NRNumberResearch Membership · Data 09/17/2026

← Area code 301

All assignees

800 prefixes in 301 · initial assignments from the NANPA CO code file, 09/17/2026

Prefixes held by all assignees in area code 301
NPA-NXXRate centerOCNAssignedPooled
301-600 FREDERICK 9212 2006-07-06 Yes
301-601 WSNGTNZN10 9212 — —
301-602 WSHNGTNZN3 6395 — —
301-603 WSNGTNZN11 9212 — Yes
301-604 LAUREL236 9212 — —
301-605 WSNGTNZN10 9212 — Yes
301-606 FREDERICK 6395 — —
301-607 DAMASCS240 9212 — Yes
301-608 WSHNGTNZN3 9212 — —
301-609 WALDORF 9212 — Yes
301-610 WSNGTNZN10 9212 — Yes
301-611 XXXXXXXXXX MULT — —
301-612 WSNG238Z14 7325 2012-10-11 Yes
301-613 WSHNGTNZN3 6855 — Yes
301-614 WSNG236Z13 9212 — —
301-615 WSNG236Z13 071F — —
301-616 OAKLAND 4720 — Yes
301-617 LAUREL236 9212 — —
301-618 WSHNGTNZN4 9212 — Yes
301-619 FREDERICK 9212 — —
301-620 FREDERICK 9212 — —
301-621 WSNG238Z14 9212 — —
301-622 WSHNGTNZN3 9212 — —
301-623 WSNG236Z13 7529 — Yes
301-624 FREDERICK 9212 — Yes
301-625 WSHNGTNZN3 9212 — —
301-626 WSHNGTNZN3 9212 — —
301-627 WSNG236Z15 9212 — —
301-628 WSHNGTNZN3 7529 — Yes
301-629 WSNG238Z14 9212 — Yes
301-630 WSHNGTNZN6 9212 — —
301-631 FREDERICK 9212 — Yes
301-632 WALDORF 9212 — Yes
301-633 WSHNGTNZN2 4036 — —
301-634 WSHNGTNZN2 7529 — —
301-635 WSHNGTNZN5 071F 2022-07-27 Yes
301-636 WSHNGTNZN5 9212 — Yes
301-637 WSNGTNZN10 6119 — Yes
301-638 WALDORF 9212 — Yes
301-639 FREDERICK 6395 — —
301-640 WSNGTNZN10 9212 — Yes
301-641 WSHNGTNZN3 6395 — —
301-642 WSHNGTNZN2 4036 — —
301-643 WALDORF 6395 — —
301-644 FREDERICK 9212 — Yes
301-645 WALDORF 9212 — —
301-646 WSHNGTNZN2 4036 — —
301-647 WSNG236Z13 9748 — —
301-648 WSHNGTNZN2 4036 — —
301-649 WSNGTNZN11 9212 — —
301-650 WSHNGTNZN3 9212 — —
301-651 WSHNGTNZN3 6395 — —
301-652 WSHNGTNZN2 9212 — —
301-653 WALDORF 4036 — —
301-654 WSHNGTNZN2 9212 — —
301-655 WSHNGTNZN2 4036 — —
301-656 WSHNGTNZN2 9212 — —
301-657 WSHNGTNZN2 9212 — —
301-658 ASHTON236 7529 — Yes
301-659 WALDORF 4036 — Yes
301-660 KEEDYSVL 4036 2004-03-19 Yes
301-661 WSHNGTNZN2 4036 — —
301-662 FREDERICK 9212 — —
301-663 FREDERICK 9212 — —
301-664 WSHNGTNZN2 9212 — Yes
301-665 HAGERSTOWN 9212 — Yes
301-666 WSNG236Z14 7529 — Yes
301-667 MYERSVILLE 4036 — —
301-668 FREDERICK 9212 — —
301-669 WSHNGTNZN5 9212 — —
301-670 WSNGTNZN10 9212 — —
301-671 HAGERSTOWN 071F — —
301-672 LXTNPKGRML 6855 — Yes
301-673 FREDERICK 4036 — Yes
301-674 WSHNGTNZN2 6855 — Yes
301-675 WSHNGTNZN3 6855 — —
301-676 FREDERICK 4036 — —
301-677 WSNG236Z14 7529 — —
301-678 HANCOCK 9212 — Yes
301-679 WSNGTNZN12 7529 — Yes
301-680 WSHNGTNZN3 9212 — —
301-681 WSHNGTNZN3 9212 — —
301-682 FREDERICK 9212 — Yes
301-683 WSHNGTNZN4 7529 — Yes
301-684 INDIANHEAD 7529 — Yes
301-685 DAMASCS236 7529 — Yes
301-686 WSHNGTNZN6 9212 — Yes
301-687 FROSTBURG 9212 — Yes
301-688 WSNG236Z13 9212 — —
301-689 FROSTBURG 9212 — Yes
301-690 LEONARDTN 228C 2007-05-23 Yes
301-691 POOLESVL 7529 — Yes
301-692 WSNGTNZN11 7529 — Yes
301-693 FREDERICK 6855 — —
301-694 FREDERICK 9212 — —
301-695 FREDERICK 9212 — —
301-696 FREDERICK 9212 — —
301-697 CUMBERLAND 4036 — —
301-698 FREDERICK 9212 — —
301-699 WSHNGTNZN4 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.