Ang isang numero ng PO BOX ay maaaring mas mababa sa o higit sa apat na digit. Para sa mga kahon ng post office, ang pangkalahatang panuntunan ay ang bawat kahon ay may sariling ZIP + 4 code.
Ang huling apat na digit ay madalas na isa sa mga sumusunod:
1. Zero kasama ang huling tatlong mga numero ng numero ng kahon (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. Ang huling apat na digit ng numero ng kahon (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. Kung ang numero ng kahon ay mas mababa sa apat na digit, sapat na mga zero ang inihanda sa harap ng numero ng kahon upang makabuo ng isang apat na digit na numero(eg. PO BOX 1, Shreveport LA 71161-0001).
Gayunpaman, walang pare-parehong panuntunan, ang zip code kasama ang apat ay para sa sanggunian lamang, ang ZIP + 4 code ay dapat na indibidwal na tiningnan para sa bawat kahon sa USPS offical website.
PO BOX 10001, WILMINGTON, DE 19850-0001
PO BOX 10002, WILMINGTON, DE 19850-0002
PO BOX 10003, WILMINGTON, DE 19850-0003
PO BOX 10004, WILMINGTON, DE 19850-0004
PO BOX 10005, WILMINGTON, DE 19850-0005
PO BOX 10006, WILMINGTON, DE 19850-0006
PO BOX 10007, WILMINGTON, DE 19850-0007
PO BOX 10008, WILMINGTON, DE 19850-0008
PO BOX 10009, WILMINGTON, DE 19850-0009
PO BOX 10010, WILMINGTON, DE 19850-0010
PO BOX 10011, WILMINGTON, DE 19850-0011
PO BOX 10012, WILMINGTON, DE 19850-0012
PO BOX 10013, WILMINGTON, DE 19850-0013
PO BOX 10014, WILMINGTON, DE 19850-0014
PO BOX 10015, WILMINGTON, DE 19850-0015
PO BOX 10016, WILMINGTON, DE 19850-0016
PO BOX 10017, WILMINGTON, DE 19850-0017
PO BOX 10018, WILMINGTON, DE 19850-0018
PO BOX 10019, WILMINGTON, DE 19850-0019
PO BOX 10020, WILMINGTON, DE 19850-0020
PO BOX 10021, WILMINGTON, DE 19850-0021
PO BOX 10022, WILMINGTON, DE 19850-0022
PO BOX 10023, WILMINGTON, DE 19850-0023
PO BOX 10024, WILMINGTON, DE 19850-0024
PO BOX 10025, WILMINGTON, DE 19850-0025
PO BOX 10026, WILMINGTON, DE 19850-0026
PO BOX 10027, WILMINGTON, DE 19850-0027
PO BOX 10028, WILMINGTON, DE 19850-0028
PO BOX 10029, WILMINGTON, DE 19850-0029
PO BOX 10030, WILMINGTON, DE 19850-0030
PO BOX 10031, WILMINGTON, DE 19850-0031
PO BOX 10032, WILMINGTON, DE 19850-0032
PO BOX 10033, WILMINGTON, DE 19850-0033
PO BOX 10034, WILMINGTON, DE 19850-0034
PO BOX 10035, WILMINGTON, DE 19850-0035
PO BOX 10036, WILMINGTON, DE 19850-0036
PO BOX 10037, WILMINGTON, DE 19850-0037
PO BOX 10038, WILMINGTON, DE 19850-0038
PO BOX 10039, WILMINGTON, DE 19850-0039
PO BOX 10040, WILMINGTON, DE 19850-0040
PO BOX 10041, WILMINGTON, DE 19850-0041
PO BOX 10042, WILMINGTON, DE 19850-0042
PO BOX 10043, WILMINGTON, DE 19850-0043
PO BOX 10044, WILMINGTON, DE 19850-0044
PO BOX 10045, WILMINGTON, DE 19850-0045
PO BOX 10046, WILMINGTON, DE 19850-0046
PO BOX 10047, WILMINGTON, DE 19850-0047
PO BOX 10048, WILMINGTON, DE 19850-0048
PO BOX 10049, WILMINGTON, DE 19850-0049
PO BOX 10050, WILMINGTON, DE 19850-0050
PO BOX 10051, WILMINGTON, DE 19850-0051
PO BOX 10052, WILMINGTON, DE 19850-0052
PO BOX 10053, WILMINGTON, DE 19850-0053
