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 12091, SANTA BARBARA, CA 93107-2091
PO BOX 12092, SANTA BARBARA, CA 93107-2092
PO BOX 12093, SANTA BARBARA, CA 93107-2093
PO BOX 12094, SANTA BARBARA, CA 93107-2094
PO BOX 12095, SANTA BARBARA, CA 93107-2095
PO BOX 12096, SANTA BARBARA, CA 93107-2096
PO BOX 12097, SANTA BARBARA, CA 93107-2097
PO BOX 12098, SANTA BARBARA, CA 93107-2098
PO BOX 12099, SANTA BARBARA, CA 93107-2099
PO BOX 12100, SANTA BARBARA, CA 93107-2100
PO BOX 12101, SANTA BARBARA, CA 93107-2101
PO BOX 12102, SANTA BARBARA, CA 93107-2102
PO BOX 12103, SANTA BARBARA, CA 93107-2103
PO BOX 12104, SANTA BARBARA, CA 93107-2104
PO BOX 12105, SANTA BARBARA, CA 93107-2105
PO BOX 12106, SANTA BARBARA, CA 93107-2106
PO BOX 12107, SANTA BARBARA, CA 93107-2107
PO BOX 12108, SANTA BARBARA, CA 93107-2108
PO BOX 12109, SANTA BARBARA, CA 93107-2109
PO BOX 12110, SANTA BARBARA, CA 93107-2110
PO BOX 12111, SANTA BARBARA, CA 93107-2111
PO BOX 12112, SANTA BARBARA, CA 93107-2112
PO BOX 12113, SANTA BARBARA, CA 93107-2113
PO BOX 12114, SANTA BARBARA, CA 93107-2114
PO BOX 12115, SANTA BARBARA, CA 93107-2115
PO BOX 12116, SANTA BARBARA, CA 93107-2116
PO BOX 12117, SANTA BARBARA, CA 93107-2117
PO BOX 12118, SANTA BARBARA, CA 93107-2118
PO BOX 12119, SANTA BARBARA, CA 93107-2119
PO BOX 12120, SANTA BARBARA, CA 93107-2120
PO BOX 12121, SANTA BARBARA, CA 93107-2121
PO BOX 12122, SANTA BARBARA, CA 93107-2122
PO BOX 12123, SANTA BARBARA, CA 93107-2123
PO BOX 12124, SANTA BARBARA, CA 93107-2124
PO BOX 12125, SANTA BARBARA, CA 93107-2125
PO BOX 12126, SANTA BARBARA, CA 93107-2126
PO BOX 12127, SANTA BARBARA, CA 93107-2127
PO BOX 12128, SANTA BARBARA, CA 93107-2128
PO BOX 12129, SANTA BARBARA, CA 93107-2129
PO BOX 12130, SANTA BARBARA, CA 93107-2130
PO BOX 12131, SANTA BARBARA, CA 93107-2131
PO BOX 12132, SANTA BARBARA, CA 93107-2132
PO BOX 12133, SANTA BARBARA, CA 93107-2133
PO BOX 12134, SANTA BARBARA, CA 93107-2134
PO BOX 12135, SANTA BARBARA, CA 93107-2135
PO BOX 12136, SANTA BARBARA, CA 93107-2136
PO BOX 12137, SANTA BARBARA, CA 93107-2137
PO BOX 12138, SANTA BARBARA, CA 93107-2138
PO BOX 12139, SANTA BARBARA, CA 93107-2139
PO BOX 12140, SANTA BARBARA, CA 93107-2140
PO BOX 12141, SANTA BARBARA, CA 93107-2141
PO BOX 12142, SANTA BARBARA, CA 93107-2142
PO BOX 12143, SANTA BARBARA, CA 93107-2143
PO BOX 12144, SANTA BARBARA, CA 93107-2144
PO BOX 12145, SANTA BARBARA, CA 93107-2145
PO BOX 12146, SANTA BARBARA, CA 93107-2146
PO BOX 12147, SANTA BARBARA, CA 93107-2147
PO BOX 12148, SANTA BARBARA, CA 93107-2148
PO BOX 12149, SANTA BARBARA, CA 93107-2149
PO BOX 12150, SANTA BARBARA, CA 93107-2150
