NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2021-03-02 206-638 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J SEATTLE WA
2021-03-02 208-470 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - ID 689F RATHDRUM ID
2021-03-02 209-866 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ANGELSCAMP CA
2021-03-02 307-293 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WY 450F GUERNSEY WY
2021-03-02 361-599 0XXX1XXX3XXX5XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H AGUA DULCE TX
2021-03-02 361-699 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MATHIS TX
2021-03-02 365-232 not yet reported which blocks → ISP Telecom Inc. 4727 Bowmanville —
2021-03-02 405-540 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J OKLA CITY OK
2021-03-02 409-699 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BUNA TX
2021-03-02 409-799 1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H EVADALE TX
2021-03-02 434-281 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J SOUTH HILL VA
2021-03-02 434-635 0XXX1XXX3XXX6XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DRAKESBRCH VA
2021-03-02 437-644 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-03-02 458-260 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROOKINGS OR
2021-03-02 507-783 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WINDOM MN
2021-03-02 509-610 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 COLFAX WA
2021-03-02 509-616 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J SPOKANE WA
2021-03-02 539-242 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J TULSA OK
2021-03-02 539-593 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2021-03-02 548-826 not yet reported which blocks → ISP Telecom Inc. 4727 Rockwood —
2021-03-02 581-867 not yet reported which blocks → TELUS Quebec 8083 Amqui —
2021-03-02 581-913 not yet reported which blocks → TELUS Quebec 8083 Chandler —
2021-03-02 581-917 not yet reported which blocks → TELUS Quebec 8083 Grande-Riviere —
2021-03-02 581-918 not yet reported which blocks → TELUS Quebec 8083 Chute-aux-Outardes —
2021-03-02 581-919 not yet reported which blocks → TELUS Quebec 8083 Baie-Comeau —
2021-03-02 581-921 not yet reported which blocks → TELUS Quebec 8083 Causapscal —
2021-03-02 585-688 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BROCKPORT NY
2021-03-02 603-710 0XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WASHINGTON NH
2021-03-02 605-401 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J SIOUX FLS SD
2021-03-02 620-420 0XXX1XXX2XXX5XXX8XXX · 5 holders which blocks → UNITED COMMUNICATIONS ASSOCIATION, INC. - KS 925G KINSLEY KS
2021-03-02 629-625 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ADMSCDARHL TN
2021-03-02 640-201 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J PLEASANTVL NJ
2021-03-02 640-202 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J TRENTON NJ
2021-03-02 737-799 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GRANGER TX
2021-03-02 737-864 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TAYLOR TX
2021-03-02 757-712 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CRITTENDEN VA
2021-03-02 845-718 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NEWBURGH NY
2021-03-02 862-361 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J NEWARK NJ
2021-03-02 920-357 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 DE PERE WI
2021-03-02 934-789 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ATLANTIC NY
2021-03-02 934-799 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BELLPORT NY
2021-03-02 936-599 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H SHEPHERD TX
2021-03-02 936-677 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H PLANTERSVL TX
2021-03-02 936-688 1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BROADDUS TX
2021-03-02 936-799 1XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H HULL TX
2021-03-02 945-386 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H FORNEY TX
2021-03-02 945-758 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ALLEN TX
2021-03-02 945-766 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H TERRELL TX
2021-03-02 947-366 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FARMINGTON MI
2021-03-02 979-348 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H NORTHRUP TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.