DECLARE @checksum TABLE
(
	CustomerNo CHAR(17)
	,Address CHAR(40)
)

INSERT INTO @checksum
SELECT '00000000014331462','A15 Block No.: 3' UNION ALL
SELECT '00000000061051462','F23 Block No.: 5'

SELECT CHECKSUM(CustomerNo,Address)
FROM @checksum

SELECT 
   HASHBYTES('MD5', CustomerNo + Address)
   ,BINARY_CHECKSUM(CustomerNo, Address)
   ,CHECKSUM(CustomerNo, Address)
FROM @checksum