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 61, RICHVALE, CA 95974-0061
PO BOX 62, RICHVALE, CA 95974-0062
PO BOX 63, RICHVALE, CA 95974-0063
PO BOX 64, RICHVALE, CA 95974-0064
PO BOX 65, RICHVALE, CA 95974-0065
PO BOX 66, RICHVALE, CA 95974-0066
PO BOX 67, RICHVALE, CA 95974-0067
PO BOX 68, RICHVALE, CA 95974-0068
PO BOX 69, RICHVALE, CA 95974-0069
PO BOX 70, RICHVALE, CA 95974-0070
PO BOX 71, RICHVALE, CA 95974-0071
PO BOX 72, RICHVALE, CA 95974-0072
PO BOX 73, RICHVALE, CA 95974-0073
PO BOX 74, RICHVALE, CA 95974-0074
PO BOX 75, RICHVALE, CA 95974-0075
PO BOX 76, RICHVALE, CA 95974-0076
PO BOX 77, RICHVALE, CA 95974-0077
PO BOX 78, RICHVALE, CA 95974-0078
PO BOX 79, RICHVALE, CA 95974-0079
PO BOX 80, RICHVALE, CA 95974-0080
PO BOX 81, RICHVALE, CA 95974-0081
PO BOX 82, RICHVALE, CA 95974-0082
PO BOX 83, RICHVALE, CA 95974-0083
PO BOX 84, RICHVALE, CA 95974-0084
PO BOX 85, RICHVALE, CA 95974-0085
PO BOX 86, RICHVALE, CA 95974-0086
PO BOX 87, RICHVALE, CA 95974-0087
PO BOX 88, RICHVALE, CA 95974-0088
PO BOX 89, RICHVALE, CA 95974-0089
PO BOX 90, RICHVALE, CA 95974-0090
PO BOX 91, RICHVALE, CA 95974-0091
PO BOX 92, RICHVALE, CA 95974-0092
PO BOX 93, RICHVALE, CA 95974-0093
PO BOX 94, RICHVALE, CA 95974-0094
PO BOX 95, RICHVALE, CA 95974-0095
PO BOX 96, RICHVALE, CA 95974-0096
PO BOX 97, RICHVALE, CA 95974-0097
PO BOX 98, RICHVALE, CA 95974-0098
PO BOX 99, RICHVALE, CA 95974-0099
PO BOX 100, RICHVALE, CA 95974-0100
PO BOX 101, RICHVALE, CA 95974-0101
PO BOX 102, RICHVALE, CA 95974-0102
PO BOX 103, RICHVALE, CA 95974-0103
PO BOX 104, RICHVALE, CA 95974-0104
PO BOX 105, RICHVALE, CA 95974-0105
PO BOX 106, RICHVALE, CA 95974-0106
PO BOX 107, RICHVALE, CA 95974-0107
PO BOX 108, RICHVALE, CA 95974-0108
PO BOX 109, RICHVALE, CA 95974-0109
PO BOX 110, RICHVALE, CA 95974-0110
PO BOX 111, RICHVALE, CA 95974-0111
PO BOX 112, RICHVALE, CA 95974-0112
PO BOX 113, RICHVALE, CA 95974-0113
PO BOX 114, RICHVALE, CA 95974-0114
PO BOX 115, RICHVALE, CA 95974-0115
PO BOX 116, RICHVALE, CA 95974-0116
PO BOX 117, RICHVALE, CA 95974-0117
PO BOX 118, RICHVALE, CA 95974-0118
PO BOX 119, RICHVALE, CA 95974-0119
PO BOX 120, RICHVALE, CA 95974-0120
PO BOX 121, RICHVALE, CA 95974-0121
PO BOX 122, RICHVALE, CA 95974-0122
PO BOX 123, RICHVALE, CA 95974-0123
PO BOX 124, RICHVALE, CA 95974-0124
PO BOX 125, RICHVALE, CA 95974-0125
PO BOX 126, RICHVALE, CA 95974-0126
PO BOX 127, RICHVALE, CA 95974-0127
PO BOX 128, RICHVALE, CA 95974-0128
PO BOX 129, RICHVALE, CA 95974-0129
PO BOX 130, RICHVALE, CA 95974-0130
PO BOX 131, RICHVALE, CA 95974-0131
PO BOX 132, RICHVALE, CA 95974-0132
PO BOX 133, RICHVALE, CA 95974-0133
PO BOX 134, RICHVALE, CA 95974-0134
PO BOX 135, RICHVALE, CA 95974-0135
PO BOX 136, RICHVALE, CA 95974-0136
PO BOX 137, RICHVALE, CA 95974-0137
PO BOX 138, RICHVALE, CA 95974-0138
PO BOX 139, RICHVALE, CA 95974-0139
PO BOX 140, RICHVALE, CA 95974-0140
PO BOX 141, RICHVALE, CA 95974-0141
PO BOX 142, RICHVALE, CA 95974-0142
PO BOX 143, RICHVALE, CA 95974-0143
PO BOX 144, RICHVALE, CA 95974-0144
PO BOX 145, RICHVALE, CA 95974-0145
PO BOX 146, RICHVALE, CA 95974-0146
PO BOX 147, RICHVALE, CA 95974-0147
PO BOX 148, RICHVALE, CA 95974-0148
PO BOX 149, RICHVALE, CA 95974-0149
PO BOX 150, RICHVALE, CA 95974-0150
PO BOX 151, RICHVALE, CA 95974-0151
