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 47711, DISTRICT HEIGHTS, MD 20753-7711
PO BOX 47712, DISTRICT HEIGHTS, MD 20753-7712
PO BOX 47713, DISTRICT HEIGHTS, MD 20753-7713
PO BOX 47714, DISTRICT HEIGHTS, MD 20753-7714
PO BOX 47715, DISTRICT HEIGHTS, MD 20753-7715
PO BOX 47716, DISTRICT HEIGHTS, MD 20753-7716
PO BOX 47717, DISTRICT HEIGHTS, MD 20753-7717
PO BOX 47718, DISTRICT HEIGHTS, MD 20753-7718
PO BOX 47719, DISTRICT HEIGHTS, MD 20753-7719
PO BOX 47720, DISTRICT HEIGHTS, MD 20753-7720
PO BOX 47721, DISTRICT HEIGHTS, MD 20753-7721
PO BOX 47722, DISTRICT HEIGHTS, MD 20753-7722
PO BOX 47723, DISTRICT HEIGHTS, MD 20753-7723
PO BOX 47724, DISTRICT HEIGHTS, MD 20753-7724
PO BOX 47725, DISTRICT HEIGHTS, MD 20753-7725
PO BOX 47726, DISTRICT HEIGHTS, MD 20753-7726
PO BOX 47727, DISTRICT HEIGHTS, MD 20753-7727
PO BOX 47728, DISTRICT HEIGHTS, MD 20753-7728
PO BOX 47729, DISTRICT HEIGHTS, MD 20753-7729
PO BOX 47730, DISTRICT HEIGHTS, MD 20753-7730
PO BOX 47731, DISTRICT HEIGHTS, MD 20753-7731
PO BOX 47732, DISTRICT HEIGHTS, MD 20753-7732
PO BOX 47733, DISTRICT HEIGHTS, MD 20753-7733
PO BOX 47734, DISTRICT HEIGHTS, MD 20753-7734
PO BOX 47735, DISTRICT HEIGHTS, MD 20753-7735
PO BOX 47736, DISTRICT HEIGHTS, MD 20753-7736
PO BOX 47737, DISTRICT HEIGHTS, MD 20753-7737
PO BOX 47738, DISTRICT HEIGHTS, MD 20753-7738
PO BOX 47739, DISTRICT HEIGHTS, MD 20753-7739
PO BOX 47740, DISTRICT HEIGHTS, MD 20753-7740
PO BOX 47741, DISTRICT HEIGHTS, MD 20753-7741
PO BOX 47742, DISTRICT HEIGHTS, MD 20753-7742
PO BOX 47743, DISTRICT HEIGHTS, MD 20753-7743
PO BOX 47744, DISTRICT HEIGHTS, MD 20753-7744
PO BOX 47745, DISTRICT HEIGHTS, MD 20753-7745
PO BOX 47746, DISTRICT HEIGHTS, MD 20753-7746
PO BOX 47747, DISTRICT HEIGHTS, MD 20753-7747
PO BOX 47748, DISTRICT HEIGHTS, MD 20753-7748
PO BOX 47749, DISTRICT HEIGHTS, MD 20753-7749
PO BOX 47750, DISTRICT HEIGHTS, MD 20753-7750
PO BOX 47751, DISTRICT HEIGHTS, MD 20753-7751
PO BOX 47752, DISTRICT HEIGHTS, MD 20753-7752
PO BOX 47753, DISTRICT HEIGHTS, MD 20753-7753
PO BOX 47754, DISTRICT HEIGHTS, MD 20753-7754
PO BOX 47755, DISTRICT HEIGHTS, MD 20753-7755
PO BOX 47756, DISTRICT HEIGHTS, MD 20753-7756
PO BOX 47757, DISTRICT HEIGHTS, MD 20753-7757
PO BOX 47758, DISTRICT HEIGHTS, MD 20753-7758
PO BOX 47759, DISTRICT HEIGHTS, MD 20753-7759
PO BOX 47760, DISTRICT HEIGHTS, MD 20753-7760
PO BOX 47761, DISTRICT HEIGHTS, MD 20753-7761
PO BOX 47762, DISTRICT HEIGHTS, MD 20753-7762
PO BOX 47763, DISTRICT HEIGHTS, MD 20753-7763
PO BOX 47764, DISTRICT HEIGHTS, MD 20753-7764
PO BOX 47765, DISTRICT HEIGHTS, MD 20753-7765
PO BOX 47766, DISTRICT HEIGHTS, MD 20753-7766
PO BOX 47767, DISTRICT HEIGHTS, MD 20753-7767
PO BOX 47768, DISTRICT HEIGHTS, MD 20753-7768
PO BOX 47769, DISTRICT HEIGHTS, MD 20753-7769
PO BOX 47770, DISTRICT HEIGHTS, MD 20753-7770
