All assignees
800 prefixes in 410 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 410-700 | — | — | ||
| 410-701 | RANDALLSTN | 7228 | — | Yes |
| 410-702 | REISTERSTN | 7228 | — | Yes |
| 410-703 | ANNAPOLIS | 6395 | — | — |
| 410-704 | TOWSON | 7228 | — | — |
| 410-705 | WATERLO236 | 071F | — | Yes |
| 410-706 | BALTIMORE | 9212 | — | — |
| 410-707 | COLUMBIA | 6395 | — | — |
| 410-708 | CHESTERTN | 6395 | — | — |
| 410-709 | SPARROWSPT | 7228 | — | Yes |
| 410-710 | BALTIMORE | 6855 | 2005-10-03 | Yes |
| 410-711 | XXXXXXXXXX | MULT | — | — |
| 410-712 | ELKRIDGE | 9212 | — | — |
| 410-713 | SALISBURY | 6119 | — | Yes |
| 410-714 | EASTON | 4036 | — | Yes |
| 410-715 | COLUMBIA | 9212 | — | — |
| 410-716 | TOWSON | 9212 | — | Yes |
| 410-717 | ELKRIDGE | 7591 | — | Yes |
| 410-718 | CATONSVL | 4036 | — | Yes |
| 410-719 | CATONSVL | 9212 | — | — |
| 410-720 | ELLICOTTCY | 9212 | — | Yes |
| 410-721 | CROFTON | 9212 | — | — |
| 410-722 | WATERLO236 | 9212 | — | — |
| 410-723 | OCEAN CITY | 9212 | — | — |
| 410-724 | WATERLO236 | 9212 | — | Yes |
| 410-725 | EASTON | 6855 | — | Yes |
| 410-726 | SALISBURY | 6395 | — | — |
| 410-727 | BALTIMORE | 9212 | — | — |
| 410-728 | BALTIMORE | 9212 | — | — |
| 410-729 | SEVERN | 9212 | — | Yes |
| 410-730 | COLUMBIA | 9212 | — | — |
| 410-731 | ANNAPOLIS | 6630 | — | — |
| 410-732 | BALTIMORE | 9212 | — | — |
| 410-733 | CATONSVL | 4036 | — | — |
| 410-734 | CHURCHVL | 9212 | — | Yes |
| 410-735 | BALTIMORE | 829J | — | Yes |
| 410-736 | BALTIMORE | 9212 | — | Yes |
| 410-737 | ARBUTUS | 9212 | — | — |
| 410-738 | WATERLO236 | 9212 | — | — |
| 410-739 | CENTREVL | 4036 | — | Yes |
| 410-740 | COLUMBIA | 9212 | — | — |
| 410-741 | WEST RIVER | 9212 | — | Yes |
| 410-742 | SALISBURY | 9212 | — | — |
| 410-743 | BALTIMORE | 6630 | — | — |
| 410-744 | CATONSVL | 9212 | — | — |
| 410-745 | STMICHAELS | 9212 | — | Yes |
| 410-746 | BALTIMORE | 6395 | — | — |
| 410-747 | CATONSVL | 9212 | — | — |
| 410-748 | ELLICOTTCY | 6630 | — | — |
| 410-749 | SALISBURY | 9212 | — | — |
| 410-750 | ELLICOTTCY | 9212 | — | — |
| 410-751 | WESTMINSTR | 9212 | — | — |
| 410-752 | BALTIMORE | 9212 | — | — |
| 410-753 | PIKESVILLE | 7228 | — | Yes |
| 410-754 | FEDERALSBG | 9212 | — | Yes |
| 410-755 | WARWICK | 9212 | — | Yes |
| 410-756 | TANEYTOWN | 9212 | — | Yes |
| 410-757 | ANNAPOLIS | 9212 | — | — |
| 410-758 | CENTREVL | 9212 | — | Yes |
| 410-759 | BALTIMORE | 4036 | — | Yes |
| 410-760 | GLENBURNIE | 9212 | — | — |
| 410-761 | GLENBURNIE | 9212 | — | — |
| 410-762 | GLENBURNIE | 9212 | — | Yes |
| 410-763 | EASTON | 9212 | — | Yes |
| 410-764 | BALTIMORE | 9212 | — | — |
| 410-765 | GLENBURNIE | 9212 | — | — |
| 410-766 | GLENBURNIE | 9212 | — | — |
| 410-767 | BALTIMORE | 9212 | — | — |
| 410-768 | GLENBURNIE | 9212 | — | — |
| 410-769 | TOWSON | 9212 | — | Yes |
| 410-770 | EASTON | 9212 | — | Yes |
| 410-771 | COCKEYSVL | 9212 | — | — |
| 410-772 | COLUMBIA | 9212 | — | Yes |
| 410-773 | COCKEYSVL | 9212 | — | Yes |
| 410-774 | CROFTON | 7228 | — | Yes |
| 410-775 | UNION BDG | 9212 | — | Yes |
| 410-776 | BEL AIR | 7325 | — | Yes |
| 410-777 | SEVERNA PK | 7228 | — | Yes |
| 410-778 | CHESTERTN | 9212 | — | — |
| 410-779 | BALTIMORE | 6119 | — | Yes |
| 410-780 | ESSEX | 9212 | — | — |
| 410-781 | ELLICOTTCY | 9212 | — | Yes |
| 410-782 | ELKRIDGE | 9212 | — | Yes |
| 410-783 | BALTIMORE | 9212 | — | — |
| 410-784 | DEALISLAND | 9212 | — | Yes |
| 410-785 | COCKEYSVL | 9212 | — | — |
| 410-786 | WOODLAWN | 7228 | — | — |
| 410-787 | GLENBURNIE | 9212 | — | — |
| 410-788 | CATONSVL | 9212 | — | — |
| 410-789 | BRYNPKLNCM | 9212 | — | — |
| 410-790 | TOWSON | 4036 | — | — |
| 410-791 | WATERLO236 | 9212 | — | — |
| 410-792 | WATERLO236 | 9212 | — | — |
| 410-793 | SEVERNA PK | 9212 | — | Yes |
| 410-794 | COLUMBIA | 7591 | — | Yes |
| 410-795 | SYKESVILLE | 9212 | — | — |
| 410-796 | ELKRIDGE | 9212 | — | Yes |
| 410-797 | WATERLO236 | 9212 | — | — |
| 410-798 | WEST RIVER | 9212 | — | — |
| 410-799 | WATERLO238 | 9212 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.