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, NEW YORK, NY 10116-0001
PO BOX 2, NEW YORK, NY 10116-0002
PO BOX 3, NEW YORK, NY 10116-0003
PO BOX 4, NEW YORK, NY 10116-0004
PO BOX 5, NEW YORK, NY 10116-0005
PO BOX 6, NEW YORK, NY 10116-0006
PO BOX 7, NEW YORK, NY 10116-0007
PO BOX 8, NEW YORK, NY 10116-0008
PO BOX 9, NEW YORK, NY 10116-0009
PO BOX 10, NEW YORK, NY 10116-0010
PO BOX 11, NEW YORK, NY 10116-0011
PO BOX 12, NEW YORK, NY 10116-0012
PO BOX 13, NEW YORK, NY 10116-0013
PO BOX 14, NEW YORK, NY 10116-0014
PO BOX 15, NEW YORK, NY 10116-0015
PO BOX 16, NEW YORK, NY 10116-0016
PO BOX 17, NEW YORK, NY 10116-0017
PO BOX 18, NEW YORK, NY 10116-0018
PO BOX 19, NEW YORK, NY 10116-0019
PO BOX 20, NEW YORK, NY 10116-0020
PO BOX 21, NEW YORK, NY 10116-0021
PO BOX 22, NEW YORK, NY 10116-0022
PO BOX 23, NEW YORK, NY 10116-0023
PO BOX 24, NEW YORK, NY 10116-0024
PO BOX 25, NEW YORK, NY 10116-0025
PO BOX 26, NEW YORK, NY 10116-0026
PO BOX 27, NEW YORK, NY 10116-0027
PO BOX 28, NEW YORK, NY 10116-0028
PO BOX 29, NEW YORK, NY 10116-0029
PO BOX 30, NEW YORK, NY 10116-0030
PO BOX 31, NEW YORK, NY 10116-0031
PO BOX 32, NEW YORK, NY 10116-0032
PO BOX 33, NEW YORK, NY 10116-0033
PO BOX 34, NEW YORK, NY 10116-0034
PO BOX 35, NEW YORK, NY 10116-0035
PO BOX 36, NEW YORK, NY 10116-0036
PO BOX 37, NEW YORK, NY 10116-0037
PO BOX 38, NEW YORK, NY 10116-0038
PO BOX 39, NEW YORK, NY 10116-0039
PO BOX 40, NEW YORK, NY 10116-0040
PO BOX 41, NEW YORK, NY 10116-0041
PO BOX 42, NEW YORK, NY 10116-0042
PO BOX 43, NEW YORK, NY 10116-0043
PO BOX 44, NEW YORK, NY 10116-0044
PO BOX 45, NEW YORK, NY 10116-0045
PO BOX 46, NEW YORK, NY 10116-0046
PO BOX 47, NEW YORK, NY 10116-0047
PO BOX 48, NEW YORK, NY 10116-0048
PO BOX 49, NEW YORK, NY 10116-0049
PO BOX 50, NEW YORK, NY 10116-0050
PO BOX 51, NEW YORK, NY 10116-0051
PO BOX 52, NEW YORK, NY 10116-0052
PO BOX 53, NEW YORK, NY 10116-0053
PO BOX 54, NEW YORK, NY 10116-0054
PO BOX 55, NEW YORK, NY 10116-0055
PO BOX 56, NEW YORK, NY 10116-0056
PO BOX 57, NEW YORK, NY 10116-0057
PO BOX 58, NEW YORK, NY 10116-0058
PO BOX 59, NEW YORK, NY 10116-0059
PO BOX 60, NEW YORK, NY 10116-0060
PO BOX 61, NEW YORK, NY 10116-0061
PO BOX 62, NEW YORK, NY 10116-0062
PO BOX 63, NEW YORK, NY 10116-0063
PO BOX 64, NEW YORK, NY 10116-0064
PO BOX 65, NEW YORK, NY 10116-0065
PO BOX 66, NEW YORK, NY 10116-0066
PO BOX 67, NEW YORK, NY 10116-0067
PO BOX 68, NEW YORK, NY 10116-0068
