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 52000, PHOENIX, AZ 85072-2000
PO BOX 52001, PHOENIX, AZ 85072-2001
PO BOX 52002, PHOENIX, AZ 85072-2002
PO BOX 52003, PHOENIX, AZ 85072-2003
PO BOX 52004, PHOENIX, AZ 85072-2004
PO BOX 52005, PHOENIX, AZ 85072-2005
PO BOX 52006, PHOENIX, AZ 85072-2006
PO BOX 52007, PHOENIX, AZ 85072-2007
PO BOX 52008, PHOENIX, AZ 85072-2008
PO BOX 52009, PHOENIX, AZ 85072-2009
PO BOX 52010, PHOENIX, AZ 85072-2010
PO BOX 52011, PHOENIX, AZ 85072-2011
PO BOX 52012, PHOENIX, AZ 85072-2012
PO BOX 52013, PHOENIX, AZ 85072-2013
PO BOX 52014, PHOENIX, AZ 85072-2014
PO BOX 52015, PHOENIX, AZ 85072-2015
PO BOX 52016, PHOENIX, AZ 85072-2016
PO BOX 52017, PHOENIX, AZ 85072-2017
PO BOX 52018, PHOENIX, AZ 85072-2018
PO BOX 52019, PHOENIX, AZ 85072-2019
PO BOX 52020, PHOENIX, AZ 85072-2020
PO BOX 52021, PHOENIX, AZ 85072-2021
PO BOX 52022, PHOENIX, AZ 85072-2022
PO BOX 52023, PHOENIX, AZ 85072-2023
PO BOX 52024, PHOENIX, AZ 85072-2024
PO BOX 52025, PHOENIX, AZ 85072-2025
PO BOX 52026, PHOENIX, AZ 85072-2026
PO BOX 52027, PHOENIX, AZ 85072-2027
PO BOX 52028, PHOENIX, AZ 85072-2028
PO BOX 52029, PHOENIX, AZ 85072-2029
PO BOX 52030, PHOENIX, AZ 85072-2030
PO BOX 52031, PHOENIX, AZ 85072-2031
PO BOX 52032, PHOENIX, AZ 85072-2032
PO BOX 52033, PHOENIX, AZ 85072-2033
PO BOX 52034, PHOENIX, AZ 85072-2034
PO BOX 52035, PHOENIX, AZ 85072-2035
PO BOX 52036, PHOENIX, AZ 85072-2036
PO BOX 52037, PHOENIX, AZ 85072-2037
PO BOX 52038, PHOENIX, AZ 85072-2038
PO BOX 52039, PHOENIX, AZ 85072-2039
PO BOX 52040, PHOENIX, AZ 85072-2040
PO BOX 52041, PHOENIX, AZ 85072-2041
PO BOX 52042, PHOENIX, AZ 85072-2042
PO BOX 52043, PHOENIX, AZ 85072-2043
PO BOX 52044, PHOENIX, AZ 85072-2044
PO BOX 52045, PHOENIX, AZ 85072-2045
PO BOX 52046, PHOENIX, AZ 85072-2046
PO BOX 52047, PHOENIX, AZ 85072-2047
PO BOX 52048, PHOENIX, AZ 85072-2048
PO BOX 52049, PHOENIX, AZ 85072-2049
PO BOX 52050, PHOENIX, AZ 85072-2050
PO BOX 52051, PHOENIX, AZ 85072-2051
PO BOX 52052, PHOENIX, AZ 85072-2052
PO BOX 52053, PHOENIX, AZ 85072-2053
PO BOX 52054, PHOENIX, AZ 85072-2054
PO BOX 52055, PHOENIX, AZ 85072-2055
PO BOX 52056, PHOENIX, AZ 85072-2056
PO BOX 52057, PHOENIX, AZ 85072-2057
PO BOX 52058, PHOENIX, AZ 85072-2058
PO BOX 52059, PHOENIX, AZ 85072-2059
PO BOX 52060, PHOENIX, AZ 85072-2060
PO BOX 52061, PHOENIX, AZ 85072-2061
PO BOX 52062, PHOENIX, AZ 85072-2062
PO BOX 52063, PHOENIX, AZ 85072-2063
PO BOX 52064, PHOENIX, AZ 85072-2064
PO BOX 52065, PHOENIX, AZ 85072-2065
