NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-03-21 647-805 not yet reported which blocks → Distributel 082E Toronto —
2016-03-21 662-780 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MS 719E ASHLAND MS
2016-03-21 701-807 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - ND 452F LARIMORE ND
2016-03-21 805-261 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SIMIVALLEY CA
2016-03-21 805-342 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OXNARD CA
2016-03-21 878-206 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E FAIRCHANCE PA
2016-03-21 910-415 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E FAIRMONT NC
2016-03-21 980-261 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BADIN NC
2016-03-18 315-830 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NEWARK NY
2016-03-18 337-243 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E CENTERVL LA
2016-03-18 337-420 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BALDWIN LA
2016-03-18 430-220 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C BRASHEAR TX
2016-03-18 430-223 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TX 903C PICKTON TX
2016-03-18 431-335 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2016-03-18 437-300 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-301 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-302 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-303 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-304 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-305 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-306 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-307 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-308 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 437-309 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2016-03-18 458-227 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E CRATERLAKE OR
2016-03-18 518-508 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E FREEHOLD NY
2016-03-18 518-510 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E PITTSTOWN NY
2016-03-18 518-513 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E VOORHEESVL NY
2016-03-18 585-312 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E ELBA NY
2016-03-18 585-316 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E KENDALL NY
2016-03-18 707-757 0–9 XXXall 10 · 6 holders which blocks → SONIC TELECOM, LLC - CA 433E SANTA ROSA CA
2016-03-18 731-312 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TN 525E CEDARGROVE TN
2016-03-18 830-490 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C POTH TX
2016-03-18 845-281 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MIDDLETOWN NY
2016-03-18 864-448 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 GREENVILLE SC
2016-03-18 929-302 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN08 NY
2016-03-18 931-441 0XXX1XXX2XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TN 525E LYNNVILLE TN
2016-03-18 936-277 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C RAYWOOD TX
2016-03-18 951-406 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ARLINGTON CA
2016-03-17 220-200 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C FRAZEYSBG OH
2016-03-17 239-747 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C FTMYERSBCH FL
2016-03-17 240-496 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2016-03-17 240-549 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2016-03-17 240-825 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2016-03-17 254-800 0–9 XXXall 10 · 6 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D TEMPLE TX
2016-03-17 256-291 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E RUSSELLVL AL
2016-03-17 312-825 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-03-17 331-300 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2016-03-17 352-701 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WEEKICHSPG FL
2016-03-17 430-234 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C HONEYGROVE TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.