PO BOX 10054, WILMINGTON, DE 19850-0054
PO BOX 10055, WILMINGTON, DE 19850-0055
PO BOX 10056, WILMINGTON, DE 19850-0056
PO BOX 10057, WILMINGTON, DE 19850-0057
PO BOX 10058, WILMINGTON, DE 19850-0058
PO BOX 10059, WILMINGTON, DE 19850-0059
PO BOX 10060, WILMINGTON, DE 19850-0060
PO BOX 10061, WILMINGTON, DE 19850-0061
PO BOX 10062, WILMINGTON, DE 19850-0062
PO BOX 10063, WILMINGTON, DE 19850-0063
PO BOX 10064, WILMINGTON, DE 19850-0064
PO BOX 10065, WILMINGTON, DE 19850-0065
PO BOX 10066, WILMINGTON, DE 19850-0066
PO BOX 10067, WILMINGTON, DE 19850-0067
PO BOX 10068, WILMINGTON, DE 19850-0068
PO BOX 10069, WILMINGTON, DE 19850-0069
PO BOX 10070, WILMINGTON, DE 19850-0070
PO BOX 10071, WILMINGTON, DE 19850-0071
PO BOX 10072, WILMINGTON, DE 19850-0072
PO BOX 10073, WILMINGTON, DE 19850-0073
PO BOX 10074, WILMINGTON, DE 19850-0074
PO BOX 10075, WILMINGTON, DE 19850-0075
PO BOX 10076, WILMINGTON, DE 19850-0076
PO BOX 10077, WILMINGTON, DE 19850-0077
PO BOX 10078, WILMINGTON, DE 19850-0078
PO BOX 10079, WILMINGTON, DE 19850-0079
PO BOX 10080, WILMINGTON, DE 19850-0080
PO BOX 10081, WILMINGTON, DE 19850-0081
PO BOX 10082, WILMINGTON, DE 19850-0082
PO BOX 10083, WILMINGTON, DE 19850-0083
PO BOX 10084, WILMINGTON, DE 19850-0084
PO BOX 10085, WILMINGTON, DE 19850-0085
PO BOX 10086, WILMINGTON, DE 19850-0086
PO BOX 10087, WILMINGTON, DE 19850-0087
PO BOX 10088, WILMINGTON, DE 19850-0088
PO BOX 10089, WILMINGTON, DE 19850-0089
PO BOX 10090, WILMINGTON, DE 19850-0090
PO BOX 10091, WILMINGTON, DE 19850-0091
PO BOX 10092, WILMINGTON, DE 19850-0092
PO BOX 10093, WILMINGTON, DE 19850-0093
PO BOX 10094, WILMINGTON, DE 19850-0094
PO BOX 10095, WILMINGTON, DE 19850-0095
PO BOX 10096, WILMINGTON, DE 19850-0096
PO BOX 10097, WILMINGTON, DE 19850-0097
PO BOX 10098, WILMINGTON, DE 19850-0098
PO BOX 10099, WILMINGTON, DE 19850-0099
PO BOX 10100, WILMINGTON, DE 19850-0100
PO BOX 10101, WILMINGTON, DE 19850-0101
PO BOX 10102, WILMINGTON, DE 19850-0102
PO BOX 10103, WILMINGTON, DE 19850-0103
PO BOX 10104, WILMINGTON, DE 19850-0104
PO BOX 10105, WILMINGTON, DE 19850-0105
PO BOX 10106, WILMINGTON, DE 19850-0106
PO BOX 10107, WILMINGTON, DE 19850-0107
PO BOX 10108, WILMINGTON, DE 19850-0108
PO BOX 10109, WILMINGTON, DE 19850-0109
PO BOX 10110, WILMINGTON, DE 19850-0110
PO BOX 10111, WILMINGTON, DE 19850-0111
PO BOX 10112, WILMINGTON, DE 19850-0112
PO BOX 10113, WILMINGTON, DE 19850-0113
PO BOX 10114, WILMINGTON, DE 19850-0114
PO BOX 10115, WILMINGTON, DE 19850-0115
PO BOX 10116, WILMINGTON, DE 19850-0116
PO BOX 10117, WILMINGTON, DE 19850-0117
PO BOX 10118, WILMINGTON, DE 19850-0118
PO BOX 10119, WILMINGTON, DE 19850-0119
PO BOX 10120, WILMINGTON, DE 19850-0120
PO BOX 10121, WILMINGTON, DE 19850-0121
PO BOX 10122, WILMINGTON, DE 19850-0122
PO BOX 10123, WILMINGTON, DE 19850-0123
PO BOX 10124, WILMINGTON, DE 19850-0124
PO BOX 10125, WILMINGTON, DE 19850-0125
PO BOX 10126, WILMINGTON, DE 19850-0126
PO BOX 10127, WILMINGTON, DE 19850-0127
PO BOX 10128, WILMINGTON, DE 19850-0128
