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 15012, WILMINGTON, DE 19850-5012
PO BOX 15013, WILMINGTON, DE 19850-5013
PO BOX 15014, WILMINGTON, DE 19850-5014
PO BOX 15015, WILMINGTON, DE 19850-5015
PO BOX 15016, WILMINGTON, DE 19850-5016
PO BOX 15017, WILMINGTON, DE 19850-5017
PO BOX 15018, WILMINGTON, DE 19850-5018
PO BOX 15019, WILMINGTON, DE 19850-5019
PO BOX 15020, WILMINGTON, DE 19850-5020
PO BOX 15021, WILMINGTON, DE 19850-5021
PO BOX 15022, WILMINGTON, DE 19850-5022
PO BOX 15023, WILMINGTON, DE 19850-5023
PO BOX 15024, WILMINGTON, DE 19850-5024
PO BOX 15025, WILMINGTON, DE 19850-5025
PO BOX 15026, WILMINGTON, DE 19850-5026
PO BOX 15027, WILMINGTON, DE 19850-5027
PO BOX 15028, WILMINGTON, DE 19850-5028
PO BOX 15029, WILMINGTON, DE 19850-5029
PO BOX 15030, WILMINGTON, DE 19850-5030
PO BOX 15031, WILMINGTON, DE 19850-5031
PO BOX 15032, WILMINGTON, DE 19850-5032
PO BOX 15033, WILMINGTON, DE 19850-5033
PO BOX 15034, WILMINGTON, DE 19850-5034
PO BOX 15035, WILMINGTON, DE 19850-5035
PO BOX 15036, WILMINGTON, DE 19850-5036
PO BOX 15037, WILMINGTON, DE 19850-5037
PO BOX 15038, WILMINGTON, DE 19850-5038
PO BOX 15039, WILMINGTON, DE 19850-5039
PO BOX 15040, WILMINGTON, DE 19850-5040
PO BOX 15041, WILMINGTON, DE 19850-5041
PO BOX 15042, WILMINGTON, DE 19850-5042
PO BOX 15043, WILMINGTON, DE 19850-5043
PO BOX 15044, WILMINGTON, DE 19850-5044
PO BOX 15045, WILMINGTON, DE 19850-5045
PO BOX 15046, WILMINGTON, DE 19850-5046
PO BOX 15047, WILMINGTON, DE 19850-5047
PO BOX 15048, WILMINGTON, DE 19850-5048
PO BOX 15049, WILMINGTON, DE 19850-5049
PO BOX 15050, WILMINGTON, DE 19850-5050
PO BOX 15051, WILMINGTON, DE 19850-5051
PO BOX 15052, WILMINGTON, DE 19850-5052
PO BOX 15053, WILMINGTON, DE 19850-5053
PO BOX 15054, WILMINGTON, DE 19850-5054
PO BOX 15055, WILMINGTON, DE 19850-5055
PO BOX 15056, WILMINGTON, DE 19850-5056
PO BOX 15057, WILMINGTON, DE 19850-5057
PO BOX 15058, WILMINGTON, DE 19850-5058
PO BOX 15059, WILMINGTON, DE 19850-5059
PO BOX 15060, WILMINGTON, DE 19850-5060
PO BOX 15061, WILMINGTON, DE 19850-5061
PO BOX 15062, WILMINGTON, DE 19850-5062
PO BOX 15063, WILMINGTON, DE 19850-5063
PO BOX 15064, WILMINGTON, DE 19850-5064
PO BOX 15065, WILMINGTON, DE 19850-5065
PO BOX 15066, WILMINGTON, DE 19850-5066
PO BOX 15067, WILMINGTON, DE 19850-5067
PO BOX 15068, WILMINGTON, DE 19850-5068
PO BOX 15069, WILMINGTON, DE 19850-5069
PO BOX 15070, WILMINGTON, DE 19850-5070
PO BOX 15071, WILMINGTON, DE 19850-5071
PO BOX 15072, WILMINGTON, DE 19850-5072
PO BOX 15073, WILMINGTON, DE 19850-5073
PO BOX 15074, WILMINGTON, DE 19850-5074
PO BOX 15075, WILMINGTON, DE 19850-5075
PO BOX 15076, WILMINGTON, DE 19850-5076
PO BOX 15077, WILMINGTON, DE 19850-5077
PO BOX 15078, WILMINGTON, DE 19850-5078
PO BOX 15079, WILMINGTON, DE 19850-5079
PO BOX 15080, WILMINGTON, DE 19850-5080
PO BOX 15081, WILMINGTON, DE 19850-5081
PO BOX 15082, WILMINGTON, DE 19850-5082
PO BOX 15083, WILMINGTON, DE 19850-5083
PO BOX 15084, WILMINGTON, DE 19850-5084
PO BOX 15085, WILMINGTON, DE 19850-5085
PO BOX 15086, WILMINGTON, DE 19850-5086
PO BOX 15087, WILMINGTON, DE 19850-5087
