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 652100, DALLAS, TX 75265-2100
PO BOX 652101, DALLAS, TX 75265-2101
PO BOX 652102, DALLAS, TX 75265-2102
PO BOX 652103, DALLAS, TX 75265-2103
PO BOX 652104, DALLAS, TX 75265-2104
PO BOX 652105, DALLAS, TX 75265-2105
PO BOX 652106, DALLAS, TX 75265-2106
PO BOX 652107, DALLAS, TX 75265-2107
PO BOX 652108, DALLAS, TX 75265-2108
PO BOX 652109, DALLAS, TX 75265-2109
PO BOX 652110, DALLAS, TX 75265-2110
PO BOX 652111, DALLAS, TX 75265-2111
PO BOX 652112, DALLAS, TX 75265-2112
PO BOX 652113, DALLAS, TX 75265-2113
PO BOX 652114, DALLAS, TX 75265-2114
PO BOX 652115, DALLAS, TX 75265-2115
PO BOX 652116, DALLAS, TX 75265-2116
PO BOX 652117, DALLAS, TX 75265-2117
PO BOX 652118, DALLAS, TX 75265-2118
PO BOX 652119, DALLAS, TX 75265-2119
PO BOX 652120, DALLAS, TX 75265-2120
PO BOX 652121, DALLAS, TX 75265-2121
PO BOX 652122, DALLAS, TX 75265-2122
PO BOX 652123, DALLAS, TX 75265-2123
PO BOX 652124, DALLAS, TX 75265-2124
PO BOX 652125, DALLAS, TX 75265-2125
PO BOX 652126, DALLAS, TX 75265-2126
PO BOX 652127, DALLAS, TX 75265-2127
PO BOX 652128, DALLAS, TX 75265-2128
PO BOX 652129, DALLAS, TX 75265-2129
PO BOX 652130, DALLAS, TX 75265-2130
PO BOX 652131, DALLAS, TX 75265-2131
PO BOX 652132, DALLAS, TX 75265-2132
PO BOX 652133, DALLAS, TX 75265-2133
PO BOX 652134, DALLAS, TX 75265-2134
PO BOX 652135, DALLAS, TX 75265-2135
PO BOX 652136, DALLAS, TX 75265-2136
PO BOX 652137, DALLAS, TX 75265-2137
PO BOX 652138, DALLAS, TX 75265-2138
PO BOX 652139, DALLAS, TX 75265-2139
PO BOX 652140, DALLAS, TX 75265-2140
PO BOX 652141, DALLAS, TX 75265-2141
PO BOX 652142, DALLAS, TX 75265-2142
PO BOX 652143, DALLAS, TX 75265-2143
PO BOX 652144, DALLAS, TX 75265-2144
PO BOX 652145, DALLAS, TX 75265-2145
PO BOX 652146, DALLAS, TX 75265-2146
PO BOX 652147, DALLAS, TX 75265-2147
PO BOX 652148, DALLAS, TX 75265-2148
PO BOX 652149, DALLAS, TX 75265-2149
PO BOX 652150, DALLAS, TX 75265-2150
PO BOX 652151, DALLAS, TX 75265-2151
PO BOX 652152, DALLAS, TX 75265-2152
PO BOX 652153, DALLAS, TX 75265-2153
PO BOX 652154, DALLAS, TX 75265-2154
PO BOX 652155, DALLAS, TX 75265-2155
PO BOX 652156, DALLAS, TX 75265-2156
PO BOX 652157, DALLAS, TX 75265-2157
PO BOX 652158, DALLAS, TX 75265-2158
PO BOX 652159, DALLAS, TX 75265-2159
PO BOX 652160, DALLAS, TX 75265-2160
PO BOX 652161, DALLAS, TX 75265-2161
PO BOX 652162, DALLAS, TX 75265-2162
PO BOX 652163, DALLAS, TX 75265-2163
PO BOX 652164, DALLAS, TX 75265-2164
PO BOX 652165, DALLAS, TX 75265-2165
