| 0 | Connecticut(CT), Massachusetts(MA), Maine（ME）, New Hampshire(NH), New Jersey(NJ), Puerto Rico(PR), Rhode Island(RI), Vermont(VT), United States Virgin Islands(VI), militarypostalAgency (Europe) (AE), Naval Post Office (Europe)(AE) |
| 1 | Delaware(DE), New York state(NY), Pennsylvania{PA) |
| 2 | Washington, D.C(DC), Maryland(MD), North Carolina(NC), South Carolina(SC), Virginia(VA), West Virginia(WV) |
| 3 | Alabama(AL), Florida(FL), Georgia(GA), Mississippi(MS), Tennessee, (TN), Military Post Office (United States)(AA), Navy Postal Service (United States)(AA) |
| 4 | Indiana（IN）, Kentucky(KY), Michigan(MI), Ohio(OH) |
| 5 | Iowa(IA), Minnesota(MN), Montana（MT）, North Dakota(ND), South Dakota(SD), Wisconsin(WI) |
| 6 | Illinois(IL), Kansas(KS), Missouri(MO), Nebraska(NE) |
| 7 | Arkansas(AR), Louisiana(LA), Oklahoma state(OK), Texas(TX) |
| 8 | Arizona(AZ), Colorado(CO), Idaho（ID）, New Mexico(NM), Nevada(NV), Utah(UT), Wyoming(WY) |
| 9 | Alaska(AK), American Samoa(AS), California(CA), Micronesiafederal(FM), Guam(GU), Hawaii(HI), Republic of the Marshall Islands(MH), Northern Mariana Islands(MP), Oregon(OR), Palau(PW), Washington(WA), Military Post Office (Pacific)(AP), Naval Post Office (Pacific)(AP) |