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 941, NEW YORK, NY 10116-0941
PO BOX 942, NEW YORK, NY 10116-0942
PO BOX 943, NEW YORK, NY 10116-0943
PO BOX 944, NEW YORK, NY 10116-0944
PO BOX 945, NEW YORK, NY 10116-0945
PO BOX 946, NEW YORK, NY 10116-0946
PO BOX 947, NEW YORK, NY 10116-0947
PO BOX 948, NEW YORK, NY 10116-0948
PO BOX 949, NEW YORK, NY 10116-0949
PO BOX 950, NEW YORK, NY 10116-0950
PO BOX 951, NEW YORK, NY 10116-0951
PO BOX 952, NEW YORK, NY 10116-0952
PO BOX 953, NEW YORK, NY 10116-0953
PO BOX 954, NEW YORK, NY 10116-0954
PO BOX 955, NEW YORK, NY 10116-0955
PO BOX 956, NEW YORK, NY 10116-0956
PO BOX 957, NEW YORK, NY 10116-0957
PO BOX 958, NEW YORK, NY 10116-0958
PO BOX 959, NEW YORK, NY 10116-0959
PO BOX 960, NEW YORK, NY 10116-0960
PO BOX 961, NEW YORK, NY 10116-0961
PO BOX 962, NEW YORK, NY 10116-0962
PO BOX 963, NEW YORK, NY 10116-0963
PO BOX 964, NEW YORK, NY 10116-0964
PO BOX 965, NEW YORK, NY 10116-0965
PO BOX 966, NEW YORK, NY 10116-0966
PO BOX 967, NEW YORK, NY 10116-0967
PO BOX 968, NEW YORK, NY 10116-0968
PO BOX 969, NEW YORK, NY 10116-0969
PO BOX 970, NEW YORK, NY 10116-0970
PO BOX 971, NEW YORK, NY 10116-0971
PO BOX 972, NEW YORK, NY 10116-0972
PO BOX 973, NEW YORK, NY 10116-0973
PO BOX 974, NEW YORK, NY 10116-0974
PO BOX 975, NEW YORK, NY 10116-0975
PO BOX 976, NEW YORK, NY 10116-0976
PO BOX 977, NEW YORK, NY 10116-0977
PO BOX 978, NEW YORK, NY 10116-0978
PO BOX 979, NEW YORK, NY 10116-0979
PO BOX 980, NEW YORK, NY 10116-0980
PO BOX 981, NEW YORK, NY 10116-0981
PO BOX 982, NEW YORK, NY 10116-0982
PO BOX 983, NEW YORK, NY 10116-0983
PO BOX 984, NEW YORK, NY 10116-0984
PO BOX 985, NEW YORK, NY 10116-0985
PO BOX 986, NEW YORK, NY 10116-0986
PO BOX 987, NEW YORK, NY 10116-0987
PO BOX 988, NEW YORK, NY 10116-0988
PO BOX 989, NEW YORK, NY 10116-0989
PO BOX 990, NEW YORK, NY 10116-0990
PO BOX 991, NEW YORK, NY 10116-0991
PO BOX 992, NEW YORK, NY 10116-0992
PO BOX 993, NEW YORK, NY 10116-0993
PO BOX 994, NEW YORK, NY 10116-0994
PO BOX 995, NEW YORK, NY 10116-0995
PO BOX 996, NEW YORK, NY 10116-0996
PO BOX 997, NEW YORK, NY 10116-0997
PO BOX 998, NEW YORK, NY 10116-0998
PO BOX 999, NEW YORK, NY 10116-0999
PO BOX 1000, NEW YORK, NY 10116-1000
PO BOX 1001, NEW YORK, NY 10116-1001
PO BOX 1002, NEW YORK, NY 10116-1002
PO BOX 1003, NEW YORK, NY 10116-1003
PO BOX 1004, NEW YORK, NY 10116-1004
PO BOX 1005, NEW YORK, NY 10116-1005
PO BOX 1006, NEW YORK, NY 10116-1006
PO BOX 1007, NEW YORK, NY 10116-1007
PO BOX 1008, NEW YORK, NY 10116-1008
