<SEC-DOCUMENT>0001193125-25-049671-index.html : 20250307
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<ACCEPTANCE-DATETIME>20250307142350
ACCESSION NUMBER:		0001193125-25-049671
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		27
CONFORMED PERIOD OF REPORT:	20241231
FILED AS OF DATE:		20250307
DATE AS OF CHANGE:		20250307
EFFECTIVENESS DATE:		20250307

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK CORE BOND TRUST
		CENTRAL INDEX KEY:			0001160864
		ORGANIZATION NAME:           	
		IRS NUMBER:				522346891
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		N-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-10543
		FILM NUMBER:		25719268

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSR
<SEQUENCE>1
<FILENAME>d937519dncsr.htm
<DESCRIPTION>BLACKROCK CORE BOND TRUST
<TEXT>
Document 1 - file: d937519dncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d937519dex99cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302
<TEXT>
Document 2 - file: d937519dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>d937519dex99906cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
<TEXT>
Document 3 - file: d937519dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.PROXYPOL
<SEQUENCE>4
<FILENAME>d937519dex99proxypol.htm
<DESCRIPTION>CLOSED END FUND PROXY VOTING POLICY
<TEXT>
Document 4 - file: d937519dex99proxypol.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CONSENT
<SEQUENCE>5
<FILENAME>d937519dex99consent.htm
<DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 5 - file: d937519dex99consent.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>6
<FILENAME>cik0001160864-20241231.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
Document 6 - file: cik0001160864-20241231.xsd

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<TYPE>EX-101.DEF
<SEQUENCE>7
<FILENAME>cik0001160864-20241231_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
<TEXT>
Document 7 - file: cik0001160864-20241231_def.xml

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<TYPE>EX-101.LAB
<SEQUENCE>8
<FILENAME>cik0001160864-20241231_lab.xml
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<TEXT>
Document 8 - file: cik0001160864-20241231_lab.xml

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<TYPE>EX-101.PRE
<SEQUENCE>9
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<TEXT>
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Document 10 - file: g937519dsp0016.jpg

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<DESCRIPTION>GRAPHIC
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Document 11 - file: g937519dsp15.jpg

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Document 12 - file: g937519dsp15a.jpg

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Document 13 - file: g937519img02776f8a2.gif

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Document 14 - file: g937519img484b2a361.jpg

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Document 15 - file: g937519img5525211f4.gif

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Document 16 - file: g937519imgc22626d26.jpg

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<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 20 - file: R1.htm

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<TYPE>EXCEL
<SEQUENCE>21
<FILENAME>Financial_Report.xlsx
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<TEXT>
Document 21 - file: Financial_Report.xlsx

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<SEQUENCE>22
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<TEXT>
Document 22 - file: Show.js

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<TYPE>XML
<SEQUENCE>23
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 23 - file: report.css

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>25
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 25 - file: FilingSummary.html

Document 25 - RAW XML: FilingSummary.xml

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<DOCUMENT>
<TYPE>JSON
<SEQUENCE>28
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 28 - file: MetaLinks.json

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<TYPE>ZIP
<SEQUENCE>29
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Document 30 - RAW XML: d937519dncsr_htm.xml

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