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 122037, DALLAS, TX 75312-2037
PO BOX 122038, DALLAS, TX 75312-2038
PO BOX 122039, DALLAS, TX 75312-2039
PO BOX 122040, DALLAS, TX 75312-2040
PO BOX 122041, DALLAS, TX 75312-2041
PO BOX 122042, DALLAS, TX 75312-2042
PO BOX 122043, DALLAS, TX 75312-2043
PO BOX 122044, DALLAS, TX 75312-2044
PO BOX 122045, DALLAS, TX 75312-2045
PO BOX 122046, DALLAS, TX 75312-2046
PO BOX 122047, DALLAS, TX 75312-2047
PO BOX 122048, DALLAS, TX 75312-2048
PO BOX 122049, DALLAS, TX 75312-2049
PO BOX 122050, DALLAS, TX 75312-2050
PO BOX 122051, DALLAS, TX 75312-2051
PO BOX 122052, DALLAS, TX 75312-2052
PO BOX 122053, DALLAS, TX 75312-2053
PO BOX 122054, DALLAS, TX 75312-2054
PO BOX 122055, DALLAS, TX 75312-2055
PO BOX 122056, DALLAS, TX 75312-2056
PO BOX 122057, DALLAS, TX 75312-2057
PO BOX 122058, DALLAS, TX 75312-2058
PO BOX 122059, DALLAS, TX 75312-2059
PO BOX 122060, DALLAS, TX 75312-2060
PO BOX 122061, DALLAS, TX 75312-2061
PO BOX 122062, DALLAS, TX 75312-2062
PO BOX 122063, DALLAS, TX 75312-2063
PO BOX 122064, DALLAS, TX 75312-2064
PO BOX 122065, DALLAS, TX 75312-2065
PO BOX 122066, DALLAS, TX 75312-2066
PO BOX 122067, DALLAS, TX 75312-2067
PO BOX 122068, DALLAS, TX 75312-2068
PO BOX 122069, DALLAS, TX 75312-2069
PO BOX 122070, DALLAS, TX 75312-2070
PO BOX 122071, DALLAS, TX 75312-2071
PO BOX 122072, DALLAS, TX 75312-2072
PO BOX 122073, DALLAS, TX 75312-2073
PO BOX 122074, DALLAS, TX 75312-2074
PO BOX 122075, DALLAS, TX 75312-2075
PO BOX 122076, DALLAS, TX 75312-2076
PO BOX 122077, DALLAS, TX 75312-2077
PO BOX 122078, DALLAS, TX 75312-2078
PO BOX 122079, DALLAS, TX 75312-2079
PO BOX 122080, DALLAS, TX 75312-2080
PO BOX 122081, DALLAS, TX 75312-2081
PO BOX 122082, DALLAS, TX 75312-2082
PO BOX 122083, DALLAS, TX 75312-2083
PO BOX 122084, DALLAS, TX 75312-2084
PO BOX 122085, DALLAS, TX 75312-2085
PO BOX 122086, DALLAS, TX 75312-2086
PO BOX 122087, DALLAS, TX 75312-2087
PO BOX 122088, DALLAS, TX 75312-2088
PO BOX 122089, DALLAS, TX 75312-2089
PO BOX 122090, DALLAS, TX 75312-2090
PO BOX 122091, DALLAS, TX 75312-2091
PO BOX 122092, DALLAS, TX 75312-2092
PO BOX 122093, DALLAS, TX 75312-2093
PO BOX 122094, DALLAS, TX 75312-2094
PO BOX 122095, DALLAS, TX 75312-2095
PO BOX 122096, DALLAS, TX 75312-2096
PO BOX 122097, DALLAS, TX 75312-2097
PO BOX 122098, DALLAS, TX 75312-2098
PO BOX 122099, DALLAS, TX 75312-2099
PO BOX 122100, DALLAS, TX 75312-2100
PO BOX 122101, DALLAS, TX 75312-2101
PO BOX 122102, DALLAS, TX 75312-2102
PO BOX 122103, DALLAS, TX 75312-2103