PO BOX 152, RICHVALE, CA 95974-0152
PO BOX 153, RICHVALE, CA 95974-0153
PO BOX 154, RICHVALE, CA 95974-0154
PO BOX 155, RICHVALE, CA 95974-0155
PO BOX 156, RICHVALE, CA 95974-0156
PO BOX 157, RICHVALE, CA 95974-0157
PO BOX 158, RICHVALE, CA 95974-0158
PO BOX 159, RICHVALE, CA 95974-0159
PO BOX 160, RICHVALE, CA 95974-0160
PO BOX 161, RICHVALE, CA 95974-0161
PO BOX 162, RICHVALE, CA 95974-0162
PO BOX 163, RICHVALE, CA 95974-0163
PO BOX 164, RICHVALE, CA 95974-0164
PO BOX 165, RICHVALE, CA 95974-0165
PO BOX 166, RICHVALE, CA 95974-0166
PO BOX 167, RICHVALE, CA 95974-0167
PO BOX 168, RICHVALE, CA 95974-0168
PO BOX 169, RICHVALE, CA 95974-0169
PO BOX 170, RICHVALE, CA 95974-0170
PO BOX 171, RICHVALE, CA 95974-0171
PO BOX 172, RICHVALE, CA 95974-0172
PO BOX 173, RICHVALE, CA 95974-0173
PO BOX 174, RICHVALE, CA 95974-0174
PO BOX 175, RICHVALE, CA 95974-0175
PO BOX 176, RICHVALE, CA 95974-0176
PO BOX 177, RICHVALE, CA 95974-0177
PO BOX 178, RICHVALE, CA 95974-0178
PO BOX 179, RICHVALE, CA 95974-0179
PO BOX 180, RICHVALE, CA 95974-0180
PO BOX 181, RICHVALE, CA 95974-0181
PO BOX 182, RICHVALE, CA 95974-0182
PO BOX 183, RICHVALE, CA 95974-0183
PO BOX 184, RICHVALE, CA 95974-0184
PO BOX 185, RICHVALE, CA 95974-0185
PO BOX 186, RICHVALE, CA 95974-0186
PO BOX 187, RICHVALE, CA 95974-0187
PO BOX 188, RICHVALE, CA 95974-0188
PO BOX 189, RICHVALE, CA 95974-0189
PO BOX 190, RICHVALE, CA 95974-0190
PO BOX 191, RICHVALE, CA 95974-0191
PO BOX 192, RICHVALE, CA 95974-0192
PO BOX 193, RICHVALE, CA 95974-0193
PO BOX 194, RICHVALE, CA 95974-0194
PO BOX 195, RICHVALE, CA 95974-0195
PO BOX 196, RICHVALE, CA 95974-0196
PO BOX 197, RICHVALE, CA 95974-0197
PO BOX 198, RICHVALE, CA 95974-0198
PO BOX 199, RICHVALE, CA 95974-0199
PO BOX 200, RICHVALE, CA 95974-0200
PO BOX 201, RICHVALE, CA 95974-0201
PO BOX 202, RICHVALE, CA 95974-0202
PO BOX 203, RICHVALE, CA 95974-0203
PO BOX 204, RICHVALE, CA 95974-0204
PO BOX 205, RICHVALE, CA 95974-0205
PO BOX 206, RICHVALE, CA 95974-0206
PO BOX 207, RICHVALE, CA 95974-0207
PO BOX 208, RICHVALE, CA 95974-0208
PO BOX 209, RICHVALE, CA 95974-0209
PO BOX 210, RICHVALE, CA 95974-0210
PO BOX 211, RICHVALE, CA 95974-0211
PO BOX 212, RICHVALE, CA 95974-0212
PO BOX 213, RICHVALE, CA 95974-0213
PO BOX 214, RICHVALE, CA 95974-0214
PO BOX 215, RICHVALE, CA 95974-0215
PO BOX 216, RICHVALE, CA 95974-0216
PO BOX 217, RICHVALE, CA 95974-0217
PO BOX 218, RICHVALE, CA 95974-0218
PO BOX 219, RICHVALE, CA 95974-0219
PO BOX 220, RICHVALE, CA 95974-0220
PO BOX 221, RICHVALE, CA 95974-0221
PO BOX 222, RICHVALE, CA 95974-0222
PO BOX 223, RICHVALE, CA 95974-0223
PO BOX 224, RICHVALE, CA 95974-0224
PO BOX 225, RICHVALE, CA 95974-0225
PO BOX 226, RICHVALE, CA 95974-0226
PO BOX 227, RICHVALE, CA 95974-0227
PO BOX 228, RICHVALE, CA 95974-0228
PO BOX 229, RICHVALE, CA 95974-0229
PO BOX 230, RICHVALE, CA 95974-0230
PO BOX 231, RICHVALE, CA 95974-0231
PO BOX 232, RICHVALE, CA 95974-0232
PO BOX 233, RICHVALE, CA 95974-0233
PO BOX 234, RICHVALE, CA 95974-0234
PO BOX 235, RICHVALE, CA 95974-0235
PO BOX 236, RICHVALE, CA 95974-0236
PO BOX 237, RICHVALE, CA 95974-0237
PO BOX 238, RICHVALE, CA 95974-0238
PO BOX 239, RICHVALE, CA 95974-0239
PO BOX 240, RICHVALE, CA 95974-0240
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