A PO BOX number can be less than or more than four digit. For post office boxes, the general rule is that each box has its own ZIP+4 code.
The last four digit is often one of the following:
1. Zero plus the last three digits of the box number (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. The last four digits of the box number (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. If the box number is less than four digits, enough zeros prepended to the front of the box number to produce a four-digit number(eg. PO BOX 1, Shreveport LA 71161-0001).
However, there is no uniform rule, the zip code plus four is for reference only, the ZIP+4 code must be looked up individually for each box in the USPS offical website.
PO BOX 1, NORTHUMBERLAND, PA 17857-0001
PO BOX 2, NORTHUMBERLAND, PA 17857-0002
PO BOX 3, NORTHUMBERLAND, PA 17857-0003
PO BOX 4, NORTHUMBERLAND, PA 17857-0004
PO BOX 5, NORTHUMBERLAND, PA 17857-0005
PO BOX 6, NORTHUMBERLAND, PA 17857-0006
PO BOX 7, NORTHUMBERLAND, PA 17857-0007
PO BOX 8, NORTHUMBERLAND, PA 17857-0008
PO BOX 9, NORTHUMBERLAND, PA 17857-0009
PO BOX 10, NORTHUMBERLAND, PA 17857-0010
PO BOX 11, NORTHUMBERLAND, PA 17857-0011
PO BOX 12, NORTHUMBERLAND, PA 17857-0012
PO BOX 13, NORTHUMBERLAND, PA 17857-0013
PO BOX 14, NORTHUMBERLAND, PA 17857-0014
PO BOX 15, NORTHUMBERLAND, PA 17857-0015
PO BOX 16, NORTHUMBERLAND, PA 17857-0016
PO BOX 17, NORTHUMBERLAND, PA 17857-0017
PO BOX 18, NORTHUMBERLAND, PA 17857-0018
PO BOX 19, NORTHUMBERLAND, PA 17857-0019
PO BOX 20, NORTHUMBERLAND, PA 17857-0020
PO BOX 21, NORTHUMBERLAND, PA 17857-0021
PO BOX 22, NORTHUMBERLAND, PA 17857-0022
PO BOX 23, NORTHUMBERLAND, PA 17857-0023
PO BOX 24, NORTHUMBERLAND, PA 17857-0024
PO BOX 25, NORTHUMBERLAND, PA 17857-0025
PO BOX 26, NORTHUMBERLAND, PA 17857-0026
PO BOX 27, NORTHUMBERLAND, PA 17857-0027
PO BOX 28, NORTHUMBERLAND, PA 17857-0028
PO BOX 29, NORTHUMBERLAND, PA 17857-0029
PO BOX 30, NORTHUMBERLAND, PA 17857-0030
PO BOX 31, NORTHUMBERLAND, PA 17857-0031
PO BOX 32, NORTHUMBERLAND, PA 17857-0032
PO BOX 33, NORTHUMBERLAND, PA 17857-0033
PO BOX 34, NORTHUMBERLAND, PA 17857-0034
PO BOX 35, NORTHUMBERLAND, PA 17857-0035
PO BOX 36, NORTHUMBERLAND, PA 17857-0036
PO BOX 37, NORTHUMBERLAND, PA 17857-0037
PO BOX 38, NORTHUMBERLAND, PA 17857-0038
PO BOX 39, NORTHUMBERLAND, PA 17857-0039
