NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 712-204 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SIOUX CITY IA
— 712-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.