PO BOX 15088, WILMINGTON, DE 19850-5088
PO BOX 15089, WILMINGTON, DE 19850-5089
PO BOX 15090, WILMINGTON, DE 19850-5090
PO BOX 15091, WILMINGTON, DE 19850-5091
PO BOX 15092, WILMINGTON, DE 19850-5092
PO BOX 15093, WILMINGTON, DE 19850-5093
PO BOX 15094, WILMINGTON, DE 19850-5094
PO BOX 15095, WILMINGTON, DE 19850-5095
PO BOX 15096, WILMINGTON, DE 19850-5096
PO BOX 15097, WILMINGTON, DE 19850-5097
PO BOX 15098, WILMINGTON, DE 19850-5098
PO BOX 15099, WILMINGTON, DE 19850-5099
PO BOX 15100, WILMINGTON, DE 19850-5100
PO BOX 15101, WILMINGTON, DE 19850-5101
PO BOX 15102, WILMINGTON, DE 19850-5102
PO BOX 15103, WILMINGTON, DE 19850-5103
PO BOX 15104, WILMINGTON, DE 19850-5104
PO BOX 15105, WILMINGTON, DE 19850-5105
PO BOX 15106, WILMINGTON, DE 19850-5106
PO BOX 15107, WILMINGTON, DE 19850-5107
PO BOX 15108, WILMINGTON, DE 19850-5108
PO BOX 15109, WILMINGTON, DE 19850-5109
PO BOX 15110, WILMINGTON, DE 19850-5110
PO BOX 15111, WILMINGTON, DE 19850-5111
PO BOX 15112, WILMINGTON, DE 19850-5112
PO BOX 15113, WILMINGTON, DE 19850-5113
PO BOX 15114, WILMINGTON, DE 19850-5114
PO BOX 15115, WILMINGTON, DE 19850-5115
PO BOX 15116, WILMINGTON, DE 19850-5116
PO BOX 15117, WILMINGTON, DE 19850-5117
PO BOX 15118, WILMINGTON, DE 19850-5118
PO BOX 15119, WILMINGTON, DE 19850-5119
PO BOX 15120, WILMINGTON, DE 19850-5120
PO BOX 15121, WILMINGTON, DE 19850-5121
PO BOX 15122, WILMINGTON, DE 19850-5122
PO BOX 15123, WILMINGTON, DE 19850-5123
PO BOX 15124, WILMINGTON, DE 19850-5124
PO BOX 15125, WILMINGTON, DE 19850-5125
PO BOX 15126, WILMINGTON, DE 19850-5126
PO BOX 15127, WILMINGTON, DE 19850-5127
PO BOX 15128, WILMINGTON, DE 19850-5128
PO BOX 15129, WILMINGTON, DE 19850-5129
PO BOX 15130, WILMINGTON, DE 19850-5130
PO BOX 15131, WILMINGTON, DE 19850-5131
PO BOX 15132, WILMINGTON, DE 19850-5132
PO BOX 15133, WILMINGTON, DE 19850-5133
PO BOX 15134, WILMINGTON, DE 19850-5134
PO BOX 15135, WILMINGTON, DE 19850-5135
PO BOX 15136, WILMINGTON, DE 19850-5136
PO BOX 15137, WILMINGTON, DE 19850-5137
PO BOX 15138, WILMINGTON, DE 19850-5138
PO BOX 15139, WILMINGTON, DE 19850-5139
PO BOX 15140, WILMINGTON, DE 19850-5140
PO BOX 15141, WILMINGTON, DE 19850-5141
PO BOX 15142, WILMINGTON, DE 19850-5142
PO BOX 15143, WILMINGTON, DE 19850-5143
PO BOX 15144, WILMINGTON, DE 19850-5144
PO BOX 15145, WILMINGTON, DE 19850-5145
PO BOX 15146, WILMINGTON, DE 19850-5146
PO BOX 15147, WILMINGTON, DE 19850-5147
PO BOX 15148, WILMINGTON, DE 19850-5148
PO BOX 15149, WILMINGTON, DE 19850-5149
PO BOX 15150, WILMINGTON, DE 19850-5150
PO BOX 15151, WILMINGTON, DE 19850-5151
PO BOX 15152, WILMINGTON, DE 19850-5152
PO BOX 15153, WILMINGTON, DE 19850-5153
PO BOX 15154, WILMINGTON, DE 19850-5154
PO BOX 15155, WILMINGTON, DE 19850-5155
PO BOX 15156, WILMINGTON, DE 19850-5156
PO BOX 15157, WILMINGTON, DE 19850-5157
PO BOX 15158, WILMINGTON, DE 19850-5158
PO BOX 15159, WILMINGTON, DE 19850-5159
PO BOX 15160, WILMINGTON, DE 19850-5160
PO BOX 15161, WILMINGTON, DE 19850-5161
PO BOX 15162, WILMINGTON, DE 19850-5162
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