PO BOX 40, NORTHUMBERLAND, PA 17857-0040
PO BOX 41, NORTHUMBERLAND, PA 17857-0041
PO BOX 42, NORTHUMBERLAND, PA 17857-0042
PO BOX 43, NORTHUMBERLAND, PA 17857-0043
PO BOX 44, NORTHUMBERLAND, PA 17857-0044
PO BOX 45, NORTHUMBERLAND, PA 17857-0045
PO BOX 46, NORTHUMBERLAND, PA 17857-0046
PO BOX 47, NORTHUMBERLAND, PA 17857-0047
PO BOX 48, NORTHUMBERLAND, PA 17857-0048
PO BOX 49, NORTHUMBERLAND, PA 17857-0049
PO BOX 50, NORTHUMBERLAND, PA 17857-0050
PO BOX 51, NORTHUMBERLAND, PA 17857-0051
PO BOX 52, NORTHUMBERLAND, PA 17857-0052
PO BOX 53, NORTHUMBERLAND, PA 17857-0053
PO BOX 54, NORTHUMBERLAND, PA 17857-0054
PO BOX 55, NORTHUMBERLAND, PA 17857-0055
PO BOX 56, NORTHUMBERLAND, PA 17857-0056
PO BOX 57, NORTHUMBERLAND, PA 17857-0057
PO BOX 58, NORTHUMBERLAND, PA 17857-0058
PO BOX 59, NORTHUMBERLAND, PA 17857-0059
PO BOX 60, NORTHUMBERLAND, PA 17857-0060
PO BOX 61, NORTHUMBERLAND, PA 17857-0061
PO BOX 62, NORTHUMBERLAND, PA 17857-0062
PO BOX 63, NORTHUMBERLAND, PA 17857-0063
PO BOX 64, NORTHUMBERLAND, PA 17857-0064
PO BOX 65, NORTHUMBERLAND, PA 17857-0065
PO BOX 66, NORTHUMBERLAND, PA 17857-0066
PO BOX 67, NORTHUMBERLAND, PA 17857-0067
PO BOX 68, NORTHUMBERLAND, PA 17857-0068
PO BOX 69, NORTHUMBERLAND, PA 17857-0069
PO BOX 70, NORTHUMBERLAND, PA 17857-0070
PO BOX 71, NORTHUMBERLAND, PA 17857-0071
PO BOX 72, NORTHUMBERLAND, PA 17857-0072
PO BOX 73, NORTHUMBERLAND, PA 17857-0073
PO BOX 74, NORTHUMBERLAND, PA 17857-0074
PO BOX 75, NORTHUMBERLAND, PA 17857-0075
PO BOX 76, NORTHUMBERLAND, PA 17857-0076
PO BOX 77, NORTHUMBERLAND, PA 17857-0077
PO BOX 78, NORTHUMBERLAND, PA 17857-0078
PO BOX 79, NORTHUMBERLAND, PA 17857-0079
PO BOX 80, NORTHUMBERLAND, PA 17857-0080
PO BOX 81, NORTHUMBERLAND, PA 17857-0081
PO BOX 82, NORTHUMBERLAND, PA 17857-0082
PO BOX 83, NORTHUMBERLAND, PA 17857-0083
PO BOX 84, NORTHUMBERLAND, PA 17857-0084
PO BOX 85, NORTHUMBERLAND, PA 17857-0085
PO BOX 86, NORTHUMBERLAND, PA 17857-0086
PO BOX 87, NORTHUMBERLAND, PA 17857-0087
PO BOX 88, NORTHUMBERLAND, PA 17857-0088
PO BOX 89, NORTHUMBERLAND, PA 17857-0089
PO BOX 90, NORTHUMBERLAND, PA 17857-0090
PO BOX 91, NORTHUMBERLAND, PA 17857-0091
PO BOX 92, NORTHUMBERLAND, PA 17857-0092
PO BOX 93, NORTHUMBERLAND, PA 17857-0093
PO BOX 94, NORTHUMBERLAND, PA 17857-0094
PO BOX 95, NORTHUMBERLAND, PA 17857-0095
PO BOX 96, NORTHUMBERLAND, PA 17857-0096
PO BOX 97, NORTHUMBERLAND, PA 17857-0097