PO BOX 652166, DALLAS, TX 75265-2166
PO BOX 652167, DALLAS, TX 75265-2167
PO BOX 652168, DALLAS, TX 75265-2168
PO BOX 652169, DALLAS, TX 75265-2169
PO BOX 652170, DALLAS, TX 75265-2170
PO BOX 652171, DALLAS, TX 75265-2171
PO BOX 652172, DALLAS, TX 75265-2172
PO BOX 652173, DALLAS, TX 75265-2173
PO BOX 652174, DALLAS, TX 75265-2174
PO BOX 652175, DALLAS, TX 75265-2175
PO BOX 652176, DALLAS, TX 75265-2176
PO BOX 652177, DALLAS, TX 75265-2177
PO BOX 652178, DALLAS, TX 75265-2178
PO BOX 652179, DALLAS, TX 75265-2179
PO BOX 652180, DALLAS, TX 75265-2180
PO BOX 652181, DALLAS, TX 75265-2181
PO BOX 652182, DALLAS, TX 75265-2182
PO BOX 652183, DALLAS, TX 75265-2183
PO BOX 652184, DALLAS, TX 75265-2184
PO BOX 652185, DALLAS, TX 75265-2185
PO BOX 652186, DALLAS, TX 75265-2186
PO BOX 652187, DALLAS, TX 75265-2187
PO BOX 652188, DALLAS, TX 75265-2188
PO BOX 652189, DALLAS, TX 75265-2189
PO BOX 652190, DALLAS, TX 75265-2190
PO BOX 652191, DALLAS, TX 75265-2191
PO BOX 652192, DALLAS, TX 75265-2192
PO BOX 652193, DALLAS, TX 75265-2193
PO BOX 652194, DALLAS, TX 75265-2194
PO BOX 652195, DALLAS, TX 75265-2195
PO BOX 652196, DALLAS, TX 75265-2196
PO BOX 652197, DALLAS, TX 75265-2197
PO BOX 652198, DALLAS, TX 75265-2198
PO BOX 652199, DALLAS, TX 75265-2199
PO BOX 652200, DALLAS, TX 75265-2200
PO BOX 652201, DALLAS, TX 75265-2201
PO BOX 652202, DALLAS, TX 75265-2202
PO BOX 652203, DALLAS, TX 75265-2203
PO BOX 652204, DALLAS, TX 75265-2204
PO BOX 652205, DALLAS, TX 75265-2205
PO BOX 652206, DALLAS, TX 75265-2206
PO BOX 652207, DALLAS, TX 75265-2207
PO BOX 652208, DALLAS, TX 75265-2208
PO BOX 652209, DALLAS, TX 75265-2209
PO BOX 652210, DALLAS, TX 75265-2210
PO BOX 652211, DALLAS, TX 75265-2211
PO BOX 652212, DALLAS, TX 75265-2212
PO BOX 652213, DALLAS, TX 75265-2213
PO BOX 652214, DALLAS, TX 75265-2214
PO BOX 652215, DALLAS, TX 75265-2215
PO BOX 652216, DALLAS, TX 75265-2216
PO BOX 652217, DALLAS, TX 75265-2217
PO BOX 652218, DALLAS, TX 75265-2218
PO BOX 652219, DALLAS, TX 75265-2219
PO BOX 652220, DALLAS, TX 75265-2220
PO BOX 652221, DALLAS, TX 75265-2221
PO BOX 652222, DALLAS, TX 75265-2222
PO BOX 652223, DALLAS, TX 75265-2223
PO BOX 652224, DALLAS, TX 75265-2224
PO BOX 652225, DALLAS, TX 75265-2225
PO BOX 652226, DALLAS, TX 75265-2226
PO BOX 652227, DALLAS, TX 75265-2227
PO BOX 652228, DALLAS, TX 75265-2228
PO BOX 652229, DALLAS, TX 75265-2229
PO BOX 652230, DALLAS, TX 75265-2230
PO BOX 652231, DALLAS, TX 75265-2231
PO BOX 652232, DALLAS, TX 75265-2232
PO BOX 652233, DALLAS, TX 75265-2233
