NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-09-23 323-659 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2021-09-23 343-423 not yet reported which blocks → TekSavvy Solutions Inc 548H Stirling —
2021-09-23 343-424 not yet reported which blocks → TekSavvy Solutions Inc 548H Trenton —
2021-09-23 343-425 not yet reported which blocks → TekSavvy Solutions Inc 548H Thurlow —
2021-09-23 343-426 not yet reported which blocks → TekSavvy Solutions Inc 548H Tweed —
2021-09-23 343-427 not yet reported which blocks → TekSavvy Solutions Inc 548H Wellington —
2021-09-23 343-428 not yet reported which blocks → TekSavvy Solutions Inc 548H Wooler —
2021-09-23 365-537 not yet reported which blocks → TekSavvy Solutions Inc 548H Aurora —
2021-09-23 365-538 not yet reported which blocks → TekSavvy Solutions Inc 548H Bethesda —
2021-09-23 365-539 not yet reported which blocks → TekSavvy Solutions Inc 548H Bolton —
2021-09-23 365-541 not yet reported which blocks → TekSavvy Solutions Inc 548H Claremont —
2021-09-23 365-542 not yet reported which blocks → TekSavvy Solutions Inc 548H Gormley —
2021-09-23 365-543 not yet reported which blocks → TekSavvy Solutions Inc 548H Keswick —
2021-09-23 365-546 not yet reported which blocks → TekSavvy Solutions Inc 548H King City —
2021-09-23 413-807 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 PALMER MA
2021-09-23 424-459 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H HAWTHORNE CA
2021-09-23 442-369 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ENCINITAS CA
2021-09-23 470-852 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NELSON GA
2021-09-23 551-329 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H RIDGEWOOD NJ
2021-09-23 574-379 0XXX1XXX2XXX which blocks → COMMIO, LLC 939H AKRON IN
2021-09-23 585-799 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BYRON NY
2021-09-23 667-925 0–9 XXXall 10 · 6 holders which blocks → CORETEL MARYLAND, INC. - MD 469J BEL AIR MD
2021-09-23 680-577 2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FAYETTE NY
2021-09-23 779-797 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J ROCKFORD IL
2021-09-23 781-889 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 MARSHFIELD MA
2021-09-23 848-317 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H TOMS RIVER NJ
2021-09-23 857-491 0–9 XXXall 10 · 3 holders which blocks → LIGHTPATH OF NEW ENGLAND 814J BOSTON MA
2021-09-23 858-422 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CORONADO CA
2021-09-23 858-644 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SNDG MRMS CA
2021-09-23 928-431 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BLACK MESA AZ
2021-09-23 928-452 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BONITA AZ
2021-09-23 928-545 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TEECNOSPOS AZ
2021-09-23 934-867 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H AMITYVILLE NY
2021-09-23 980-362 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STATESVL NC
2021-09-23 980-412 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALBEMARLE NC
2021-09-22 224-418 7XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 ELK GROVE IL
2021-09-22 224-449 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ELGIN IL
2021-09-22 231-550 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 PETOSKEY MI
2021-09-22 276-658 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BASSETT VA
2021-09-22 276-968 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 MARTINSVL VA
2021-09-22 276-972 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 COEBURN VA
2021-09-22 343-354 not yet reported which blocks → TekSavvy Solutions Inc 548H Denbigh —
2021-09-22 343-403 not yet reported which blocks → TekSavvy Solutions Inc 548H Belleville —
2021-09-22 343-404 not yet reported which blocks → TekSavvy Solutions Inc 548H Bancroft —
2021-09-22 343-406 not yet reported which blocks → TekSavvy Solutions Inc 548H Arden —
2021-09-22 343-407 not yet reported which blocks → TekSavvy Solutions Inc 548H Bloomfield —
2021-09-22 343-408 not yet reported which blocks → TekSavvy Solutions Inc 548H Brighton —
2021-09-22 343-409 not yet reported which blocks → TekSavvy Solutions Inc 548H Cardiff —
2021-09-22 343-410 not yet reported which blocks → TekSavvy Solutions Inc 548H Coe Hill —
2021-09-22 343-413 not yet reported which blocks → TekSavvy Solutions Inc 548H Frankford —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.