PO BOX 10129, WILMINGTON, DE 19850-0129
PO BOX 10130, WILMINGTON, DE 19850-0130
PO BOX 10131, WILMINGTON, DE 19850-0131
PO BOX 10132, WILMINGTON, DE 19850-0132
PO BOX 10133, WILMINGTON, DE 19850-0133
PO BOX 10134, WILMINGTON, DE 19850-0134
PO BOX 10135, WILMINGTON, DE 19850-0135
PO BOX 10136, WILMINGTON, DE 19850-0136
PO BOX 10137, WILMINGTON, DE 19850-0137
PO BOX 10138, WILMINGTON, DE 19850-0138
PO BOX 10139, WILMINGTON, DE 19850-0139
PO BOX 10140, WILMINGTON, DE 19850-0140
PO BOX 10141, WILMINGTON, DE 19850-0141
PO BOX 10142, WILMINGTON, DE 19850-0142
PO BOX 10143, WILMINGTON, DE 19850-0143
PO BOX 10144, WILMINGTON, DE 19850-0144
PO BOX 10145, WILMINGTON, DE 19850-0145
PO BOX 10146, WILMINGTON, DE 19850-0146
PO BOX 10147, WILMINGTON, DE 19850-0147
PO BOX 10148, WILMINGTON, DE 19850-0148
PO BOX 10149, WILMINGTON, DE 19850-0149
PO BOX 10150, WILMINGTON, DE 19850-0150
PO BOX 10151, WILMINGTON, DE 19850-0151
PO BOX 10152, WILMINGTON, DE 19850-0152
PO BOX 10153, WILMINGTON, DE 19850-0153
PO BOX 10154, WILMINGTON, DE 19850-0154
PO BOX 10155, WILMINGTON, DE 19850-0155
PO BOX 10156, WILMINGTON, DE 19850-0156
PO BOX 10157, WILMINGTON, DE 19850-0157
PO BOX 10158, WILMINGTON, DE 19850-0158
PO BOX 10159, WILMINGTON, DE 19850-0159
PO BOX 10160, WILMINGTON, DE 19850-0160
PO BOX 10161, WILMINGTON, DE 19850-0161
PO BOX 10162, WILMINGTON, DE 19850-0162
PO BOX 10163, WILMINGTON, DE 19850-0163
PO BOX 10164, WILMINGTON, DE 19850-0164
PO BOX 10165, WILMINGTON, DE 19850-0165
PO BOX 10166, WILMINGTON, DE 19850-0166
PO BOX 10167, WILMINGTON, DE 19850-0167
PO BOX 10168, WILMINGTON, DE 19850-0168
PO BOX 10169, WILMINGTON, DE 19850-0169
PO BOX 10170, WILMINGTON, DE 19850-0170
PO BOX 10171, WILMINGTON, DE 19850-0171
PO BOX 10172, WILMINGTON, DE 19850-0172
PO BOX 10173, WILMINGTON, DE 19850-0173
PO BOX 10174, WILMINGTON, DE 19850-0174
PO BOX 10175, WILMINGTON, DE 19850-0175
PO BOX 10176, WILMINGTON, DE 19850-0176
PO BOX 10177, WILMINGTON, DE 19850-0177
PO BOX 10178, WILMINGTON, DE 19850-0178
PO BOX 10179, WILMINGTON, DE 19850-0179
PO BOX 10180, WILMINGTON, DE 19850-0180
PO BOX 10181, WILMINGTON, DE 19850-0181
PO BOX 10182, WILMINGTON, DE 19850-0182
PO BOX 10183, WILMINGTON, DE 19850-0183
PO BOX 10184, WILMINGTON, DE 19850-0184
PO BOX 10185, WILMINGTON, DE 19850-0185
PO BOX 10186, WILMINGTON, DE 19850-0186
PO BOX 10187, WILMINGTON, DE 19850-0187
PO BOX 10188, WILMINGTON, DE 19850-0188
PO BOX 10189, WILMINGTON, DE 19850-0189
PO BOX 10190, WILMINGTON, DE 19850-0190
PO BOX 10191, WILMINGTON, DE 19850-0191
PO BOX 10192, WILMINGTON, DE 19850-0192
PO BOX 10193, WILMINGTON, DE 19850-0193
PO BOX 10194, WILMINGTON, DE 19850-0194
PO BOX 10195, WILMINGTON, DE 19850-0195
PO BOX 10196, WILMINGTON, DE 19850-0196
PO BOX 10197, WILMINGTON, DE 19850-0197
PO BOX 10198, WILMINGTON, DE 19850-0198
PO BOX 10199, WILMINGTON, DE 19850-0199
PO BOX 10200, WILMINGTON, DE 19850-0200
PO BOX 10201, WILMINGTON, DE 19850-0201
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