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 518
VERIZON NEW YORK, INC. 225
PAETEC ITEL, LLC 59
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 58
NEW CINGULAR WIRELESS PCS, LLC - DC 45
TC SYSTEMS, INC. - NY 35
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
— 518-355 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-356 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-357 3XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-358 0XXX1XXX5XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 FTCOVINGTN NY
— 518-359 0XXX1XXX5XXX6XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 TUPPERLAKE NY
— 518-360 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-361 5XXX8XXX9XXX which blocks → METROPCS, INC. 5562 GLENSFALLS NY
— 518-362 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 COLONIE NY
— 518-363 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 BALLSTNSPA NY
— 518-364 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ALBANY NY
— 518-365 none assigned yet which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-366 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-367 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-368 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY
— 518-369 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-370 6XXX which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-371 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-372 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-373 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-374 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-376 none assigned yet which blocks → METROPCS, INC. 5562 ALBANY NY
— 518-377 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-381 0XXX which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-382 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-383 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-384 4XXX5XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-386 8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-387 3XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-388 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-389 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 COLONIE NY
— 518-391 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-392 not yet reported which blocks → TACONIC TEL. CORP. 0084 CHATHAM NY
— 518-393 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-394 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J AMSTERDAM NY
— 518-395 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-396 0XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-397 not yet reported which blocks → TACONIC TEL. CORP. 0084 CHATHAM NY
— 518-398 4XXX which blocks → TACONIC TEL. CORP. 0084 PINEPLAINS NY
— 518-399 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-402 not yet reported which blocks → PAETEC ITEL, LLC 829J ALBANY NY
— 518-404 not yet reported which blocks → CONTACT COMMUNICATIONS, INC. 4721 MALONE NY
— 518-406 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 JONESVILLE NY
— 518-408 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-409 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 GLENSFALLS NY
— 518-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 518-412 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 ELIZABTHTN NY
— 518-416 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
— 518-418 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 LAKEPLACID NY
— 518-420 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 PLATTSBG NY
— 518-421 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALBANY NY

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.