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
2022-01-13 870-848 0XXX3XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOPE AR
2022-01-13 912-742 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J POOLER GA
2022-01-13 917-619 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN06 NY
2022-01-13 917-998 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN01 NY
2022-01-13 928-878 0XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GILA BEND AZ
2022-01-13 929-675 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NWYRCYZN06 NY
2022-01-13 929-694 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN07 NY
2022-01-13 930-866 2XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HENRYVILLE IN
2022-01-13 936-837 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J COLDSPRING TX
2022-01-13 940-837 3XXX4XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FORESTBURG TX
2022-01-13 952-866 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORWOOD MN
2022-01-13 959-466 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WASHINGTON CT
2022-01-13 959-675 3XXX5XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORFOLK CT
2022-01-13 959-866 0XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CANTON CT
2022-01-13 959-966 0XXX4XXX5XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKEVILLE CT
2022-01-13 970-937 0XXX1XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DE BEQUE CO
2022-01-13 979-866 2XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHURCHILL TX
2022-01-13 980-934 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WADESBORO NC
2022-01-13 984-826 0XXX1XXX2XXX4XXX5XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANTHAM NC
2022-01-13 985-866 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTHOSYKA LA
2022-01-13 986-242 0XXX1XXX2XXX4XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ABERDEEN ID
2022-01-13 986-326 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J KILGORE ID
2022-01-13 986-342 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J HOLLISTER ID
2022-01-13 986-426 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ISLANDPARK ID
2022-01-13 986-546 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J HOLBROOK ID
2022-01-13 986-636 1XXX3XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KOOSKIA ID
2022-01-13 986-642 0XXX1XXX2XXX6XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CAREY ID
2022-01-13 986-746 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J INDIAN VLY ID
2022-01-13 986-926 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ASHTON ID
2022-01-13 986-982 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J CLAYTON ID
2022-01-12 209-876 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MODESTO CA
2022-01-12 209-961 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MODESTO CA
2022-01-12 228-837 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HURLEY MS
2022-01-12 260-295 0XXX1XXX8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ARCOLA IN
2022-01-12 305-462 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2022-01-12 343-581 not yet reported which blocks → Fibernetics Corporation 464D Adolphustown —
2022-01-12 343-582 not yet reported which blocks → Fibernetics Corporation 464D Deseronto —
2022-01-12 343-594 not yet reported which blocks → Fibernetics Corporation 464D Wolfe Island —
2022-01-12 479-485 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FAYETTEVL AR
2022-01-12 501-524 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J VILONIA AR
2022-01-12 504-409 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2022-01-12 548-375 not yet reported which blocks → Fibernetics Corporation 464D Ridgetown —
2022-01-12 548-376 not yet reported which blocks → Fibernetics Corporation 464D Thamesville —
2022-01-12 548-377 not yet reported which blocks → Fibernetics Corporation 464D Tilbury —
2022-01-12 548-378 not yet reported which blocks → Fibernetics Corporation 464D Wallaceburg —
2022-01-12 609-875 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ATLNTIC CY NJ
2022-01-12 657-832 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SILVERADO CA
2022-01-12 747-326 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BRBN SNVY CA
2022-01-12 747-767 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN GRHL CA
2022-01-12 747-832 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN SNFN CA

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.