PO BOX 98, NORTHUMBERLAND, PA 17857-0098
PO BOX 99, NORTHUMBERLAND, PA 17857-0099
PO BOX 100, NORTHUMBERLAND, PA 17857-0100
PO BOX 101, NORTHUMBERLAND, PA 17857-0101
PO BOX 102, NORTHUMBERLAND, PA 17857-0102
PO BOX 103, NORTHUMBERLAND, PA 17857-0103
PO BOX 104, NORTHUMBERLAND, PA 17857-0104
PO BOX 105, NORTHUMBERLAND, PA 17857-0105
PO BOX 106, NORTHUMBERLAND, PA 17857-0106
PO BOX 107, NORTHUMBERLAND, PA 17857-0107
PO BOX 108, NORTHUMBERLAND, PA 17857-0108
PO BOX 109, NORTHUMBERLAND, PA 17857-0109
PO BOX 110, NORTHUMBERLAND, PA 17857-0110
PO BOX 111, NORTHUMBERLAND, PA 17857-0111
PO BOX 112, NORTHUMBERLAND, PA 17857-0112
PO BOX 113, NORTHUMBERLAND, PA 17857-0113
PO BOX 114, NORTHUMBERLAND, PA 17857-0114
PO BOX 115, NORTHUMBERLAND, PA 17857-0115
PO BOX 116, NORTHUMBERLAND, PA 17857-0116
PO BOX 117, NORTHUMBERLAND, PA 17857-0117
PO BOX 118, NORTHUMBERLAND, PA 17857-0118
PO BOX 119, NORTHUMBERLAND, PA 17857-0119
PO BOX 120, NORTHUMBERLAND, PA 17857-0120
PO BOX 121, NORTHUMBERLAND, PA 17857-0121
PO BOX 122, NORTHUMBERLAND, PA 17857-0122
PO BOX 123, NORTHUMBERLAND, PA 17857-0123
PO BOX 124, NORTHUMBERLAND, PA 17857-0124
PO BOX 125, NORTHUMBERLAND, PA 17857-0125
PO BOX 126, NORTHUMBERLAND, PA 17857-0126
PO BOX 127, NORTHUMBERLAND, PA 17857-0127
PO BOX 128, NORTHUMBERLAND, PA 17857-0128
PO BOX 129, NORTHUMBERLAND, PA 17857-0129
PO BOX 130, NORTHUMBERLAND, PA 17857-0130
PO BOX 131, NORTHUMBERLAND, PA 17857-0131
PO BOX 132, NORTHUMBERLAND, PA 17857-0132
PO BOX 133, NORTHUMBERLAND, PA 17857-0133
PO BOX 134, NORTHUMBERLAND, PA 17857-0134
PO BOX 135, NORTHUMBERLAND, PA 17857-0135
PO BOX 136, NORTHUMBERLAND, PA 17857-0136
PO BOX 137, NORTHUMBERLAND, PA 17857-0137
PO BOX 138, NORTHUMBERLAND, PA 17857-0138
PO BOX 139, NORTHUMBERLAND, PA 17857-0139
PO BOX 140, NORTHUMBERLAND, PA 17857-0140
PO BOX 141, NORTHUMBERLAND, PA 17857-0141
PO BOX 142, NORTHUMBERLAND, PA 17857-0142
PO BOX 143, NORTHUMBERLAND, PA 17857-0143
PO BOX 144, NORTHUMBERLAND, PA 17857-0144
PO BOX 145, NORTHUMBERLAND, PA 17857-0145
PO BOX 146, NORTHUMBERLAND, PA 17857-0146
PO BOX 147, NORTHUMBERLAND, PA 17857-0147
PO BOX 148, NORTHUMBERLAND, PA 17857-0148
PO BOX 149, NORTHUMBERLAND, PA 17857-0149
PO BOX 150, NORTHUMBERLAND, PA 17857-0150
PO BOX 151, NORTHUMBERLAND, PA 17857-0151
PO BOX 152, NORTHUMBERLAND, PA 17857-0152
Add new comment