PO BOX 12151, SANTA BARBARA, CA 93107-2151
PO BOX 12152, SANTA BARBARA, CA 93107-2152
PO BOX 12153, SANTA BARBARA, CA 93107-2153
PO BOX 12154, SANTA BARBARA, CA 93107-2154
PO BOX 12155, SANTA BARBARA, CA 93107-2155
PO BOX 12156, SANTA BARBARA, CA 93107-2156
PO BOX 12157, SANTA BARBARA, CA 93107-2157
PO BOX 12158, SANTA BARBARA, CA 93107-2158
PO BOX 12159, SANTA BARBARA, CA 93107-2159
PO BOX 12160, SANTA BARBARA, CA 93107-2160
PO BOX 12161, SANTA BARBARA, CA 93107-2161
PO BOX 12162, SANTA BARBARA, CA 93107-2162
PO BOX 12163, SANTA BARBARA, CA 93107-2163
PO BOX 12164, SANTA BARBARA, CA 93107-2164
PO BOX 12165, SANTA BARBARA, CA 93107-2165
PO BOX 12166, SANTA BARBARA, CA 93107-2166
PO BOX 12167, SANTA BARBARA, CA 93107-2167
PO BOX 12168, SANTA BARBARA, CA 93107-2168
PO BOX 12169, SANTA BARBARA, CA 93107-2169
PO BOX 12170, SANTA BARBARA, CA 93107-2170
PO BOX 12171, SANTA BARBARA, CA 93107-2171
PO BOX 12172, SANTA BARBARA, CA 93107-2172
PO BOX 12173, SANTA BARBARA, CA 93107-2173
PO BOX 12174, SANTA BARBARA, CA 93107-2174
PO BOX 12175, SANTA BARBARA, CA 93107-2175
PO BOX 12176, SANTA BARBARA, CA 93107-2176
PO BOX 12177, SANTA BARBARA, CA 93107-2177
PO BOX 12178, SANTA BARBARA, CA 93107-2178
PO BOX 12179, SANTA BARBARA, CA 93107-2179
PO BOX 12180, SANTA BARBARA, CA 93107-2180
PO BOX 12181, SANTA BARBARA, CA 93107-2181
PO BOX 12182, SANTA BARBARA, CA 93107-2182
PO BOX 12183, SANTA BARBARA, CA 93107-2183
PO BOX 12184, SANTA BARBARA, CA 93107-2184
PO BOX 12185, SANTA BARBARA, CA 93107-2185
PO BOX 12186, SANTA BARBARA, CA 93107-2186
PO BOX 12187, SANTA BARBARA, CA 93107-2187
PO BOX 12188, SANTA BARBARA, CA 93107-2188
PO BOX 12189, SANTA BARBARA, CA 93107-2189
PO BOX 12190, SANTA BARBARA, CA 93107-2190
PO BOX 12191, SANTA BARBARA, CA 93107-2191
PO BOX 12192, SANTA BARBARA, CA 93107-2192
PO BOX 12193, SANTA BARBARA, CA 93107-2193
PO BOX 12194, SANTA BARBARA, CA 93107-2194
PO BOX 12195, SANTA BARBARA, CA 93107-2195
PO BOX 12196, SANTA BARBARA, CA 93107-2196
PO BOX 12197, SANTA BARBARA, CA 93107-2197
PO BOX 12198, SANTA BARBARA, CA 93107-2198
PO BOX 12199, SANTA BARBARA, CA 93107-2199
PO BOX 12200, SANTA BARBARA, CA 93107-2200
PO BOX 12201, SANTA BARBARA, CA 93107-2201
PO BOX 12202, SANTA BARBARA, CA 93107-2202
PO BOX 12203, SANTA BARBARA, CA 93107-2203
PO BOX 12204, SANTA BARBARA, CA 93107-2204
PO BOX 12205, SANTA BARBARA, CA 93107-2205
PO BOX 12206, SANTA BARBARA, CA 93107-2206
PO BOX 12207, SANTA BARBARA, CA 93107-2207
PO BOX 12208, SANTA BARBARA, CA 93107-2208
PO BOX 12209, SANTA BARBARA, CA 93107-2209
PO BOX 12210, SANTA BARBARA, CA 93107-2210
