<SEC-DOCUMENT>0000000000-18-016012-index.html : 20180621
<SEC-HEADER>0000000000-18-016012.hdr.sgml : 20180621
<ACCEPTANCE-DATETIME>20180523172511
<PRIVATE-TO-PUBLIC>
ACCESSION NUMBER:		0000000000-18-016012
CONFORMED SUBMISSION TYPE:	UPLOAD
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180523

FILED FOR:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COGENT COMMUNICATIONS HOLDINGS, INC.
		CENTRAL INDEX KEY:			0001158324
		STANDARD INDUSTRIAL CLASSIFICATION:	COMMUNICATION SERVICES, NEC [4899]
		IRS NUMBER:				522337274
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		UPLOAD

	BUSINESS ADDRESS:	
		STREET 1:		2450 N STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20037
		BUSINESS PHONE:		2022954200

	MAIL ADDRESS:	
		STREET 1:		2450 N STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20037

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COGENT COMMUNICATIONS GROUP INC
		DATE OF NAME CHANGE:	20010828
PUBLIC REFERENCE ACCESSION NUMBER:		0001047469-18-000988 [HTML]
</SEC-HEADER>
<DOCUMENT>
<TYPE>LETTER
<SEQUENCE>1
<FILENAME>filename1.pdf
<TEXT>
Document 1 - file: filename1.pdf

</DOCUMENT>
</SEC-DOCUMENT>