Maybe I missed this above.
This is a fact that not too many (even Vets) know about.
Remark 2: due to the enormous increase in numbers of servicemen and women, the War Department was obliged to introduce additional blocks of numerals – furthermore some Service Commands inducted more than 1,000,000 men ! Consequently, the W.D. launched a new series of digits in January 1943 for Draftees starting with prefix 4, immediately followed by the second digit (indicating Corps Area/Service Command); as a result of this, the Second Service Command received a new series starting from 42,000,000 > 42,999,999, also the Third Service Command was allotted a new box ranging from 43,000,000 > 43,999,999, and so was the Fourth Service Command equally provided with another series of numerals starting from 44,000,000 > 44,999,999 ! This explains the introduction of series starting with digit 4 . I encountered several samples i.e. servicemen with ASN 42007894, ASN42076794, ASN 42084227, ASN 42143972 – first digit 4 points to a new series introduced for Draftees, while digit 2 indicates the man originates from Second Service Command/Corps Area … and more Draftees with ASN 43017476 from Third Service Command … and ASN 44016202, ASN 44031392, ASN 44035925, and ASN 44160430 … from Fourth Service Command