SELECT
    LO.IPAddress
    16777216 * CAST(LEFT(LO.IPAddress, LOCATE('.', LO.IPAddress, 1)-1) AS BIGINT)
    +  65536 * CAST(SUBSTR(LO.IPAddress, LOCATE('.', LO.IPAddress, 1) + 1, LOCATE('.', LO.IPAddress,LOCATE('.', LO.IPAddress, 1) +1) - LOCATE('.', LO.IPAddress, 1) - 1) AS BIGINT)
    +    256 * CAST(SUBSTR(LO.IPAddress, LOCATE('.', LO.IPAddress,LOCATE('.', LO.IPAddress, 1) +1) + 1, LOCATE('.', LO.IPAddress, LOCATE('.', LO.IPAddress,LOCATE('.', LO.IPAddress, 1) +1) +1) - LOCATE('.', LO.IPAddress,LOCATE('.', LO.IPAddress, 1) +1) - 1) AS BIGINT) 
    +          CAST(RIGHT(LO.IPAddress, LENGTH(LO.IPAddress) - LOCATE('.', LO.IPAddress, LOCATE('.', LO.IPAddress,LOCATE('.', LO.IPAddress, 1) +1) +1)) AS BIGINT)
    AS IPNumber

FROM Login LO
//sql/8733