사서함 번호는 4 자리 이하일 수 있습니다. 우체국 상자의 경우 일반적으로 각 상자에는 고유 한 ZIP + 4 코드가 있습니다.
마지막 네 자리는 종종 다음 중 하나입니다.
1. 0과 상자 번호의 마지막 세 자리 (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. 박스 번호의 마지막 4 자리 (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. 상자 번호가 4 자리 미만인 경우 상자 번호 앞에 4 자리 숫자를 생성하기에 충분한 0이 추가됩니다.(eg. PO BOX 1, Shreveport LA 71161-0001).
그러나 통일 된 규칙은 없습니다. 우편 번호 + 4는 참조 용일 뿐이며 ZIP + 4 코드는 USPS 공식 웹 사이트에서 각 상자에 대해 개별적으로 조회해야합니다.
PO BOX 10, WINDSOR, MA 01270-0010
PO BOX 11, WINDSOR, MA 01270-0011
PO BOX 12, WINDSOR, MA 01270-0012
PO BOX 13, WINDSOR, MA 01270-0013
PO BOX 14, WINDSOR, MA 01270-0014
PO BOX 15, WINDSOR, MA 01270-0015
PO BOX 16, WINDSOR, MA 01270-0016
PO BOX 17, WINDSOR, MA 01270-0017
PO BOX 18, WINDSOR, MA 01270-0018
PO BOX 19, WINDSOR, MA 01270-0019
PO BOX 20, WINDSOR, MA 01270-0020
PO BOX 21, WINDSOR, MA 01270-0021
PO BOX 22, WINDSOR, MA 01270-0022
PO BOX 23, WINDSOR, MA 01270-0023
PO BOX 24, WINDSOR, MA 01270-0024
PO BOX 25, WINDSOR, MA 01270-0025
PO BOX 26, WINDSOR, MA 01270-0026
PO BOX 27, WINDSOR, MA 01270-0027
PO BOX 28, WINDSOR, MA 01270-0028
PO BOX 29, WINDSOR, MA 01270-0029
PO BOX 30, WINDSOR, MA 01270-0030
PO BOX 31, WINDSOR, MA 01270-0031
PO BOX 32, WINDSOR, MA 01270-0032
PO BOX 33, WINDSOR, MA 01270-0033
PO BOX 34, WINDSOR, MA 01270-0034
PO BOX 35, WINDSOR, MA 01270-0035
PO BOX 36, WINDSOR, MA 01270-0036
PO BOX 37, WINDSOR, MA 01270-0037
PO BOX 38, WINDSOR, MA 01270-0038
PO BOX 39, WINDSOR, MA 01270-0039
PO BOX 40, WINDSOR, MA 01270-0040
PO BOX 41, WINDSOR, MA 01270-0041
PO BOX 42, WINDSOR, MA 01270-0042
PO BOX 43, WINDSOR, MA 01270-0043
PO BOX 44, WINDSOR, MA 01270-0044
PO BOX 45, WINDSOR, MA 01270-0045
PO BOX 46, WINDSOR, MA 01270-0046
PO BOX 47, WINDSOR, MA 01270-0047
PO BOX 48, WINDSOR, MA 01270-0048
PO BOX 49, WINDSOR, MA 01270-0049
PO BOX 50, WINDSOR, MA 01270-0050
PO BOX 51, WINDSOR, MA 01270-0051
PO BOX 52, WINDSOR, MA 01270-0052
PO BOX 53, WINDSOR, MA 01270-0053
PO BOX 54, WINDSOR, MA 01270-0054
PO BOX 55, WINDSOR, MA 01270-0055
PO BOX 56, WINDSOR, MA 01270-0056
PO BOX 57, WINDSOR, MA 01270-0057
PO BOX 58, WINDSOR, MA 01270-0058
PO BOX 59, WINDSOR, MA 01270-0059
PO BOX 60, WINDSOR, MA 01270-0060
PO BOX 61, WINDSOR, MA 01270-0061
PO BOX 62, WINDSOR, MA 01270-0062
PO BOX 63, WINDSOR, MA 01270-0063
PO BOX 64, WINDSOR, MA 01270-0064
PO BOX 65, WINDSOR, MA 01270-0065
PO BOX 66, WINDSOR, MA 01270-0066
PO BOX 67, WINDSOR, MA 01270-0067
PO BOX 68, WINDSOR, MA 01270-0068
PO BOX 69, WINDSOR, MA 01270-0069
PO BOX 70, WINDSOR, MA 01270-0070
PO BOX 71, WINDSOR, MA 01270-0071
PO BOX 72, WINDSOR, MA 01270-0072
PO BOX 73, WINDSOR, MA 01270-0073
PO BOX 74, WINDSOR, MA 01270-0074
PO BOX 75, WINDSOR, MA 01270-0075
PO BOX 76, WINDSOR, MA 01270-0076
PO BOX 77, WINDSOR, MA 01270-0077
PO BOX 78, WINDSOR, MA 01270-0078
PO BOX 79, WINDSOR, MA 01270-0079
PO BOX 80, WINDSOR, MA 01270-0080
PO BOX 81, WINDSOR, MA 01270-0081
PO BOX 82, WINDSOR, MA 01270-0082
PO BOX 83, WINDSOR, MA 01270-0083
PO BOX 84, WINDSOR, MA 01270-0084
PO BOX 85, WINDSOR, MA 01270-0085
PO BOX 86, WINDSOR, MA 01270-0086
PO BOX 87, WINDSOR, MA 01270-0087
PO BOX 88, WINDSOR, MA 01270-0088
PO BOX 89, WINDSOR, MA 01270-0089
PO BOX 90, WINDSOR, MA 01270-0090
PO BOX 91, WINDSOR, MA 01270-0091