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
2021-10-01 928-450 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2021-10-01 939-340 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-10-01 949-806 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAPITRNVLY CA
2021-10-01 970-990 0XXX which blocks → SKYE TELECOM LLC DBA SKYETEL 622J SO BIG SPG CO
2021-10-01 986-220 0XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FILER MUTUAL TEL CO 2220 FILER ID
2021-09-30 218-608 0XXX2XXX8XXX · 2 holders which blocks → NUSO, LLC 478J DULUTH MN
2021-09-30 256-940 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F JACKSONVL AL
2021-09-30 334-754 0XXX4XXX5XXX which blocks → ONVOY SPECTRUM, LLC 624H UNIONTOWN AL
2021-09-30 334-930 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MARION AL
2021-09-30 334-940 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H AUBURN AL
2021-09-30 506-565 not yet reported which blocks → TELUS Mobility 8303 Miramichi —
2021-09-30 579-467 not yet reported which blocks → Fibernetics Corporation 464D Mascouche —
2021-09-30 579-468 not yet reported which blocks → Fibernetics Corporation 464D Terrebonne —
2021-09-30 672-975 not yet reported which blocks → TELUS Mobility 8301 Chilliwack —
2021-09-30 727-426 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2021-09-30 774-828 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WORCESTER MA
2021-09-30 782-774 not yet reported which blocks → TELUS Mobility 8303 Halifax —
2021-09-30 873-689 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Norbertville —
2021-09-30 873-690 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Lyster —
2021-09-30 873-691 not yet reported which blocks → IVIC Telecom s.e.n.c 817D Laurierville —
2021-09-30 873-989 not yet reported which blocks → TELUS Mobility 8303 Sherbrooke —
2021-09-30 938-310 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MADISON AL
2021-09-30 938-410 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H RED BAY AL
2021-09-30 938-510 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H RUSSELLVL AL
2021-09-30 945-225 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2021-09-29 218-881 1XXX2XXX3XXX4XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - MN 184D ELY MN
2021-09-29 225-321 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GREENSBURG LA
2021-09-29 225-458 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MONTPELIER LA
2021-09-29 321-367 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MELBOURNE FL
2021-09-29 401-382 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J PROVIDENCE RI
2021-09-29 413-432 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J SPRINGFLD MA
2021-09-29 475-315 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2021-09-29 504-389 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J NEWORLEANS LA
2021-09-29 515-567 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AMES IA
2021-09-29 517-553 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 HOWELL MI
2021-09-29 618-805 1XXX5XXX8XXX · 3 holders which blocks → IP HORIZON LLC 515J CAIRO IL
2021-09-29 629-345 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F SMYRNA TN
2021-09-29 667-755 0–9 XXXall 10 · 4 holders which blocks → QUANTUM TELECOMMUNICATIONS, INC. - MD 2596 PIKESVILLE MD
2021-09-29 672-532 not yet reported which blocks → TELUS 8086 Vancouver —
2021-09-29 707-918 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANTA ROSA CA
2021-09-29 848-893 0–9 XXXall 10 · 3 holders which blocks → CORETEL NEW JERSEY, INC. - NJ 482F NEWBRNSWCK NJ
2021-09-29 872-291 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2021-09-29 872-292 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2021-09-29 915-290 0–9 XXXall 10 · 4 holders which blocks → AT&T - LOCAL 7421 VINTON TX
2021-09-29 925-834 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ANTIOCH CA
2021-09-29 945-224 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 MCKINNEY TX
2021-09-29 970-806 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H JOHNSTMLKN CO
2021-09-29 984-944 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J DURHAM NC
2021-09-28 240-853 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F LAUREL236 MD
2021-09-28 253-374 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA

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.