NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-02-07 835-215 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J ALLENTOWN PA
2023-02-06 447-217 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DANVILLE IL
2023-02-06 447-242 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ELKHART IL
2023-02-06 579-933 not yet reported which blocks → Fibernetics Corporation 464D Joliette —
2023-02-06 672-374 not yet reported which blocks → Bell Mobility 6574 Abbotsford —
2023-02-06 682-416 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2023-02-06 742-212 not yet reported which blocks → Bell Mobility 6574 St. Catharines-Thorold —
2023-02-06 742-614 not yet reported which blocks → Bell Mobility 6574 Brampton —
2023-02-06 913-420 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2023-02-06 920-761 1XXX2XXX which blocks → NUSO, LLC 732J CLYMAN WI
2023-02-06 920-780 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J NEENAH WI
2023-02-03 218-614 0XXX1XXX2XXX8XXX · 3 holders which blocks → WIKSTROM TELEPHONE COMPANY, INC. - MN 914F HUMBOLDT MN
2023-02-03 229-542 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CUTHBERT GA
2023-02-03 229-570 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FITZGERALD GA
2023-02-03 239-441 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J FORT MYERS FL
2023-02-03 308-208 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NO PLATTE NE
2023-02-03 315-607 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J SYRACUSE NY
2023-02-03 385-516 1XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2023-02-03 448-217 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J PANAMACITY FL
2023-02-03 448-219 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J PENSACOLA FL
2023-02-03 448-220 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J TALLAHASSE FL
2023-02-03 479-492 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 GREENWOOD AR
2023-02-03 582-232 0XXX1XXX6XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 WATERFORD PA
2023-02-03 763-288 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2023-02-03 825-481 not yet reported which blocks → Shaw Telecom Inc. 497E Edmonton —
2023-02-03 825-547 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2023-02-03 828-512 0XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TRYON NC
2023-02-03 839-233 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BARNWELL SC
2023-02-03 864-600 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENWOOD SC
2023-02-03 904-898 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J JACKSONVL FL
2023-02-03 949-761 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CAPITRNVLY CA
2023-02-02 213-636 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 10 CA
2023-02-02 220-245 0XXX1XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WALNUT OH
2023-02-02 269-400 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J KALAMAZOO MI
2023-02-02 368-202 not yet reported which blocks → Bell Mobility 6574 Calgary —
2023-02-02 438-236 not yet reported which blocks → Fibernetics Corporation 464D Montreal —
2023-02-02 458-297 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HALFWAY OR
2023-02-02 579-505 not yet reported which blocks → Fibernetics Corporation 464D Laval-Est —
2023-02-02 579-506 not yet reported which blocks → Fibernetics Corporation 464D Laval-Ouest —
2023-02-02 657-659 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-02-02 657-661 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-02-02 657-662 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2023-02-02 657-664 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2023-02-02 930-274 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKEMONROE IN
2023-02-02 941-332 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E SARASOTA FL
2023-02-01 218-588 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 MARBLE MN
2023-02-01 252-298 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J GREENVILLE NC
2023-02-01 260-326 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 732J NEW HAVEN IN
2023-02-01 308-206 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KEARNEY NE
2023-02-01 352-768 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WILDWOOD FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.