PO BOX 47771, DISTRICT HEIGHTS, MD 20753-7771
PO BOX 47772, DISTRICT HEIGHTS, MD 20753-7772
PO BOX 47773, DISTRICT HEIGHTS, MD 20753-7773
PO BOX 47774, DISTRICT HEIGHTS, MD 20753-7774
PO BOX 47775, DISTRICT HEIGHTS, MD 20753-7775
PO BOX 47776, DISTRICT HEIGHTS, MD 20753-7776
PO BOX 47777, DISTRICT HEIGHTS, MD 20753-7777
PO BOX 47778, DISTRICT HEIGHTS, MD 20753-7778
PO BOX 47779, DISTRICT HEIGHTS, MD 20753-7779
PO BOX 47780, DISTRICT HEIGHTS, MD 20753-7780
PO BOX 47781, DISTRICT HEIGHTS, MD 20753-7781
PO BOX 47782, DISTRICT HEIGHTS, MD 20753-7782
PO BOX 47783, DISTRICT HEIGHTS, MD 20753-7783
PO BOX 47784, DISTRICT HEIGHTS, MD 20753-7784
PO BOX 47785, DISTRICT HEIGHTS, MD 20753-7785
PO BOX 47786, DISTRICT HEIGHTS, MD 20753-7786
PO BOX 47787, DISTRICT HEIGHTS, MD 20753-7787
PO BOX 47788, DISTRICT HEIGHTS, MD 20753-7788
PO BOX 47789, DISTRICT HEIGHTS, MD 20753-7789
PO BOX 47790, DISTRICT HEIGHTS, MD 20753-7790
PO BOX 47791, DISTRICT HEIGHTS, MD 20753-7791
PO BOX 47792, DISTRICT HEIGHTS, MD 20753-7792
PO BOX 47793, DISTRICT HEIGHTS, MD 20753-7793
PO BOX 47794, DISTRICT HEIGHTS, MD 20753-7794
PO BOX 47795, DISTRICT HEIGHTS, MD 20753-7795
PO BOX 47796, DISTRICT HEIGHTS, MD 20753-7796
PO BOX 47797, DISTRICT HEIGHTS, MD 20753-7797
PO BOX 47798, DISTRICT HEIGHTS, MD 20753-7798
PO BOX 47799, DISTRICT HEIGHTS, MD 20753-7799
PO BOX 47800, DISTRICT HEIGHTS, MD 20753-7800
PO BOX 47801, DISTRICT HEIGHTS, MD 20753-7801
PO BOX 47802, DISTRICT HEIGHTS, MD 20753-7802
PO BOX 47803, DISTRICT HEIGHTS, MD 20753-7803
PO BOX 47804, DISTRICT HEIGHTS, MD 20753-7804
PO BOX 47805, DISTRICT HEIGHTS, MD 20753-7805
PO BOX 47806, DISTRICT HEIGHTS, MD 20753-7806
PO BOX 47807, DISTRICT HEIGHTS, MD 20753-7807
PO BOX 47808, DISTRICT HEIGHTS, MD 20753-7808
PO BOX 47809, DISTRICT HEIGHTS, MD 20753-7809
PO BOX 47810, DISTRICT HEIGHTS, MD 20753-7810
PO BOX 47811, DISTRICT HEIGHTS, MD 20753-7811
PO BOX 47812, DISTRICT HEIGHTS, MD 20753-7812
PO BOX 47813, DISTRICT HEIGHTS, MD 20753-7813
PO BOX 47814, DISTRICT HEIGHTS, MD 20753-7814
PO BOX 47815, DISTRICT HEIGHTS, MD 20753-7815
PO BOX 47816, DISTRICT HEIGHTS, MD 20753-7816
PO BOX 47817, DISTRICT HEIGHTS, MD 20753-7817
PO BOX 47818, DISTRICT HEIGHTS, MD 20753-7818
PO BOX 47819, DISTRICT HEIGHTS, MD 20753-7819
PO BOX 47820, DISTRICT HEIGHTS, MD 20753-7820
PO BOX 47821, DISTRICT HEIGHTS, MD 20753-7821
PO BOX 47822, DISTRICT HEIGHTS, MD 20753-7822
PO BOX 47823, DISTRICT HEIGHTS, MD 20753-7823
PO BOX 47824, DISTRICT HEIGHTS, MD 20753-7824
PO BOX 47825, DISTRICT HEIGHTS, MD 20753-7825
PO BOX 47826, DISTRICT HEIGHTS, MD 20753-7826
PO BOX 47827, DISTRICT HEIGHTS, MD 20753-7827
PO BOX 47828, DISTRICT HEIGHTS, MD 20753-7828
PO BOX 47829, DISTRICT HEIGHTS, MD 20753-7829
PO BOX 47830, DISTRICT HEIGHTS, MD 20753-7830
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