NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
8X8, INC. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 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
— 712-213 not yet reported which blocks → LONG LINES METRO, INC. - IA 828B STORM LAKE IA
— 712-221 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CHEROKEE IA
— 712-223 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
— 712-224 not yet reported which blocks → IMON COMMUNICATIONS LLC 7021 SIOUX CITY IA
— 712-225 7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 CHEROKEE IA
— 712-226 not yet reported which blocks → IMON COMMUNICATIONS LLC 7021 SIOUX CITY IA
— 712-227 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CRESCENT IA
— 712-229 4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CHEROKEE IA
— 712-230 2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOSPERS IA
— 712-231 0XXX3XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOSPERS IA
— 712-233 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-234 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-237 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
— 712-239 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-240 1XXX5XXX6XXX7XXX8XXX9XXX which blocks → UNITED STATES CELLULAR - IA 6266 SPENCER IA
— 712-241 not yet reported which blocks → IA
— 712-242 5XXX6XXX7XXX8XXX which blocks → WINDSTREAM COMMUNICATIONS OF THE MIDEWEST INC - NE 7816 COUNCILBLF IA
— 712-243 0XXX which blocks → QWEST CORPORATION 9631 ATLANTIC IA
— 712-244 not yet reported which blocks → LONG LINES METRO, INC. - IA 828B SIOUX CITY IA
— 712-246 8XXX9XXX which blocks → QWEST CORPORATION 9631 SHENANDOAH IA
— 712-249 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ATLANTIC IA
— 712-250 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - IA 6266 ATLANTIC IA
— 712-251 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIOUX CITY IA
— 712-252 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-253 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIOUX CITY IA
— 712-254 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - IA 6266 ATLANTIC IA
— 712-255 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-256 7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J COUNCILBLF IA
— 712-257 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
— 712-258 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-259 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
— 712-260 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SPENCER IA
— 712-261 6XXX7XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - IA 6266 CHEROKEE IA
— 712-262 not yet reported which blocks → QWEST CORPORATION 9631 SPENCER IA
— 712-263 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 DENISON IA
— 712-264 2XXX5XXX which blocks → QWEST CORPORATION 9631 SPENCER IA
— 712-265 9XXX which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 DENISON IA
— 712-266 3XXX4XXX5XXX6XXX · 3 holders which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-267 1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DENISON IA
— 712-268 0XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 EXIRA IA
— 712-269 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DENISON IA
— 712-270 1XXX which blocks → UNITED STATES CELLULAR - IA 6266 SPENCER IA
— 712-271 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SERGENTBLF IA
— 712-272 2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 NEWELL IA
— 712-273 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 EARLY IA
— 712-274 3XXX which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-275 not yet reported which blocks → SCHALLER TEL. CO. 1291 SCHALLER IA
— 712-276 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-277 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-278 6XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 IRETON IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.