NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 570
VERIZON PENNSYLVANIA, INC. 156
COMMONWEALTH TELEPHONE COMPANY LLC 75
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 75
NEW CINGULAR WIRELESS PCS, LLC - DC 68
CORE COMMUNICATIONS, INC. - PA 62
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 570-628 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 POTTSVILLE PA
— 570-629 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 STROUDSBG PA
— 570-631 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 DALLAS PA
— 570-634 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 BROOKSIDE PA
— 570-635 not yet reported which blocks → HANCOCK TEL. CO. 0099 WINTERDALE PA
— 570-636 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 FREELAND PA
— 570-638 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 BLOSSBURG PA
— 570-639 6XXX which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 HARVEYS LK PA
— 570-640 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POTTSVILLE PA
— 570-641 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 POTTSVILLE PA
— 570-642 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLEASANTMT PA
— 570-643 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 POCONOLAKE PA
— 570-644 8XXX9XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 SHAMOKIN PA
— 570-645 not yet reported which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 LANSFORD PA
— 570-646 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 POCONOLAKE PA
— 570-647 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HONESDALE PA
— 570-648 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 SHAMOKIN PA
— 570-649 1XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 TURBOTVL PA
— 570-650 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSTON PA
— 570-651 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WILLIAMSPT PA
— 570-654 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PITTSTON PA
— 570-655 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 PITTSTON PA
— 570-658 0XXX1XXX5XXX8XXX9XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 BEAVER SPG PA
— 570-659 1XXX2XXX6XXX7XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 COVINGTON PA
— 570-660 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 LOCK HAVEN PA
— 570-662 5XXX which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 MANSFIELD PA
— 570-663 1XXX5XXX6XXX7XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 QUAKERLAKE PA
— 570-668 not yet reported which blocks → VERIZON PENNSYLVANIA, INC. 9208 TAMAQUA PA
— 570-669 1XXX3XXX7XXX8XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 NESQUHONNG PA
— 570-670 not yet reported which blocks → SPOK, INC. 6630 SCRANTON PA
— 570-672 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 ELYSBURG PA
— 570-673 0XXX1XXX2XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF CANTON, LLC 0152 CANTON PA
— 570-674 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 DALLAS PA
— 570-675 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 DALLAS PA
— 570-676 1XXX2XXX6XXX7XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 NEWFOUNDLD PA
— 570-677 7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 SCRANTON PA
— 570-678 1XXX2XXX4XXX6XXX8XXX · 5 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 NUANGOLA PA
— 570-679 not yet reported which blocks → NORTH EASTERN PENNSYLVANIA TEL. CO. 0191 UNION DALE PA
— 570-682 5XXX6XXX7XXX · 2 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 VALLEYVIEW PA
— 570-683 1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 ORANGEVL PA
— 570-685 not yet reported which blocks → LACKAWAXEN TELECOMMUNICATIONS SERVICES, INC. 0177 ROWLAND PA
— 570-686 0XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA (QUAKER ST) 0201 MILFORD PA
— 570-688 none assigned yet which blocks → VERIZON PENNSYLVANIA, INC. 9208 STROUDSBG PA
— 570-689 1XXX6XXX8XXX · 2 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 HAMLIN PA
— 570-690 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 TRUCKSVL PA
— 570-693 6XXX7XXX9XXX · 3 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 WYOMING PA
— 570-694 6XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WYOMING PA
— 570-695 1XXX5XXX6XXX7XXX · 3 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 TREMONT PA
— 570-696 not yet reported which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 TRUCKSVL PA
— 570-697 0XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WYOMING PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.