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 1001, HIGH ROLLS MOUNTAIN PARK, NM 88325-1001
PO BOX 1002, HIGH ROLLS MOUNTAIN PARK, NM 88325-1002
PO BOX 1003, HIGH ROLLS MOUNTAIN PARK, NM 88325-1003
PO BOX 1004, HIGH ROLLS MOUNTAIN PARK, NM 88325-1004
PO BOX 1005, HIGH ROLLS MOUNTAIN PARK, NM 88325-1005
PO BOX 1006, HIGH ROLLS MOUNTAIN PARK, NM 88325-1006
PO BOX 1007, HIGH ROLLS MOUNTAIN PARK, NM 88325-1007
PO BOX 1008, HIGH ROLLS MOUNTAIN PARK, NM 88325-1008
PO BOX 1009, HIGH ROLLS MOUNTAIN PARK, NM 88325-1009
PO BOX 1010, HIGH ROLLS MOUNTAIN PARK, NM 88325-1010
PO BOX 1011, HIGH ROLLS MOUNTAIN PARK, NM 88325-1011
PO BOX 1012, HIGH ROLLS MOUNTAIN PARK, NM 88325-1012
PO BOX 1013, HIGH ROLLS MOUNTAIN PARK, NM 88325-1013
PO BOX 1014, HIGH ROLLS MOUNTAIN PARK, NM 88325-1014
PO BOX 1015, HIGH ROLLS MOUNTAIN PARK, NM 88325-1015
PO BOX 1016, HIGH ROLLS MOUNTAIN PARK, NM 88325-1016
PO BOX 1017, HIGH ROLLS MOUNTAIN PARK, NM 88325-1017
PO BOX 1018, HIGH ROLLS MOUNTAIN PARK, NM 88325-1018
PO BOX 1019, HIGH ROLLS MOUNTAIN PARK, NM 88325-1019
PO BOX 1020, HIGH ROLLS MOUNTAIN PARK, NM 88325-1020
PO BOX 1021, HIGH ROLLS MOUNTAIN PARK, NM 88325-1021
PO BOX 1022, HIGH ROLLS MOUNTAIN PARK, NM 88325-1022
PO BOX 1023, HIGH ROLLS MOUNTAIN PARK, NM 88325-1023
PO BOX 1024, HIGH ROLLS MOUNTAIN PARK, NM 88325-1024
PO BOX 1025, HIGH ROLLS MOUNTAIN PARK, NM 88325-1025
PO BOX 1026, HIGH ROLLS MOUNTAIN PARK, NM 88325-1026
PO BOX 1027, HIGH ROLLS MOUNTAIN PARK, NM 88325-1027
PO BOX 1028, HIGH ROLLS MOUNTAIN PARK, NM 88325-1028
PO BOX 1029, HIGH ROLLS MOUNTAIN PARK, NM 88325-1029
PO BOX 1030, HIGH ROLLS MOUNTAIN PARK, NM 88325-1030
PO BOX 1031, HIGH ROLLS MOUNTAIN PARK, NM 88325-1031
PO BOX 1032, HIGH ROLLS MOUNTAIN PARK, NM 88325-1032
PO BOX 1033, HIGH ROLLS MOUNTAIN PARK, NM 88325-1033
PO BOX 1034, HIGH ROLLS MOUNTAIN PARK, NM 88325-1034
PO BOX 1035, HIGH ROLLS MOUNTAIN PARK, NM 88325-1035
PO BOX 1036, HIGH ROLLS MOUNTAIN PARK, NM 88325-1036
PO BOX 1037, HIGH ROLLS MOUNTAIN PARK, NM 88325-1037
PO BOX 1038, HIGH ROLLS MOUNTAIN PARK, NM 88325-1038
PO BOX 1039, HIGH ROLLS MOUNTAIN PARK, NM 88325-1039
PO BOX 1040, HIGH ROLLS MOUNTAIN PARK, NM 88325-1040
