3-digit ZIP Codes: 6-7

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600 IL Palatine	601 IL Carol Stream	602 IL* Evanston	603 IL Oak Park	604 IL Chicago Southwest	605 IL Fox Valley	606 IL* Chicago Main (1)	607 IL Chicago Main (2)	608 IL Chicago Main (3)	609 IL Kankakee
610 IL Rockford Vicinity	611 IL* Rockford Main	612 IL Rock Island	613 IL La Salle	614 IL Galesburg	615 IL Peoria Vicinity	616 IL* Peoria Main	617 IL Bloomington	618 IL Champaign North	619 IL Champaign South
620 IL† St. Louis (MO) Northeast	621 Not in use	622 IL† St. Louis (MO) Southeast	623 IL Quincy	624 IL Effingham	625 IL Springfield East	626 IL Springfield West	627 IL* Springfield Main	628 IL Centralia	629 IL Carbondale
630 MO Saint Louis Southwest	631 MO* Saint Louis Main	632 Not in use	633 MO Saint Louis Formerly St. Charles	634 MO† Quincy (IL) Formerly Hannibal	635 MO† Quincy (IL) Formerly Kirksville	636 MO Cape Girardeau Formerly Flat River	637 MO Cape Girardeau Main	638 MO Cape Girardeau formerly Sikeston	639 MO Cape Girardeau Formerly Poplar Bluff
640 MO Kansas City Vicinity	641 MO* Kansas City Main	642 Not in use	643 Not in use	644 MO Saint Joseph Vicinity	645 MO* Saint Joseph Main	646 MO Chillicothe	647 MO Harrisonville	648 MO Springfield Formerly Joplin	649 MO Kansas City IRS
650 MO Columbia Formerly Jefferson City area	651 MO* Columbia City of Jefferson City	652 MO Columbia Main	653 MO Columbia Formerly Sedalia	654 MO Springfield Formerly Rolla (A-I)	655 MO Springfield Formerly Rolla (J-Z)	656 MO Springfield (A-L)	657 MO Springfield (M-Z)	658 MO* Springfield Main	659 Not in use
660 KS Kansas City West	661 KS* Kansas City Main	662 KS* Shawnee Mission	663 Not in use	664 KS Topeka (A-L)	665 KS Topeka (M-Z)	666 KS* Topeka Main	667 KS Fort Scott	668 KS Topeka Southwest	669 KS Salina North
670 KS Wichita (A-L)	671 KS Wichita (M-Z)	672 KS* Wichita Main	673 KS Independence	674 KS Salina South	675 KS Hutchinson	676 KS Hays	677 KS Colby	678 KS Dodge City	679 KS Liberal
680 NE Omaha West	681 NE* Omaha Main	682 Not in use	683 NE Lincoln (A-L)	684 NE Lincoln (M-Z)	685 NE* Lincoln Main	686 NE Norfolk Formerly Columbus	687 NE Norfolk Main	688 NE Grand Island Main	689 NE Grand Island Formerly Hastings
690 NE McCook	691 NE North Platte	692 NE Valentine	693 NE Alliance	694 Not in use	695 Not in use	696 Not in use	697 Not in use	698 Not in use	699 Not in use

700 LA New Orleans Vicinity	701 LA* New Orleans Main	702 Not in use	703 LA Houma	704 LA Mandeville	705 LA Lafayette	706 LA Lake Charles	707 LA Baton Rouge	708 LA* Baton Rouge	709 Not in use
710 LA Shreveport Vicinity	711 LA* Shreveport Main	712 LA Monroe	713 LA Alexandria East	714 LA Alexandria West	715 Not in use	716 AR Pine Bluff	717 AR Camden	718 AR† Texarkana (TX) Northeast	719 AR Hot Sprs. N.P.
720 AR Little Rock (A-L)	721 AR Little Rock (M-Z)	722 AR* Little Rock Main	723 AR† Memphis (TN) West	724 AR Jonesboro	725 AR Batesville	726 AR Harrison	727 AR Fayetteville	728 AR Russellville	729 AR Fort Smith
730 OK Oklahoma City Vicinity	731 OK* Oklahoma City Main	732 Not in use	733 TX Austin IRS	734 OK Ardmore	735 OK Lawton	736 OK Clinton	737 OK Enid	738 OK Woodward	739 OK† Liberal (KS) South
740 OK Tulsa Vicinity	741 OK* Tulsa Main	742 Not in use	743 OK Tulsa East	744 OK Muskogee	745 OK McAlester	746 OK Ponca City	747 OK Durant	748 OK Shawnee	749 OK Poteau
750 TX North Area	751 TX Dallas Southeast	752 TX* Dallas Main (1)	753 TX* Dallas Main (2)	754 TX Greenville	755 TX Texarkana	756 TX Longview	757 TX Tyler	758 TX Palestine	759 TX Lufkin
760 TX Fort Worth Vicinity	761 TX* Fort Worth Main	762 TX Fort Worth North	763 TX Wichita Falls	764 TX Fort Worth West	765 TX Waco Southwest	766 TX Waco Vicinity	767 TX* Waco Main	768 TX Abilene	769 TX Midland East
770 TX* Houston Main (1)	771 Not in use	772 TX* Houston Main (2)	773 TX North Houston North	774 TX North Houston Southwest	775 TX North Houston Southeast	776 TX Beaumont Vicinity	777 TX* Beaumont Main	778 TX Bryan	779 TX Victoria
780 TX* Laredo Main	781 TX San Antonio East	782 TX* San Antonio Main	783 TX Corpus Christi Vicinity	784 TX* Corpus Christi Main	785 TX McAllen	786 TX* Austin Vicinity	787 TX* Austin Main	788 TX San Antonio Distant West	789 TX Austin Southeast
790 TX Amarillo Vicinity	791 TX* Amarillo Main	792 TX Childress	793 TX Lubbock Vicinity	794 TX* Lubbock Main	795 TX Abilene Vicinity	796 TX* Abilene Main	797 TX Midland West	798 TX El Paso Southeast	799 TX* El Paso Main (1)

ZIP Codes: All States - 3-digit starting with: 0-1 - 2-3 - 4-5 - 6-7 - 8-9