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
2020-03-03 309-570 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J PEORIA IL
2020-03-03 437-622 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-03 469-794 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LEWISVILLE TX
2020-03-03 626-547 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL MONTE CA
2020-03-03 914-550 0–9 XXXwhole prefix which blocks → LTE WIRELESS INC D/B/A LTE WIRELESS - NY 452J CHAPPAQUA NY
2020-03-03 956-528 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2020-03-02 208-294 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 FRUITLAND ID
2020-03-02 414-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MILWAUKZN4 WI
2020-03-02 414-842 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MILWAUKZN1 WI
2020-03-02 437-620 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-02 437-621 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-02 910-883 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2020-02-28 580-505 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODWARD OK
2020-02-28 657-423 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2020-02-28 657-450 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-02-28 657-471 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2020-02-28 681-330 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 GRAFTON WV
2020-02-28 737-787 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J AUSTIN TX
2020-02-28 786-751 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 KEYS FL
2020-02-28 951-519 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-02-27 236-500 not yet reported which blocks → Iristel Inc. 154E Penticton —
2020-02-27 409-254 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WOODVILLE TX
2020-02-27 709-309 not yet reported which blocks → Iristel Inc. 154E Marystown —
2020-02-27 786-750 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2020-02-27 867-280 not yet reported which blocks → Bell Mobility 6574 Yellowknife —
2020-02-27 931-340 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 CROSSVILLE TN
2020-02-26 236-646 not yet reported which blocks → Iristel Inc. 154E North Vancouver —
2020-02-26 343-453 not yet reported which blocks → Iristel Inc. 154E Belleville —
2020-02-26 346-423 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PORTER TX
2020-02-26 365-364 not yet reported which blocks → Iristel Inc. 154E Welland —
2020-02-26 405-860 0XXX1XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F PADEN OK
2020-02-26 864-566 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 GREENVILLE SC
2020-02-25 334-579 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOTHAN AL
2020-02-25 480-613 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2020-02-25 513-540 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C MIDDLETOWN OH
2020-02-25 608-808 0XXX1XXX8XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F BELMONT WI
2020-02-25 774-427 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA
2020-02-25 848-287 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TOMS RIVER NJ
2020-02-25 929-541 0–9 XXXwhole prefix which blocks → CSC WIRELESS, LLC 425J NWYRCYZN03 NY
2020-02-25 989-899 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAGINAW MI
2020-02-24 226-576 not yet reported which blocks → IXICA Communications Inc. 812H Rockwood —
2020-02-24 234-324 0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C BEACH CITY OH
2020-02-24 262-655 5XXX which blocks → FRACTEL, LLC 965H BERGEN WI
2020-02-24 309-903 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC 224C ROCKISLAND IL
2020-02-24 352-663 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 GAINESVL FL
2020-02-24 431-341 not yet reported which blocks → Iristel Inc. 154E Starbuck —
2020-02-24 506-404 not yet reported which blocks → Iristel Inc. 154E Richibucto —
2020-02-24 567-667 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H EDON OH
2020-02-24 567-677 0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OH 464C VAN BUREN OH
2020-02-24 639-309 not yet reported which blocks → Iristel Inc. 154E Lanigan —

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.