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 717
VERIZON NORTH, INC. - PA 55
VERIZON NORTH, INC. - PA (CONTEL) 5
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2016-05-10 717-356 0–9 XXXall 10 · 5 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-225 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 SPRING GRV PA
— 717-227 6XXX7XXX · 2 holders which blocks → VERIZON NORTH, INC. - PA 0169 GLEN ROCK PA
— 717-229 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA 0169 JEFFERSON PA
— 717-235 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 GLEN ROCK PA
— 717-244 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 RED LION PA
— 717-246 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 RED LION PA
— 717-252 6XXX7XXX8XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA 0169 WRIGHTSVL PA
— 717-259 2XXX3XXX4XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA 0169 EASTBERLIN PA
— 717-266 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 MANCHESTER PA
— 717-268 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NORTH, INC. - PA 0169 MANCHESTER PA
— 717-292 8XXX which blocks → VERIZON NORTH, INC. - PA 0169 DOVER PA
— 717-308 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → VERIZON NORTH, INC. - PA 0169 DOVER PA
— 717-312 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 HERSHEY PA
— 717-382 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NORTH, INC. - PA 0169 FAWN GROVE PA
— 717-417 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NORTH, INC. - PA 0169 RED LION PA
— 717-428 5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA 0169 LOGANVILLE PA
— 717-432 6XXX which blocks → VERIZON NORTH, INC. - PA 0169 DILLSBURG PA
— 717-456 0XXX1XXX8XXX9XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA 0169 DELTA PA
— 717-469 4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NORTH, INC. - PA 0169 SHELLSVL PA
— 717-502 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NORTH, INC. - PA 0169 DILLSBURG PA
— 717-520 6XXX which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 HERSHEY PA
— 717-531 not yet reported which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 HERSHEY PA
— 717-533 not yet reported which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 HERSHEY PA
— 717-534 not yet reported which blocks → VERIZON NORTH, INC. - PA (CONTEL) 0170 HERSHEY PA
— 717-600 3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-699 7XXX8XXX9XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-741 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-747 1XXX3XXX4XXX6XXX · 2 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-751 8XXX which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-755 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-757 8XXX which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-764 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-767 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-771 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-779 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-781 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-792 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-793 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-812 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-815 0XXX5XXX · 2 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-840 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-841 0XXX2XXX4XXX5XXX6XXX · 4 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-843 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-845 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-846 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-848 0XXX which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-849 not yet reported which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-851 8XXX which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
— 717-852 5XXX which blocks → VERIZON NORTH, INC. - PA 0169 YORK 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.