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 918
OKLAHOMA WINDSTREAM, INC. 15
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
2003-02-21 918-385 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
— 918-410 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OKLAHOMA WINDSTREAM, INC. 2011 STILWELL OK
— 918-564 0–9 XXXall 10 · 6 holders which blocks → OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
— 918-635 4XXX which blocks → OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
— 918-647 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
— 918-649 9XXX which blocks → OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
— 918-653 not yet reported which blocks → OKLAHOMA WINDSTREAM, INC. 2011 HEAVENER OK
— 918-654 not yet reported which blocks → OKLAHOMA WINDSTREAM, INC. 2011 CAMERON OK
— 918-655 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 WISTER OK
— 918-658 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 MONROEHOWE OK
— 918-696 not yet reported which blocks → OKLAHOMA WINDSTREAM, INC. 2011 STILWELL OK
— 918-705 2XXX7XXX8XXX · 3 holders which blocks → OKLAHOMA WINDSTREAM, INC. 2011 VIAN OK
— 918-773 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 VIAN OK
— 918-778 not yet reported which blocks → OKLAHOMA WINDSTREAM, INC. 2011 BARON OK
— 918-797 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 STILWELL OK

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.