PO BOX 122104, DALLAS, TX 75312-2104
PO BOX 122105, DALLAS, TX 75312-2105
PO BOX 122106, DALLAS, TX 75312-2106
PO BOX 122107, DALLAS, TX 75312-2107
PO BOX 122108, DALLAS, TX 75312-2108
PO BOX 122109, DALLAS, TX 75312-2109
PO BOX 122110, DALLAS, TX 75312-2110
PO BOX 122111, DALLAS, TX 75312-2111
PO BOX 122112, DALLAS, TX 75312-2112
PO BOX 122113, DALLAS, TX 75312-2113
PO BOX 122114, DALLAS, TX 75312-2114
PO BOX 122115, DALLAS, TX 75312-2115
PO BOX 122116, DALLAS, TX 75312-2116
PO BOX 122117, DALLAS, TX 75312-2117
PO BOX 122118, DALLAS, TX 75312-2118
PO BOX 122119, DALLAS, TX 75312-2119
PO BOX 122120, DALLAS, TX 75312-2120
PO BOX 122121, DALLAS, TX 75312-2121
PO BOX 122122, DALLAS, TX 75312-2122
PO BOX 122123, DALLAS, TX 75312-2123
PO BOX 122124, DALLAS, TX 75312-2124
PO BOX 122125, DALLAS, TX 75312-2125
PO BOX 122126, DALLAS, TX 75312-2126
PO BOX 122127, DALLAS, TX 75312-2127
PO BOX 122128, DALLAS, TX 75312-2128
PO BOX 122129, DALLAS, TX 75312-2129
PO BOX 122130, DALLAS, TX 75312-2130
PO BOX 122131, DALLAS, TX 75312-2131
PO BOX 122132, DALLAS, TX 75312-2132
PO BOX 122133, DALLAS, TX 75312-2133
PO BOX 122134, DALLAS, TX 75312-2134
PO BOX 122135, DALLAS, TX 75312-2135
PO BOX 122136, DALLAS, TX 75312-2136
PO BOX 122137, DALLAS, TX 75312-2137
PO BOX 122138, DALLAS, TX 75312-2138
PO BOX 122139, DALLAS, TX 75312-2139
PO BOX 122140, DALLAS, TX 75312-2140
PO BOX 122141, DALLAS, TX 75312-2141
PO BOX 122142, DALLAS, TX 75312-2142
PO BOX 122143, DALLAS, TX 75312-2143
PO BOX 122144, DALLAS, TX 75312-2144
PO BOX 122145, DALLAS, TX 75312-2145
PO BOX 122146, DALLAS, TX 75312-2146
PO BOX 122147, DALLAS, TX 75312-2147
PO BOX 122148, DALLAS, TX 75312-2148
PO BOX 122149, DALLAS, TX 75312-2149
PO BOX 122150, DALLAS, TX 75312-2150
PO BOX 122151, DALLAS, TX 75312-2151
PO BOX 122152, DALLAS, TX 75312-2152
PO BOX 122153, DALLAS, TX 75312-2153
PO BOX 122154, DALLAS, TX 75312-2154
PO BOX 122155, DALLAS, TX 75312-2155
PO BOX 122156, DALLAS, TX 75312-2156
PO BOX 122157, DALLAS, TX 75312-2157
PO BOX 122158, DALLAS, TX 75312-2158
PO BOX 122159, DALLAS, TX 75312-2159
PO BOX 122160, DALLAS, TX 75312-2160
PO BOX 122161, DALLAS, TX 75312-2161
PO BOX 122162, DALLAS, TX 75312-2162
PO BOX 122163, DALLAS, TX 75312-2163
PO BOX 122164, DALLAS, TX 75312-2164
PO BOX 122165, DALLAS, TX 75312-2165
PO BOX 122166, DALLAS, TX 75312-2166
PO BOX 122167, DALLAS, TX 75312-2167
PO BOX 122168, DALLAS, TX 75312-2168
PO BOX 122169, DALLAS, TX 75312-2169
PO BOX 122170, DALLAS, TX 75312-2170
PO BOX 122171, DALLAS, TX 75312-2171
