NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 484-996 1XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - PA 547E PHOENIXVL PA
— 484-997 0XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CENTER PT PA
— 484-998 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → HD CARRIER LLC 321J CENTER PT PA
— 501-202 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-206 1XXX2XXX4XXX which blocks → SOUTHWESTERN BELL 9533 HEBER SPG AR
— 501-207 0XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 SEARCY AR
— 501-208 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MORRILTON AR
— 501-210 5XXX8XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 501-212 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-217 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-218 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-219 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-220 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-221 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-222 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 WRIGHTSVL AR
— 501-223 7XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-224 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-225 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-226 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K JESSIEVL AR
— 501-227 2XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-228 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-230 7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SEARCY AR
— 501-231 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-233 not yet reported which blocks → ARKWEST COMMUNICATIONS, INC. 1734 CASA AR
— 501-235 0XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T - LOCAL 7421 LITTLEROCK AR
— 501-240 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LITTLEROCK AR
— 501-241 4XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JACKSONVL AR
— 501-244 3XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-245 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 LITTLEROCK AR
— 501-247 none assigned yet which blocks → METROPCS, INC. 5562 LITTLEROCK AR
— 501-249 4XXX5XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
— 501-250 1XXX2XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 HEBER SPG AR
— 501-252 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
— 501-255 4XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
— 501-256 0XXX8XXX which blocks → T-MOBILE USA, INC. 6529 LITTLEROCK AR
— 501-257 0XXX7XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-258 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
— 501-259 4XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
— 501-260 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LITTLEROCK AR
— 501-261 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 SPRINGLAKE AR
— 501-262 7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 HOTSPRINGS AR
— 501-265 9XXX which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR
— 501-268 not yet reported which blocks → SOUTHWESTERN BELL 9533 SEARCY AR
— 501-269 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONWAY AR
— 501-275 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 COY AR
— 501-276 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
— 501-278 4XXX which blocks → SOUTHWESTERN BELL 9533 SEARCY AR
— 501-279 not yet reported which blocks → SOUTHWESTERN BELL 9533 SEARCY AR
— 501-280 not yet reported which blocks → SOUTHWESTERN BELL 9533 LITTLEROCK AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.