PO BOX 12211, SANTA BARBARA, CA 93107-2211
PO BOX 12212, SANTA BARBARA, CA 93107-2212
PO BOX 12213, SANTA BARBARA, CA 93107-2213
PO BOX 12214, SANTA BARBARA, CA 93107-2214
PO BOX 12215, SANTA BARBARA, CA 93107-2215
PO BOX 12216, SANTA BARBARA, CA 93107-2216
PO BOX 12217, SANTA BARBARA, CA 93107-2217
PO BOX 12218, SANTA BARBARA, CA 93107-2218
PO BOX 12219, SANTA BARBARA, CA 93107-2219
PO BOX 12220, SANTA BARBARA, CA 93107-2220
PO BOX 12221, SANTA BARBARA, CA 93107-2221
PO BOX 12222, SANTA BARBARA, CA 93107-2222
PO BOX 12223, SANTA BARBARA, CA 93107-2223
PO BOX 12224, SANTA BARBARA, CA 93107-2224
PO BOX 12225, SANTA BARBARA, CA 93107-2225
PO BOX 12226, SANTA BARBARA, CA 93107-2226
PO BOX 12227, SANTA BARBARA, CA 93107-2227
PO BOX 12228, SANTA BARBARA, CA 93107-2228
PO BOX 12229, SANTA BARBARA, CA 93107-2229
PO BOX 12230, SANTA BARBARA, CA 93107-2230
PO BOX 12231, SANTA BARBARA, CA 93107-2231
PO BOX 12232, SANTA BARBARA, CA 93107-2232
PO BOX 12233, SANTA BARBARA, CA 93107-2233
PO BOX 12234, SANTA BARBARA, CA 93107-2234
PO BOX 12235, SANTA BARBARA, CA 93107-2235
PO BOX 12236, SANTA BARBARA, CA 93107-2236
PO BOX 12237, SANTA BARBARA, CA 93107-2237
PO BOX 12238, SANTA BARBARA, CA 93107-2238
PO BOX 12239, SANTA BARBARA, CA 93107-2239
PO BOX 12240, SANTA BARBARA, CA 93107-2240
PO BOX 12241, SANTA BARBARA, CA 93107-2241
PO BOX 12242, SANTA BARBARA, CA 93107-2242
PO BOX 12243, SANTA BARBARA, CA 93107-2243
PO BOX 12244, SANTA BARBARA, CA 93107-2244
PO BOX 12245, SANTA BARBARA, CA 93107-2245
PO BOX 12246, SANTA BARBARA, CA 93107-2246
PO BOX 12247, SANTA BARBARA, CA 93107-2247
PO BOX 12248, SANTA BARBARA, CA 93107-2248
PO BOX 12249, SANTA BARBARA, CA 93107-2249
PO BOX 12250, SANTA BARBARA, CA 93107-2250
PO BOX 12251, SANTA BARBARA, CA 93107-2251
PO BOX 12252, SANTA BARBARA, CA 93107-2252
PO BOX 12253, SANTA BARBARA, CA 93107-2253
PO BOX 12254, SANTA BARBARA, CA 93107-2254
PO BOX 12255, SANTA BARBARA, CA 93107-2255
PO BOX 12256, SANTA BARBARA, CA 93107-2256
PO BOX 12257, SANTA BARBARA, CA 93107-2257
PO BOX 12258, SANTA BARBARA, CA 93107-2258
PO BOX 12259, SANTA BARBARA, CA 93107-2259
PO BOX 12260, SANTA BARBARA, CA 93107-2260
PO BOX 12261, SANTA BARBARA, CA 93107-2261
PO BOX 12262, SANTA BARBARA, CA 93107-2262
PO BOX 12263, SANTA BARBARA, CA 93107-2263
PO BOX 12264, SANTA BARBARA, CA 93107-2264
PO BOX 12265, SANTA BARBARA, CA 93107-2265
PO BOX 12266, SANTA BARBARA, CA 93107-2266
PO BOX 12267, SANTA BARBARA, CA 93107-2267
PO BOX 12268, SANTA BARBARA, CA 93107-2268
PO BOX 12269, SANTA BARBARA, CA 93107-2269
PO BOX 12270, SANTA BARBARA, CA 93107-2270
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