PO BOX 1009, NEW YORK, NY 10116-1009
PO BOX 1010, NEW YORK, NY 10116-1010
PO BOX 1011, NEW YORK, NY 10116-1011
PO BOX 1012, NEW YORK, NY 10116-1012
PO BOX 1013, NEW YORK, NY 10116-1013
PO BOX 1014, NEW YORK, NY 10116-1014
PO BOX 1015, NEW YORK, NY 10116-1015
PO BOX 1016, NEW YORK, NY 10116-1016
PO BOX 1017, NEW YORK, NY 10116-1017
PO BOX 1018, NEW YORK, NY 10116-1018
PO BOX 1019, NEW YORK, NY 10116-1019
PO BOX 1020, NEW YORK, NY 10116-1020
PO BOX 1021, NEW YORK, NY 10116-1021
PO BOX 1022, NEW YORK, NY 10116-1022
PO BOX 1023, NEW YORK, NY 10116-1023
PO BOX 1024, NEW YORK, NY 10116-1024
PO BOX 1025, NEW YORK, NY 10116-1025
PO BOX 1026, NEW YORK, NY 10116-1026
PO BOX 1027, NEW YORK, NY 10116-1027
PO BOX 1028, NEW YORK, NY 10116-1028
PO BOX 1029, NEW YORK, NY 10116-1029
PO BOX 1030, NEW YORK, NY 10116-1030
PO BOX 1031, NEW YORK, NY 10116-1031
PO BOX 1032, NEW YORK, NY 10116-1032
PO BOX 1033, NEW YORK, NY 10116-1033
PO BOX 1034, NEW YORK, NY 10116-1034
PO BOX 1035, NEW YORK, NY 10116-1035
PO BOX 1036, NEW YORK, NY 10116-1036
PO BOX 1037, NEW YORK, NY 10116-1037
PO BOX 1038, NEW YORK, NY 10116-1038
PO BOX 1039, NEW YORK, NY 10116-1039
PO BOX 1040, NEW YORK, NY 10116-1040
PO BOX 1041, NEW YORK, NY 10116-1041
PO BOX 1042, NEW YORK, NY 10116-1042
PO BOX 1043, NEW YORK, NY 10116-1043
PO BOX 1044, NEW YORK, NY 10116-1044
PO BOX 1045, NEW YORK, NY 10116-1045
PO BOX 1046, NEW YORK, NY 10116-1046
PO BOX 1047, NEW YORK, NY 10116-1047
PO BOX 1048, NEW YORK, NY 10116-1048
PO BOX 1049, NEW YORK, NY 10116-1049
PO BOX 1050, NEW YORK, NY 10116-1050
PO BOX 1051, NEW YORK, NY 10116-1051
PO BOX 1052, NEW YORK, NY 10116-1052
PO BOX 1053, NEW YORK, NY 10116-1053
PO BOX 1054, NEW YORK, NY 10116-1054
PO BOX 1055, NEW YORK, NY 10116-1055
PO BOX 1056, NEW YORK, NY 10116-1056
PO BOX 1057, NEW YORK, NY 10116-1057
PO BOX 1058, NEW YORK, NY 10116-1058
PO BOX 1059, NEW YORK, NY 10116-1059
PO BOX 1060, NEW YORK, NY 10116-1060
PO BOX 1061, NEW YORK, NY 10116-1061
PO BOX 1062, NEW YORK, NY 10116-1062
PO BOX 1063, NEW YORK, NY 10116-1063
PO BOX 1064, NEW YORK, NY 10116-1064
PO BOX 1065, NEW YORK, NY 10116-1065
PO BOX 1066, NEW YORK, NY 10116-1066
PO BOX 1067, NEW YORK, NY 10116-1067
PO BOX 1068, NEW YORK, NY 10116-1068
PO BOX 1069, NEW YORK, NY 10116-1069
PO BOX 1070, NEW YORK, NY 10116-1070
PO BOX 1071, NEW YORK, NY 10116-1071
PO BOX 1072, NEW YORK, NY 10116-1072
PO BOX 1073, NEW YORK, NY 10116-1073
PO BOX 1074, NEW YORK, NY 10116-1074
PO BOX 1075, NEW YORK, NY 10116-1075