PO BOX 122172, DALLAS, TX 75312-2172
PO BOX 122173, DALLAS, TX 75312-2173
PO BOX 122174, DALLAS, TX 75312-2174
PO BOX 122175, DALLAS, TX 75312-2175
PO BOX 122176, DALLAS, TX 75312-2176
PO BOX 122177, DALLAS, TX 75312-2177
PO BOX 122178, DALLAS, TX 75312-2178
PO BOX 122179, DALLAS, TX 75312-2179
PO BOX 122180, DALLAS, TX 75312-2180
PO BOX 122181, DALLAS, TX 75312-2181
PO BOX 122182, DALLAS, TX 75312-2182
PO BOX 122183, DALLAS, TX 75312-2183
PO BOX 122184, DALLAS, TX 75312-2184
PO BOX 122185, DALLAS, TX 75312-2185
PO BOX 122186, DALLAS, TX 75312-2186
PO BOX 122187, DALLAS, TX 75312-2187
PO BOX 122188, DALLAS, TX 75312-2188
PO BOX 122189, DALLAS, TX 75312-2189
PO BOX 122190, DALLAS, TX 75312-2190
PO BOX 122191, DALLAS, TX 75312-2191
PO BOX 122192, DALLAS, TX 75312-2192
PO BOX 122193, DALLAS, TX 75312-2193
PO BOX 122194, DALLAS, TX 75312-2194
PO BOX 122195, DALLAS, TX 75312-2195
PO BOX 122196, DALLAS, TX 75312-2196
PO BOX 122197, DALLAS, TX 75312-2197
PO BOX 122198, DALLAS, TX 75312-2198
PO BOX 122199, DALLAS, TX 75312-2199
PO BOX 122200, DALLAS, TX 75312-2200
PO BOX 122201, DALLAS, TX 75312-2201
PO BOX 122202, DALLAS, TX 75312-2202
PO BOX 122203, DALLAS, TX 75312-2203
PO BOX 122204, DALLAS, TX 75312-2204
PO BOX 122205, DALLAS, TX 75312-2205
PO BOX 122206, DALLAS, TX 75312-2206
PO BOX 122207, DALLAS, TX 75312-2207
PO BOX 122208, DALLAS, TX 75312-2208
PO BOX 122209, DALLAS, TX 75312-2209
PO BOX 122210, DALLAS, TX 75312-2210
PO BOX 122211, DALLAS, TX 75312-2211
PO BOX 122212, DALLAS, TX 75312-2212
PO BOX 122213, DALLAS, TX 75312-2213
PO BOX 122214, DALLAS, TX 75312-2214
PO BOX 122215, DALLAS, TX 75312-2215
PO BOX 122216, DALLAS, TX 75312-2216
PO BOX 122217, DALLAS, TX 75312-2217
PO BOX 122218, DALLAS, TX 75312-2218
PO BOX 122219, DALLAS, TX 75312-2219
PO BOX 122220, DALLAS, TX 75312-2220
PO BOX 122221, DALLAS, TX 75312-2221
PO BOX 122222, DALLAS, TX 75312-2222
PO BOX 122223, DALLAS, TX 75312-2223
PO BOX 122224, DALLAS, TX 75312-2224
PO BOX 122225, DALLAS, TX 75312-2225
PO BOX 122226, DALLAS, TX 75312-2226
PO BOX 122227, DALLAS, TX 75312-2227
PO BOX 122228, DALLAS, TX 75312-2228
PO BOX 122229, DALLAS, TX 75312-2229
PO BOX 122230, DALLAS, TX 75312-2230
PO BOX 122231, DALLAS, TX 75312-2231
PO BOX 122232, DALLAS, TX 75312-2232
PO BOX 122233, DALLAS, TX 75312-2233
PO BOX 122234, DALLAS, TX 75312-2234
PO BOX 122235, DALLAS, TX 75312-2235
PO BOX 122236, DALLAS, TX 75312-2236
PO BOX 122237, DALLAS, TX 75312-2237
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