NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-26 540-530 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 UPPERVILLE VA
2018-06-26 551-280 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F JERSEYCITY NJ
2018-06-26 571-360 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 INDENDNTHL VA
2018-06-26 571-370 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 ARCOLA VA
2018-06-26 571-380 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 LORTON VA
2018-06-26 571-390 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 NOKESVILLE VA
2018-06-26 757-210 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CAPECHARLS VA
2018-06-26 757-260 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CHUCKATUCK VA
2018-06-26 757-429 0–9 XXXwhole prefix which blocks → CORETEL VIRGINIA, LLC - VA 5832 TEMPERNCVL VA
2018-06-26 757-526 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 HOLLAND VA
2018-06-26 757-530 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 NRFOLKZON3 VA
2018-06-26 757-586 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 NWPTNWSZN1 VA
2018-06-26 757-590 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 TANGIER VA
2018-06-26 757-601 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CLAREMONT VA
2018-06-26 757-684 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 WAKEFIELD VA
2018-06-26 757-760 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 DENDRON VA
2018-06-26 804-406 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 ASHLAND VA
2018-06-26 804-408 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CHARLES CY VA
2018-06-26 804-430 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 FIFE VA
2018-06-26 804-460 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 GOOCHLAND VA
2018-06-26 804-470 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 GUM TREE VA
2018-06-26 804-471 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 HOPEWELL VA
2018-06-26 804-473 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 KINGWILLIM VA
2018-06-26 804-487 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 KNGANDQUEN VA
2018-06-26 804-488 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 PROVICFORG VA
2018-06-26 804-494 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 WARSAW VA
2018-06-26 804-498 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 WEST POINT VA
2018-06-26 804-607 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 HAYES VA
2018-06-26 929-479 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN07 NY
2018-06-25 205-751 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E CARBONHILL AL
2018-06-25 206-636 0–9 XXXall 10 · 3 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J SEATTLE WA
2018-06-25 209-301 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MODESTO CA
2018-06-25 321-294 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MELBOURNE FL
2018-06-25 351-204 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 LAWRENCE MA
2018-06-25 405-894 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STILLWATER OK
2018-06-25 413-360 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D SANDISFLD MA
2018-06-25 540-697 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 WINCHESTER VA
2018-06-25 602-857 0–9 XXXall 10 · 3 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J PHOENIX AZ
2018-06-25 608-802 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 BELOIT WI
2018-06-25 813-497 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2018-06-25 820-200 0–9 XXXall 10 · 5 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J THOUSAOAKS CA
2018-06-25 850-318 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C CRAWFORDVL FL
2018-06-25 859-788 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON KY
2018-06-25 929-478 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN07 NY
2018-06-25 929-481 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NWYRCYZN06 NY
2018-06-25 986-497 0–9 XXXall 10 · 8 holders which blocks → MILLENNIUM NETWORKS, LLC - ID 022G IDAHOFALLS ID
2018-06-25 989-279 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E HOUGHTONLK MI
2018-06-22 365-692 not yet reported which blocks → Iristel Inc. 154E Markham —
2018-06-22 365-693 not yet reported which blocks → Iristel Inc. 154E Markham —
2018-06-22 365-694 not yet reported which blocks → Iristel Inc. 154E Markham —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.