PO BOX 1041, HIGH ROLLS MOUNTAIN PARK, NM 88325-1041
PO BOX 1042, HIGH ROLLS MOUNTAIN PARK, NM 88325-1042
PO BOX 1043, HIGH ROLLS MOUNTAIN PARK, NM 88325-1043
PO BOX 1044, HIGH ROLLS MOUNTAIN PARK, NM 88325-1044
PO BOX 1045, HIGH ROLLS MOUNTAIN PARK, NM 88325-1045
PO BOX 1046, HIGH ROLLS MOUNTAIN PARK, NM 88325-1046
PO BOX 1047, HIGH ROLLS MOUNTAIN PARK, NM 88325-1047
PO BOX 1048, HIGH ROLLS MOUNTAIN PARK, NM 88325-1048
PO BOX 1049, HIGH ROLLS MOUNTAIN PARK, NM 88325-1049
PO BOX 1050, HIGH ROLLS MOUNTAIN PARK, NM 88325-1050
PO BOX 1051, HIGH ROLLS MOUNTAIN PARK, NM 88325-1051
PO BOX 1052, HIGH ROLLS MOUNTAIN PARK, NM 88325-1052
PO BOX 1053, HIGH ROLLS MOUNTAIN PARK, NM 88325-1053
PO BOX 1054, HIGH ROLLS MOUNTAIN PARK, NM 88325-1054
PO BOX 1055, HIGH ROLLS MOUNTAIN PARK, NM 88325-1055
PO BOX 1056, HIGH ROLLS MOUNTAIN PARK, NM 88325-1056
PO BOX 1057, HIGH ROLLS MOUNTAIN PARK, NM 88325-1057
PO BOX 1058, HIGH ROLLS MOUNTAIN PARK, NM 88325-1058
PO BOX 1059, HIGH ROLLS MOUNTAIN PARK, NM 88325-1059
PO BOX 1060, HIGH ROLLS MOUNTAIN PARK, NM 88325-1060
PO BOX 1061, HIGH ROLLS MOUNTAIN PARK, NM 88325-1061
PO BOX 1062, HIGH ROLLS MOUNTAIN PARK, NM 88325-1062
PO BOX 1063, HIGH ROLLS MOUNTAIN PARK, NM 88325-1063
PO BOX 1064, HIGH ROLLS MOUNTAIN PARK, NM 88325-1064
PO BOX 1065, HIGH ROLLS MOUNTAIN PARK, NM 88325-1065
PO BOX 1066, HIGH ROLLS MOUNTAIN PARK, NM 88325-1066
PO BOX 1067, HIGH ROLLS MOUNTAIN PARK, NM 88325-1067
PO BOX 1068, HIGH ROLLS MOUNTAIN PARK, NM 88325-1068
PO BOX 1069, HIGH ROLLS MOUNTAIN PARK, NM 88325-1069
PO BOX 1070, HIGH ROLLS MOUNTAIN PARK, NM 88325-1070
PO BOX 1071, HIGH ROLLS MOUNTAIN PARK, NM 88325-1071
PO BOX 1072, HIGH ROLLS MOUNTAIN PARK, NM 88325-1072
PO BOX 1073, HIGH ROLLS MOUNTAIN PARK, NM 88325-1073
PO BOX 1074, HIGH ROLLS MOUNTAIN PARK, NM 88325-1074
PO BOX 1075, HIGH ROLLS MOUNTAIN PARK, NM 88325-1075
PO BOX 1076, HIGH ROLLS MOUNTAIN PARK, NM 88325-1076
PO BOX 1077, HIGH ROLLS MOUNTAIN PARK, NM 88325-1077
PO BOX 1078, HIGH ROLLS MOUNTAIN PARK, NM 88325-1078
PO BOX 1079, HIGH ROLLS MOUNTAIN PARK, NM 88325-1079
PO BOX 1080, HIGH ROLLS MOUNTAIN PARK, NM 88325-1080
