NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-01-10 272-676 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWMILFORD PA
2022-01-10 272-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SHAMOKIN PA
2022-01-10 313-200 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-01-10 341-209 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2022-01-10 341-213 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2022-01-10 341-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELSBR-PINL CA
2022-01-10 343-681 not yet reported which blocks → Fibernetics Corporation 464D St. Eugene —
2022-01-10 343-682 not yet reported which blocks → Fibernetics Corporation 464D St. Isidore —
2022-01-10 343-683 not yet reported which blocks → Fibernetics Corporation 464D St-Regis —
2022-01-10 343-684 not yet reported which blocks → Fibernetics Corporation 464D Williamsburg —
2022-01-10 346-639 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HSTNSUBURB TX
2022-01-10 424-464 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MALIBU CA
2022-01-10 424-768 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CMTN CMTN CA
2022-01-10 425-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ISSAQUAH WA
2022-01-10 442-646 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRAWLEY CA
2022-01-10 474-750 not yet reported which blocks → Bell Mobility 6574 Regina —
2022-01-10 475-673 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORWALK CT
2022-01-10 475-832 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WILTON CT
2022-01-10 502-431 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ZONETON KY
2022-01-10 531-893 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LINCOLN NE
2022-01-10 562-784 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ALAMITOS CA
2022-01-10 562-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DOWNEY CA
2022-01-10 571-543 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2022-01-10 575-832 0XXX1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TUCUMCARI NM
2022-01-10 582-422 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CRESSON PA
2022-01-10 582-433 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRADFORD PA
2022-01-10 582-436 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOMERSET PA
2022-01-10 605-746 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J PLATTE SD
2022-01-10 628-278 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2022-01-10 650-519 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2022-01-10 650-541 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2022-01-10 650-547 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WOODSIDE CA
2022-01-10 657-540 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2022-01-10 657-543 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ANA CA
2022-01-10 657-546 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-01-10 657-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BUENA PARK CA
2022-01-10 660-270 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLINTON MO
2022-01-10 669-308 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2022-01-10 669-437 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORGANHILL CA
2022-01-10 682-371 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2022-01-10 689-268 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WINTERGRDN FL
2022-01-10 719-408 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LIMON CO
2022-01-10 719-409 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F CALHAN CO
2022-01-10 720-654 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2022-01-10 743-221 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E MULBERRY NC
2022-01-10 747-327 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C VAN NUYS CA
2022-01-10 747-466 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NO HOLLYWD CA
2022-01-10 747-746 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RESEDA CA
2022-01-10 747-836 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORTHRIDGE CA
2022-01-10 771-200 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.