NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Download CSV ↓
Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 410-750 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 ELLICOTTCY MD
— 410-751 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 WESTMINSTR MD
— 410-752 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 BALTIMORE MD
— 410-753 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
— 410-754 1XXX4XXX · 2 holders which blocks → VERIZON MARYLAND, INC. 9212 FEDERALSBG MD
— 410-755 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON MARYLAND, INC. 9212 WARWICK MD
— 410-756 0XXX7XXX8XXX · 3 holders which blocks → VERIZON MARYLAND, INC. 9212 TANEYTOWN MD
— 410-757 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 ANNAPOLIS MD
— 410-758 none assigned yet which blocks → VERIZON MARYLAND, INC. 9212 CENTREVL MD
— 410-759 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
— 410-760 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-761 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-762 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-763 0XXX1XXX2XXX3XXX5XXX · 3 holders which blocks → VERIZON MARYLAND, INC. 9212 EASTON MD
— 410-764 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 BALTIMORE MD
— 410-765 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-766 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-767 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 BALTIMORE MD
— 410-768 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-769 0XXX3XXX which blocks → VERIZON MARYLAND, INC. 9212 TOWSON MD
— 410-770 0XXX1XXX2XXX · 3 holders which blocks → VERIZON MARYLAND, INC. 9212 EASTON MD
— 410-771 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 COCKEYSVL MD
— 410-772 4XXX which blocks → VERIZON MARYLAND, INC. 9212 COLUMBIA MD
— 410-773 0XXX9XXX · 2 holders which blocks → VERIZON MARYLAND, INC. 9212 COCKEYSVL MD
— 410-774 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 CROFTON MD
— 410-775 3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON MARYLAND, INC. 9212 UNION BDG MD
— 410-776 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 BEL AIR MD
— 410-777 0XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 SEVERNA PK MD
— 410-778 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 CHESTERTN MD
— 410-779 4XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
— 410-780 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 ESSEX MD
— 410-781 1XXX2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → VERIZON MARYLAND, INC. 9212 ELLICOTTCY MD
— 410-782 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → VERIZON MARYLAND, INC. 9212 ELKRIDGE MD
— 410-783 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 BALTIMORE MD
— 410-784 0XXX1XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON MARYLAND, INC. 9212 DEALISLAND MD
— 410-785 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 COCKEYSVL MD
— 410-786 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 WOODLAWN MD
— 410-787 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 GLENBURNIE MD
— 410-788 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 CATONSVL MD
— 410-789 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 BRYNPKLNCM MD
— 410-790 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
— 410-791 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 WATERLO236 MD
— 410-792 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 WATERLO236 MD
— 410-793 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON MARYLAND, INC. 9212 SEVERNA PK MD
— 410-794 5XXX6XXX · 2 holders which blocks → LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 COLUMBIA MD
— 410-795 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 SYKESVILLE MD
— 410-796 none assigned yet which blocks → VERIZON MARYLAND, INC. 9212 ELKRIDGE MD
— 410-797 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 WATERLO236 MD
— 410-798 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 WEST RIVER MD
— 410-799 not yet reported which blocks → VERIZON MARYLAND, INC. 9212 WATERLO238 MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.