PO BOX 69, NEW YORK, NY 10116-0069
PO BOX 70, NEW YORK, NY 10116-0070
PO BOX 71, NEW YORK, NY 10116-0071
PO BOX 72, NEW YORK, NY 10116-0072
PO BOX 73, NEW YORK, NY 10116-0073
PO BOX 74, NEW YORK, NY 10116-0074
PO BOX 75, NEW YORK, NY 10116-0075
PO BOX 76, NEW YORK, NY 10116-0076
PO BOX 77, NEW YORK, NY 10116-0077
PO BOX 78, NEW YORK, NY 10116-0078
PO BOX 79, NEW YORK, NY 10116-0079
PO BOX 80, NEW YORK, NY 10116-0080
PO BOX 81, NEW YORK, NY 10116-0081
PO BOX 82, NEW YORK, NY 10116-0082
PO BOX 83, NEW YORK, NY 10116-0083
PO BOX 84, NEW YORK, NY 10116-0084
PO BOX 85, NEW YORK, NY 10116-0085
PO BOX 86, NEW YORK, NY 10116-0086
PO BOX 87, NEW YORK, NY 10116-0087
PO BOX 88, NEW YORK, NY 10116-0088
PO BOX 89, NEW YORK, NY 10116-0089
PO BOX 90, NEW YORK, NY 10116-0090
PO BOX 91, NEW YORK, NY 10116-0091
PO BOX 92, NEW YORK, NY 10116-0092
PO BOX 93, NEW YORK, NY 10116-0093
PO BOX 94, NEW YORK, NY 10116-0094
PO BOX 95, NEW YORK, NY 10116-0095
PO BOX 96, NEW YORK, NY 10116-0096
PO BOX 97, NEW YORK, NY 10116-0097
PO BOX 98, NEW YORK, NY 10116-0098
PO BOX 99, NEW YORK, NY 10116-0099
PO BOX 100, NEW YORK, NY 10116-0100
PO BOX 101, NEW YORK, NY 10116-0101
PO BOX 102, NEW YORK, NY 10116-0102
PO BOX 103, NEW YORK, NY 10116-0103
PO BOX 104, NEW YORK, NY 10116-0104
PO BOX 105, NEW YORK, NY 10116-0105
PO BOX 106, NEW YORK, NY 10116-0106
PO BOX 107, NEW YORK, NY 10116-0107
PO BOX 108, NEW YORK, NY 10116-0108
PO BOX 109, NEW YORK, NY 10116-0109
PO BOX 110, NEW YORK, NY 10116-0110
PO BOX 111, NEW YORK, NY 10116-0111
PO BOX 112, NEW YORK, NY 10116-0112
PO BOX 113, NEW YORK, NY 10116-0113
PO BOX 114, NEW YORK, NY 10116-0114
PO BOX 115, NEW YORK, NY 10116-0115
PO BOX 116, NEW YORK, NY 10116-0116
PO BOX 117, NEW YORK, NY 10116-0117
PO BOX 118, NEW YORK, NY 10116-0118
PO BOX 119, NEW YORK, NY 10116-0119
PO BOX 120, NEW YORK, NY 10116-0120
PO BOX 121, NEW YORK, NY 10116-0121
PO BOX 122, NEW YORK, NY 10116-0122
PO BOX 123, NEW YORK, NY 10116-0123
PO BOX 124, NEW YORK, NY 10116-0124
PO BOX 125, NEW YORK, NY 10116-0125
PO BOX 126, NEW YORK, NY 10116-0126
PO BOX 127, NEW YORK, NY 10116-0127
PO BOX 128, NEW YORK, NY 10116-0128
PO BOX 129, NEW YORK, NY 10116-0129
PO BOX 130, NEW YORK, NY 10116-0130
PO BOX 131, NEW YORK, NY 10116-0131
PO BOX 132, NEW YORK, NY 10116-0132
PO BOX 133, NEW YORK, NY 10116-0133
PO BOX 134, NEW YORK, NY 10116-0134
PO BOX 135, NEW YORK, NY 10116-0135
PO BOX 136, NEW YORK, NY 10116-0136
