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
— 479-959 not yet reported which blocks → LITTLEROCK AR
— 479-963 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 PARIS AR
— 479-964 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 RUSSELLVL AR
— 479-965 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 CHARLESTON AR
— 479-967 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 RUSSELLVL AR
— 479-968 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 RUSSELLVL AR
— 479-969 not yet reported which blocks → MAGAZINE TEL. CO. 1710 MAGAZINE AR
— 479-970 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RUSSELLVL AR
— 479-973 3XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FAYETTEVL AR
— 479-976 not yet reported which blocks → AR
— 479-979 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 CLARKSVL AR
— 479-981 4XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EUREKA SPG AR
— 479-986 not yet reported which blocks → SOUTHWESTERN BELL 9533 ROGERS AR
— 479-988 not yet reported which blocks → AR
— 479-996 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 GREENWOOD AR
— 479-997 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 MULBERRY AR
— 480-206 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
— 480-209 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
— 480-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AZ
— 480-212 2XXX3XXX6XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
— 480-215 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
— 480-218 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-219 not yet reported which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
— 480-221 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
— 480-222 not yet reported which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7175 PHOENIX AZ
— 480-223 2XXX3XXX7XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
— 480-225 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
— 480-227 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
— 480-230 not yet reported which blocks → AZ
— 480-236 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
— 480-237 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
— 480-248 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
— 480-250 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
— 480-251 none assigned yet which blocks → METROPCS, INC. 5562 PHOENIX AZ
— 480-260 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AZ
— 480-264 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
— 480-279 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-281 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
— 480-282 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
— 480-283 3XXX4XXX5XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-288 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-293 4XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
— 480-296 1XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
— 480-301 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-303 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-308 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
— 480-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AZ
— 480-312 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-314 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ
— 480-315 not yet reported which blocks → QWEST CORPORATION 9636 PHOENIX AZ

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.