PO BOX 52066, PHOENIX, AZ 85072-2066
PO BOX 52067, PHOENIX, AZ 85072-2067
PO BOX 52068, PHOENIX, AZ 85072-2068
PO BOX 52069, PHOENIX, AZ 85072-2069
PO BOX 52070, PHOENIX, AZ 85072-2070
PO BOX 52071, PHOENIX, AZ 85072-2071
PO BOX 52072, PHOENIX, AZ 85072-2072
PO BOX 52073, PHOENIX, AZ 85072-2073
PO BOX 52074, PHOENIX, AZ 85072-2074
PO BOX 52075, PHOENIX, AZ 85072-2075
PO BOX 52076, PHOENIX, AZ 85072-2076
PO BOX 52077, PHOENIX, AZ 85072-2077
PO BOX 52078, PHOENIX, AZ 85072-2078
PO BOX 52079, PHOENIX, AZ 85072-2079
PO BOX 52080, PHOENIX, AZ 85072-2080
PO BOX 52081, PHOENIX, AZ 85072-2081
PO BOX 52082, PHOENIX, AZ 85072-2082
PO BOX 52083, PHOENIX, AZ 85072-2083
PO BOX 52084, PHOENIX, AZ 85072-2084
PO BOX 52085, PHOENIX, AZ 85072-2085
PO BOX 52086, PHOENIX, AZ 85072-2086
PO BOX 52087, PHOENIX, AZ 85072-2087
PO BOX 52088, PHOENIX, AZ 85072-2088
PO BOX 52089, PHOENIX, AZ 85072-2089
PO BOX 52090, PHOENIX, AZ 85072-2090
PO BOX 52091, PHOENIX, AZ 85072-2091
PO BOX 52092, PHOENIX, AZ 85072-2092
PO BOX 52093, PHOENIX, AZ 85072-2093
PO BOX 52094, PHOENIX, AZ 85072-2094
PO BOX 52095, PHOENIX, AZ 85072-2095
PO BOX 52096, PHOENIX, AZ 85072-2096
PO BOX 52097, PHOENIX, AZ 85072-2097
PO BOX 52098, PHOENIX, AZ 85072-2098
PO BOX 52099, PHOENIX, AZ 85072-2099
PO BOX 52100, PHOENIX, AZ 85072-2100
PO BOX 52101, PHOENIX, AZ 85072-2101
PO BOX 52102, PHOENIX, AZ 85072-2102
PO BOX 52103, PHOENIX, AZ 85072-2103
PO BOX 52104, PHOENIX, AZ 85072-2104
PO BOX 52105, PHOENIX, AZ 85072-2105
PO BOX 52106, PHOENIX, AZ 85072-2106
PO BOX 52107, PHOENIX, AZ 85072-2107
PO BOX 52108, PHOENIX, AZ 85072-2108
PO BOX 52109, PHOENIX, AZ 85072-2109
PO BOX 52110, PHOENIX, AZ 85072-2110
PO BOX 52111, PHOENIX, AZ 85072-2111
PO BOX 52112, PHOENIX, AZ 85072-2112
PO BOX 52113, PHOENIX, AZ 85072-2113
PO BOX 52114, PHOENIX, AZ 85072-2114
PO BOX 52115, PHOENIX, AZ 85072-2115
PO BOX 52116, PHOENIX, AZ 85072-2116
PO BOX 52117, PHOENIX, AZ 85072-2117
PO BOX 52118, PHOENIX, AZ 85072-2118
PO BOX 52119, PHOENIX, AZ 85072-2119
PO BOX 52120, PHOENIX, AZ 85072-2120
PO BOX 52121, PHOENIX, AZ 85072-2121
PO BOX 52122, PHOENIX, AZ 85072-2122
PO BOX 52123, PHOENIX, AZ 85072-2123
PO BOX 52124, PHOENIX, AZ 85072-2124
PO BOX 52125, PHOENIX, AZ 85072-2125
PO BOX 52126, PHOENIX, AZ 85072-2126
PO BOX 52127, PHOENIX, AZ 85072-2127
PO BOX 52128, PHOENIX, AZ 85072-2128
PO BOX 52129, PHOENIX, AZ 85072-2129
PO BOX 52130, PHOENIX, AZ 85072-2130
PO BOX 52131, PHOENIX, AZ 85072-2131
PO BOX 52132, PHOENIX, AZ 85072-2132
PO BOX 52133, PHOENIX, AZ 85072-2133
