NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2022-02-22 810-302 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LAPEER MI
2022-02-22 810-722 2XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SMITHS CRK MI
2022-02-22 830-633 3XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J UTOPIA TX
2022-02-22 838-368 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MALONE NY
2022-02-22 840-208 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2022-02-22 854-269 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SUMMERVL SC
2022-02-22 878-248 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J GIBSONIA PA
2022-02-22 901-742 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ARLINGTON TN
2022-02-22 914-746 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WSCHSTZN08 NY
2022-02-22 914-865 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WSCHSTZN04 NY
2022-02-22 915-297 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 EL PASO TX
2022-02-22 931-426 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DOVER TN
2022-02-22 931-688 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CENTERVL TN
2022-02-22 934-649 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J STONYBROOK NY
2022-02-22 934-742 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PATCHOGUE NY
2022-02-22 985-463 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SLIDELL LA
2022-02-22 989-566 0XXX1XXX2XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MAYVILLE MI
2022-02-22 989-663 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MAPLE RPD MI
2022-02-21 213-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 12 CA
2022-02-21 309-967 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EASTMOLINE IL
2022-02-21 442-568 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ENCINITAS CA
2022-02-21 515-366 0XXX3XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DEXTER IA
2022-02-21 515-426 0XXX2XXX3XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DE SOTO IA
2022-02-21 559-669 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2022-02-21 563-478 4XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEW VIENNA IA
2022-02-21 563-624 3XXX4XXX5XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EPWORTH IA
2022-02-21 641-258 2XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ADAIR IA
2022-02-21 641-266 1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ACKLEY IA
2022-02-21 657-686 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GARDEN GRV CA
2022-02-21 712-462 0XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MISSOURVLY IA
2022-02-18 213-836 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 02 CA
2022-02-18 231-746 0XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHEBOYGAN MI
2022-02-18 239-944 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NAPLES FL
2022-02-18 239-955 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FORT MYERS FL
2022-02-18 272-727 2XXX3XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROME PA
2022-02-18 279-789 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SCRM MAIN CA
2022-02-18 308-253 0XXX1XXX2XXX3XXX7XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BIGSPRINGS NE
2022-02-18 313-746 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DETROITZN1 MI
2022-02-18 316-624 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWTON KS
2022-02-18 316-874 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EL DORADO KS
2022-02-18 319-675 0XXX1XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OXFORD IA
2022-02-18 331-426 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEMONT IL
2022-02-18 340-206 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ST CROIX VI
2022-02-18 341-688 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OKLD BKLY CA
2022-02-18 365-684 not yet reported which blocks → Fibernetics Corporation 464D Malton —
2022-02-18 385-461 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J SALT LAKE UT
2022-02-18 405-991 1XXX3XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K LINDSAY OK
2022-02-18 431-293 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2022-02-18 434-267 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J VOLENS VA
2022-02-18 434-746 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHATHAM VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.