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
2020-09-23 251-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H IRNGTNSTEL AL
2020-09-23 251-724 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MOBILE AL
2020-09-23 279-786 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCRM MAIN CA
2020-09-23 423-670 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J JOHNSON CY TN
2020-09-23 442-524 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J VTVL ADLN CA
2020-09-23 509-506 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2020-09-23 551-288 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C CLOSTER NJ
2020-09-23 562-560 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LONG BEACH CA
2020-09-23 609-244 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C PRINCETON NJ
2020-09-23 641-619 0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → IMON COMMUNICATIONS, LLC - IA 695G PELLA IA
2020-09-23 657-650 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ORANGE CA
2020-09-23 657-757 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2020-09-23 657-895 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-09-23 659-345 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BIRMINGHAM AL
2020-09-23 659-346 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SPRINGVL AL
2020-09-23 659-724 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H GORDO AL
2020-09-23 659-786 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H ETHELSVL AL
2020-09-23 659-946 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H YORK AL
2020-09-23 659-988 5XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H NECTAR AL
2020-09-23 661-512 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D PLDL AGDL CA
2020-09-23 712-399 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → QWEST CORPORATION 9631 MALVERN IA
2020-09-23 737-278 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BASTROP TX
2020-09-23 848-322 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C PTPLEASANT NJ
2020-09-23 848-377 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C EATONTOWN NJ
2020-09-23 848-412 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NJ 637C DEAL NJ
2020-09-23 848-455 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C JAMESBURG NJ
2020-09-23 908-466 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NJ 637C CALIFON NJ
2020-09-23 908-544 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NJ 637C FRENCHTOWN NJ
2020-09-23 909-893 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J S BERNDINO CA
2020-09-23 938-336 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H ODEN RIDGE AL
2020-09-23 956-593 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WESLACO TX
2020-09-23 985-826 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HAMMOND LA
2020-09-22 209-778 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TURLOCK CA
2020-09-22 209-792 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2020-09-22 209-859 0–9 XXXall 10 · 3 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2020-09-22 226-763 not yet reported which blocks → TELUS Integrated Communications 2782 Comber —
2020-09-22 236-499 not yet reported which blocks → Iristel Inc. 154E Kelowna —
2020-09-22 249-665 not yet reported which blocks → Fibernetics Corporation 464D Pefferlaw —
2020-09-22 249-666 not yet reported which blocks → Fibernetics Corporation 464D Udora —
2020-09-22 253-352 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E TACOMA WA
2020-09-22 365-849 not yet reported which blocks → Fibernetics Corporation 464D Gormley —
2020-09-22 469-891 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2020-09-22 470-656 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2020-09-22 484-724 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN10 PA
2020-09-22 581-202 not yet reported which blocks → Iristel Inc. 154E Alma —
2020-09-22 667-296 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 REISTERSTN MD
2020-09-22 825-435 not yet reported which blocks → Iristel Inc. 154E Leduc —
2020-09-22 825-445 not yet reported which blocks → Iristel Inc. 154E Stony Plain —
2020-09-21 213-724 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MONTEBELLO CA
2020-09-21 213-786 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H LSAN DA 04 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.