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
2019-03-20 437-358 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-20 437-359 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-20 437-360 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-20 437-361 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-20 442-336 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H VTVL APVY CA
2019-03-20 442-348 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H VICTORVL CA
2019-03-20 480-605 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-20 484-837 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 EASTON PA
2019-03-20 530-799 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H MARYSVILLE CA
2019-03-20 540-800 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J CULPEPER VA
2019-03-20 551-314 0–9 XXXall 10 · 4 holders which blocks → CORETEL NEW JERSEY, INC. - NJ 482F CLIFFSIDE NJ
2019-03-20 561-946 0–9 XXXall 10 · 4 holders which blocks → CORETEL FLORIDA, INC. - FL 481F WPALMBEACH FL
2019-03-20 620-529 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ST PAUL KS
2019-03-20 620-946 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → FRACTEL, LLC 965H CHETOPA KS
2019-03-20 650-418 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2019-03-20 650-977 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PACIFICA CA
2019-03-20 657-375 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ANA CA
2019-03-20 657-431 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 WESTMINSTR CA
2019-03-20 669-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SUNNYVALE CA
2019-03-20 669-696 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SNJS WEST CA
2019-03-20 707-855 0XXX1XXX2XXX3XXX5XXX · 5 holders which blocks → FRACTEL, LLC 965H POTTER VLY CA
2019-03-20 707-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SANTA ROSA CA
2019-03-20 786-692 0–9 XXXall 10 · 3 holders which blocks → CORETEL FLORIDA, INC. - FL 481F NORTH DADE FL
2019-03-20 786-733 0–9 XXXall 10 · 4 holders which blocks → CORETEL FLORIDA, INC. - FL 481F PERRINE FL
2019-03-20 831-208 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SALINAS CA
2019-03-20 831-348 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WATSONVL CA
2019-03-20 831-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CARMEL CA
2019-03-20 925-655 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CONCORD CA
2019-03-20 925-758 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LIVERMORE CA
2019-03-20 925-799 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PITTSBURG CA
2019-03-20 925-877 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ANTIOCH CA
2019-03-19 213-459 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2019-03-19 213-577 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LSAN DA 04 CA
2019-03-19 216-877 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J CLEVELAND OH
2019-03-19 254-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J WACO TX
2019-03-19 323-949 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-03-19 346-500 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J HOUSTON TX
2019-03-19 361-206 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 C CHRISTI TX
2019-03-19 430-900 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J PARIS TX
2019-03-19 434-800 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J LAWRENCEVL VA
2019-03-19 437-354 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-19 437-355 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-19 437-356 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-03-19 442-306 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 INDIO CA
2019-03-19 510-977 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H OKLD BKLY CA
2019-03-19 513-866 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J CINCINNATI OH
2019-03-19 561-468 0–9 XXXall 10 · 5 holders which blocks → CORETEL FLORIDA, INC. - FL 481F JUPITER FL
2019-03-19 561-639 0–9 XXXall 10 · 4 holders which blocks → CORETEL FLORIDA, INC. - FL 481F DELRAY BCH FL
2019-03-19 567-600 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J TOLEDO OH
2019-03-19 619-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNDG MRMS CA

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.