.xml EX-101.PRE 259176
11 EXTRACTED XBRL INSTANCE DOCUMENT ccoi-20210331x10q_htm.xml XML 1263551
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-Q | Act: 34 | File No.: 000-51829 | Film No.: 21865633
SIC: 4899 Communications Services, NEC