PO BOX 137, NEW YORK, NY 10116-0137
PO BOX 138, NEW YORK, NY 10116-0138
PO BOX 139, NEW YORK, NY 10116-0139
PO BOX 140, NEW YORK, NY 10116-0140
PO BOX 141, NEW YORK, NY 10116-0141
PO BOX 142, NEW YORK, NY 10116-0142
PO BOX 143, NEW YORK, NY 10116-0143
PO BOX 144, NEW YORK, NY 10116-0144
PO BOX 145, NEW YORK, NY 10116-0145
PO BOX 146, NEW YORK, NY 10116-0146
PO BOX 147, NEW YORK, NY 10116-0147
PO BOX 148, NEW YORK, NY 10116-0148
PO BOX 149, NEW YORK, NY 10116-0149
PO BOX 150, NEW YORK, NY 10116-0150
PO BOX 151, NEW YORK, NY 10116-0151
PO BOX 152, NEW YORK, NY 10116-0152
PO BOX 153, NEW YORK, NY 10116-0153
PO BOX 154, NEW YORK, NY 10116-0154
PO BOX 155, NEW YORK, NY 10116-0155
PO BOX 156, NEW YORK, NY 10116-0156
PO BOX 157, NEW YORK, NY 10116-0157
PO BOX 158, NEW YORK, NY 10116-0158
PO BOX 159, NEW YORK, NY 10116-0159
PO BOX 160, NEW YORK, NY 10116-0160
PO BOX 161, NEW YORK, NY 10116-0161
PO BOX 162, NEW YORK, NY 10116-0162
PO BOX 163, NEW YORK, NY 10116-0163
PO BOX 164, NEW YORK, NY 10116-0164
PO BOX 165, NEW YORK, NY 10116-0165
PO BOX 166, NEW YORK, NY 10116-0166
PO BOX 167, NEW YORK, NY 10116-0167
PO BOX 168, NEW YORK, NY 10116-0168
PO BOX 169, NEW YORK, NY 10116-0169
PO BOX 170, NEW YORK, NY 10116-0170
PO BOX 171, NEW YORK, NY 10116-0171
PO BOX 172, NEW YORK, NY 10116-0172
PO BOX 173, NEW YORK, NY 10116-0173
PO BOX 174, NEW YORK, NY 10116-0174
PO BOX 175, NEW YORK, NY 10116-0175
PO BOX 176, NEW YORK, NY 10116-0176
PO BOX 177, NEW YORK, NY 10116-0177
PO BOX 178, NEW YORK, NY 10116-0178
PO BOX 179, NEW YORK, NY 10116-0179
PO BOX 180, NEW YORK, NY 10116-0180
PO BOX 181, NEW YORK, NY 10116-0181
PO BOX 182, NEW YORK, NY 10116-0182
PO BOX 183, NEW YORK, NY 10116-0183
PO BOX 184, NEW YORK, NY 10116-0184
PO BOX 185, NEW YORK, NY 10116-0185
PO BOX 186, NEW YORK, NY 10116-0186
PO BOX 187, NEW YORK, NY 10116-0187
PO BOX 188, NEW YORK, NY 10116-0188
PO BOX 189, NEW YORK, NY 10116-0189
PO BOX 190, NEW YORK, NY 10116-0190
PO BOX 191, NEW YORK, NY 10116-0191
PO BOX 192, NEW YORK, NY 10116-0192
PO BOX 193, NEW YORK, NY 10116-0193
PO BOX 194, NEW YORK, NY 10116-0194
PO BOX 195, NEW YORK, NY 10116-0195
PO BOX 196, NEW YORK, NY 10116-0196
PO BOX 197, NEW YORK, NY 10116-0197
PO BOX 198, NEW YORK, NY 10116-0198
PO BOX 199, NEW YORK, NY 10116-0199
PO BOX 200, NEW YORK, NY 10116-0200
PO BOX 201, NEW YORK, NY 10116-0201
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