PO BOX 652234, DALLAS, TX 75265-2234
PO BOX 652235, DALLAS, TX 75265-2235
PO BOX 652236, DALLAS, TX 75265-2236
PO BOX 652237, DALLAS, TX 75265-2237
PO BOX 652238, DALLAS, TX 75265-2238
PO BOX 652239, DALLAS, TX 75265-2239
PO BOX 652240, DALLAS, TX 75265-2240
PO BOX 652241, DALLAS, TX 75265-2241
PO BOX 652242, DALLAS, TX 75265-2242
PO BOX 652243, DALLAS, TX 75265-2243
PO BOX 652244, DALLAS, TX 75265-2244
PO BOX 652245, DALLAS, TX 75265-2245
PO BOX 652246, DALLAS, TX 75265-2246
PO BOX 652247, DALLAS, TX 75265-2247
PO BOX 652248, DALLAS, TX 75265-2248
PO BOX 652249, DALLAS, TX 75265-2249
PO BOX 652250, DALLAS, TX 75265-2250
PO BOX 652251, DALLAS, TX 75265-2251
PO BOX 652252, DALLAS, TX 75265-2252
PO BOX 652253, DALLAS, TX 75265-2253
PO BOX 652254, DALLAS, TX 75265-2254
PO BOX 652255, DALLAS, TX 75265-2255
PO BOX 652256, DALLAS, TX 75265-2256
PO BOX 652257, DALLAS, TX 75265-2257
PO BOX 652258, DALLAS, TX 75265-2258
PO BOX 652259, DALLAS, TX 75265-2259
PO BOX 652260, DALLAS, TX 75265-2260
PO BOX 652261, DALLAS, TX 75265-2261
PO BOX 652262, DALLAS, TX 75265-2262
PO BOX 652263, DALLAS, TX 75265-2263
PO BOX 652264, DALLAS, TX 75265-2264
PO BOX 652265, DALLAS, TX 75265-2265
PO BOX 652266, DALLAS, TX 75265-2266
PO BOX 652267, DALLAS, TX 75265-2267
PO BOX 652268, DALLAS, TX 75265-2268
PO BOX 652269, DALLAS, TX 75265-2269
PO BOX 652270, DALLAS, TX 75265-2270
PO BOX 652271, DALLAS, TX 75265-2271
PO BOX 652272, DALLAS, TX 75265-2272
PO BOX 652273, DALLAS, TX 75265-2273
PO BOX 652274, DALLAS, TX 75265-2274
PO BOX 652275, DALLAS, TX 75265-2275
PO BOX 652276, DALLAS, TX 75265-2276
PO BOX 652277, DALLAS, TX 75265-2277
PO BOX 652278, DALLAS, TX 75265-2278
PO BOX 652279, DALLAS, TX 75265-2279
PO BOX 652280, DALLAS, TX 75265-2280
PO BOX 652281, DALLAS, TX 75265-2281
PO BOX 652282, DALLAS, TX 75265-2282
PO BOX 652283, DALLAS, TX 75265-2283
PO BOX 652284, DALLAS, TX 75265-2284
PO BOX 652285, DALLAS, TX 75265-2285
PO BOX 652286, DALLAS, TX 75265-2286
PO BOX 652287, DALLAS, TX 75265-2287
PO BOX 652288, DALLAS, TX 75265-2288
PO BOX 652289, DALLAS, TX 75265-2289
PO BOX 652290, DALLAS, TX 75265-2290
PO BOX 652291, DALLAS, TX 75265-2291
PO BOX 652292, DALLAS, TX 75265-2292
PO BOX 652293, DALLAS, TX 75265-2293
PO BOX 652294, DALLAS, TX 75265-2294
PO BOX 652295, DALLAS, TX 75265-2295
PO BOX 652296, DALLAS, TX 75265-2296
PO BOX 652297, DALLAS, TX 75265-2297
PO BOX 652298, DALLAS, TX 75265-2298
PO BOX 652299, DALLAS, TX 75265-2299
PO BOX 652300, DALLAS, TX 75265-2300