PO BOX 1076, NEW YORK, NY 10116-1076
PO BOX 1077, NEW YORK, NY 10116-1077
PO BOX 1078, NEW YORK, NY 10116-1078
PO BOX 1079, NEW YORK, NY 10116-1079
PO BOX 1080, NEW YORK, NY 10116-1080
PO BOX 1081, NEW YORK, NY 10116-1081
PO BOX 1082, NEW YORK, NY 10116-1082
PO BOX 1083, NEW YORK, NY 10116-1083
PO BOX 1084, NEW YORK, NY 10116-1084
PO BOX 1085, NEW YORK, NY 10116-1085
PO BOX 1086, NEW YORK, NY 10116-1086
PO BOX 1087, NEW YORK, NY 10116-1087
PO BOX 1088, NEW YORK, NY 10116-1088
PO BOX 1089, NEW YORK, NY 10116-1089
PO BOX 1090, NEW YORK, NY 10116-1090
PO BOX 1091, NEW YORK, NY 10116-1091
PO BOX 1092, NEW YORK, NY 10116-1092
PO BOX 1093, NEW YORK, NY 10116-1093
PO BOX 1094, NEW YORK, NY 10116-1094
PO BOX 1095, NEW YORK, NY 10116-1095
PO BOX 1096, NEW YORK, NY 10116-1096
PO BOX 1097, NEW YORK, NY 10116-1097
PO BOX 1098, NEW YORK, NY 10116-1098
PO BOX 1099, NEW YORK, NY 10116-1099
PO BOX 1100, NEW YORK, NY 10116-1100
PO BOX 1101, NEW YORK, NY 10116-1101
PO BOX 1102, NEW YORK, NY 10116-1102
PO BOX 1103, NEW YORK, NY 10116-1103
PO BOX 1104, NEW YORK, NY 10116-1104
PO BOX 1105, NEW YORK, NY 10116-1105
PO BOX 1106, NEW YORK, NY 10116-1106
PO BOX 1107, NEW YORK, NY 10116-1107
PO BOX 1108, NEW YORK, NY 10116-1108
PO BOX 1109, NEW YORK, NY 10116-1109
PO BOX 1110, NEW YORK, NY 10116-1110
PO BOX 1111, NEW YORK, NY 10116-1111
PO BOX 1112, NEW YORK, NY 10116-1112
PO BOX 1113, NEW YORK, NY 10116-1113
PO BOX 1114, NEW YORK, NY 10116-1114
PO BOX 1115, NEW YORK, NY 10116-1115
PO BOX 1116, NEW YORK, NY 10116-1116
PO BOX 1117, NEW YORK, NY 10116-1117
PO BOX 1118, NEW YORK, NY 10116-1118
PO BOX 1119, NEW YORK, NY 10116-1119
PO BOX 1120, NEW YORK, NY 10116-1120
PO BOX 1121, NEW YORK, NY 10116-1121
PO BOX 1122, NEW YORK, NY 10116-1122
PO BOX 1123, NEW YORK, NY 10116-1123
PO BOX 1124, NEW YORK, NY 10116-1124
PO BOX 1125, NEW YORK, NY 10116-1125
PO BOX 1126, NEW YORK, NY 10116-1126
PO BOX 1127, NEW YORK, NY 10116-1127
PO BOX 1128, NEW YORK, NY 10116-1128
PO BOX 1129, NEW YORK, NY 10116-1129
PO BOX 1130, NEW YORK, NY 10116-1130
PO BOX 1131, NEW YORK, NY 10116-1131
PO BOX 1132, NEW YORK, NY 10116-1132
PO BOX 1133, NEW YORK, NY 10116-1133
PO BOX 1134, NEW YORK, NY 10116-1134
PO BOX 1135, NEW YORK, NY 10116-1135
PO BOX 1136, NEW YORK, NY 10116-1136
PO BOX 1137, NEW YORK, NY 10116-1137
PO BOX 1138, NEW YORK, NY 10116-1138
PO BOX 1139, NEW YORK, NY 10116-1139
PO BOX 1140, NEW YORK, NY 10116-1140
PO BOX 1141, NEW YORK, NY 10116-1141
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