NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

7 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 479
NEW CINGULAR WIRELESS PCS, LLC - IL 3
ONVOY, LLC - AR 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 2
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
— 479-273 not yet reported which blocks → SOUTHWESTERN BELL 9533 BENTONVL AR
— 479-277 not yet reported which blocks → SOUTHWESTERN BELL 9533 BENTONVL AR
— 479-283 none assigned yet which blocks → T-MOBILE USA, INC. 6529 FAYETTEVL AR
— 479-284 1XXX which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 HECTOR AR
— 479-285 none assigned yet which blocks → T-MOBILE USA, INC. 6529 FORT SMITH AR
— 479-288 not yet reported which blocks → SOUTHWESTERN BELL 9533 FORT SMITH AR
— 479-290 not yet reported which blocks → SOUTHWESTERN BELL 9533 SPRINGDALE AR
— 479-291 7XXX which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 MAYSVILLE AR
— 479-292 6XXX which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 SALUS AR
— 479-293 7XXX which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 LONDON AR
— 479-294 2XXX3XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WEST FORK AR
— 479-296 none assigned yet which blocks → COMCAST IP PHONE, LLC 318J ELKINS AR
— 479-297 1XXX2XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MULBERRY AR
— 479-298 6XXX which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 SULPHURSPG AR
— 479-299 not yet reported which blocks → ARKWEST COMMUNICATIONS, INC. 1734 BLUFFTON AR
— 479-300 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FARMINGTON AR
— 479-306 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 SPRINGDALE AR
— 479-309 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MIDLAND AR
— 479-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 479-326 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BENTONVL AR
— 479-331 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 DOVER AR
— 479-344 2XXX3XXX4XXX6XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J GRAVETTE AR
— 479-345 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F NATURALDAM AR
— 479-347 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SPRINGDALE AR
— 479-353 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 FORT SMITH AR
— 479-356 not yet reported which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 RUSSELLVL AR
— 479-357 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 GREENWOOD AR
— 479-359 8XXX which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 GARFIELD AR
— 479-361 0XXX3XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 SPRINGDALE AR
— 479-363 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 EUREKA SPG AR
— 479-366 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR
— 479-369 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 MOUNTAINBG AR
— 479-373 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SILOAM SPG AR
— 479-382 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 FORT SMITH AR
— 479-387 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX which blocks → AT&T - LOCAL 7421 FAYETTEVL AR
— 479-393 8XXX which blocks → ARKWEST COMMUNICATIONS, INC. 1734 DANVILLE AR
— 479-394 9XXX which blocks → SOUTHWESTERN BELL 9533 MENA AR
— 479-395 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
— 479-400 0XXX1XXX2XXX4XXX6XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PRAIRIEGRV AR
— 479-404 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J FAYETTEVL AR
— 479-409 0XXX1XXX2XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAYETTEVL AR
— 479-410 0XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 VAN BUREN AR
— 479-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 479-414 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
— 479-417 not yet reported which blocks → AR
— 479-418 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 BENTONVL AR
— 479-419 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 SPRINGDALE AR
— 479-420 2XXX which blocks → T-MOBILE USA, INC. 6529 FORT SMITH AR
— 479-422 3XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAYETTEVL AR
— 479-424 7XXX which blocks → WINDSTREAM COMMUNICATIONS, INC. - AR 7656 FORT SMITH AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.