PO BOX 1081, HIGH ROLLS MOUNTAIN PARK, NM 88325-1081
PO BOX 1082, HIGH ROLLS MOUNTAIN PARK, NM 88325-1082
PO BOX 1083, HIGH ROLLS MOUNTAIN PARK, NM 88325-1083
PO BOX 1084, HIGH ROLLS MOUNTAIN PARK, NM 88325-1084
PO BOX 1085, HIGH ROLLS MOUNTAIN PARK, NM 88325-1085
PO BOX 1086, HIGH ROLLS MOUNTAIN PARK, NM 88325-1086
PO BOX 1087, HIGH ROLLS MOUNTAIN PARK, NM 88325-1087
PO BOX 1088, HIGH ROLLS MOUNTAIN PARK, NM 88325-1088
PO BOX 1089, HIGH ROLLS MOUNTAIN PARK, NM 88325-1089
PO BOX 1090, HIGH ROLLS MOUNTAIN PARK, NM 88325-1090
PO BOX 1091, HIGH ROLLS MOUNTAIN PARK, NM 88325-1091
PO BOX 1092, HIGH ROLLS MOUNTAIN PARK, NM 88325-1092
PO BOX 1093, HIGH ROLLS MOUNTAIN PARK, NM 88325-1093
PO BOX 1094, HIGH ROLLS MOUNTAIN PARK, NM 88325-1094
PO BOX 1095, HIGH ROLLS MOUNTAIN PARK, NM 88325-1095
PO BOX 1096, HIGH ROLLS MOUNTAIN PARK, NM 88325-1096
PO BOX 1097, HIGH ROLLS MOUNTAIN PARK, NM 88325-1097
PO BOX 1098, HIGH ROLLS MOUNTAIN PARK, NM 88325-1098
PO BOX 1099, HIGH ROLLS MOUNTAIN PARK, NM 88325-1099
PO BOX 1100, HIGH ROLLS MOUNTAIN PARK, NM 88325-1100
PO BOX 1101, HIGH ROLLS MOUNTAIN PARK, NM 88325-1101
PO BOX 1102, HIGH ROLLS MOUNTAIN PARK, NM 88325-1102
PO BOX 1103, HIGH ROLLS MOUNTAIN PARK, NM 88325-1103
PO BOX 1104, HIGH ROLLS MOUNTAIN PARK, NM 88325-1104
PO BOX 1105, HIGH ROLLS MOUNTAIN PARK, NM 88325-1105
PO BOX 1106, HIGH ROLLS MOUNTAIN PARK, NM 88325-1106
PO BOX 1107, HIGH ROLLS MOUNTAIN PARK, NM 88325-1107
PO BOX 1108, HIGH ROLLS MOUNTAIN PARK, NM 88325-1108
PO BOX 1109, HIGH ROLLS MOUNTAIN PARK, NM 88325-1109
PO BOX 1110, HIGH ROLLS MOUNTAIN PARK, NM 88325-1110
PO BOX 1111, HIGH ROLLS MOUNTAIN PARK, NM 88325-1111
PO BOX 1112, HIGH ROLLS MOUNTAIN PARK, NM 88325-1112
PO BOX 1113, HIGH ROLLS MOUNTAIN PARK, NM 88325-1113
PO BOX 1114, HIGH ROLLS MOUNTAIN PARK, NM 88325-1114
PO BOX 1115, HIGH ROLLS MOUNTAIN PARK, NM 88325-1115
PO BOX 1116, HIGH ROLLS MOUNTAIN PARK, NM 88325-1116
PO BOX 1117, HIGH ROLLS MOUNTAIN PARK, NM 88325-1117
PO BOX 1118, HIGH ROLLS MOUNTAIN PARK, NM 88325-1118
PO BOX 1119, HIGH ROLLS MOUNTAIN PARK, NM 88325-1119
PO BOX 1120, HIGH ROLLS MOUNTAIN PARK, NM 88325-1120
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