PO BOX 52134, PHOENIX, AZ 85072-2134
PO BOX 52135, PHOENIX, AZ 85072-2135
PO BOX 52136, PHOENIX, AZ 85072-2136
PO BOX 52137, PHOENIX, AZ 85072-2137
PO BOX 52138, PHOENIX, AZ 85072-2138
PO BOX 52139, PHOENIX, AZ 85072-2139
PO BOX 52140, PHOENIX, AZ 85072-2140
PO BOX 52141, PHOENIX, AZ 85072-2141
PO BOX 52142, PHOENIX, AZ 85072-2142
PO BOX 52143, PHOENIX, AZ 85072-2143
PO BOX 52144, PHOENIX, AZ 85072-2144
PO BOX 52145, PHOENIX, AZ 85072-2145
PO BOX 52146, PHOENIX, AZ 85072-2146
PO BOX 52147, PHOENIX, AZ 85072-2147
PO BOX 52148, PHOENIX, AZ 85072-2148
PO BOX 52149, PHOENIX, AZ 85072-2149
PO BOX 52150, PHOENIX, AZ 85072-2150
PO BOX 52151, PHOENIX, AZ 85072-2151
PO BOX 52152, PHOENIX, AZ 85072-2152
PO BOX 52153, PHOENIX, AZ 85072-2153
PO BOX 52154, PHOENIX, AZ 85072-2154
PO BOX 52155, PHOENIX, AZ 85072-2155
PO BOX 52156, PHOENIX, AZ 85072-2156
PO BOX 52157, PHOENIX, AZ 85072-2157
PO BOX 52158, PHOENIX, AZ 85072-2158
PO BOX 52159, PHOENIX, AZ 85072-2159
PO BOX 52160, PHOENIX, AZ 85072-2160
PO BOX 52161, PHOENIX, AZ 85072-2161
PO BOX 52162, PHOENIX, AZ 85072-2162
PO BOX 52163, PHOENIX, AZ 85072-2163
PO BOX 52164, PHOENIX, AZ 85072-2164
PO BOX 52165, PHOENIX, AZ 85072-2165
PO BOX 52166, PHOENIX, AZ 85072-2166
PO BOX 52167, PHOENIX, AZ 85072-2167
PO BOX 52168, PHOENIX, AZ 85072-2168
PO BOX 52169, PHOENIX, AZ 85072-2169
PO BOX 52170, PHOENIX, AZ 85072-2170
PO BOX 52171, PHOENIX, AZ 85072-2171
PO BOX 52172, PHOENIX, AZ 85072-2172
PO BOX 52173, PHOENIX, AZ 85072-2173
PO BOX 52174, PHOENIX, AZ 85072-2174
PO BOX 52175, PHOENIX, AZ 85072-2175
PO BOX 52176, PHOENIX, AZ 85072-2176
PO BOX 52177, PHOENIX, AZ 85072-2177
PO BOX 52178, PHOENIX, AZ 85072-2178
PO BOX 52179, PHOENIX, AZ 85072-2179
PO BOX 52180, PHOENIX, AZ 85072-2180
PO BOX 52181, PHOENIX, AZ 85072-2181
PO BOX 52182, PHOENIX, AZ 85072-2182
PO BOX 52183, PHOENIX, AZ 85072-2183
PO BOX 52184, PHOENIX, AZ 85072-2184
PO BOX 52185, PHOENIX, AZ 85072-2185
PO BOX 52186, PHOENIX, AZ 85072-2186
PO BOX 52187, PHOENIX, AZ 85072-2187
PO BOX 52188, PHOENIX, AZ 85072-2188
PO BOX 52189, PHOENIX, AZ 85072-2189
PO BOX 52190, PHOENIX, AZ 85072-2190
PO BOX 52191, PHOENIX, AZ 85072-2191
PO BOX 52192, PHOENIX, AZ 85072-2192
PO BOX 52193, PHOENIX, AZ 85072-2193
PO BOX 52194, PHOENIX, AZ 85072-2194
PO BOX 52195, PHOENIX, AZ 85072-2195
PO BOX 52196, PHOENIX, AZ 85072-2196
PO BOX 52197, PHOENIX, AZ 85072-2197
PO BOX 52198, PHOENIX, AZ 85072-2198
PO BOX 52199, PHOENIX, AZ 85072-2199
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