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
2021-01-12 737-786 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H ELGIN TX
2021-01-12 779-678 0XXX1XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H ROCKFORD IL
2021-01-12 873-872 not yet reported which blocks → Fibernetics Corporation 464D Sherbrooke —
2021-01-12 947-272 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2021-01-11 208-905 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H COERDALENE ID
2021-01-11 213-543 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LSAN DA 03 CA
2021-01-11 223-246 0–9 XXXall 10 · 2 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 COLUMBIA PA
2021-01-11 256-884 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AL 604E MENTONE AL
2021-01-11 272-253 0–9 XXXall 10 · 2 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 THOMPSON PA
2021-01-11 309-850 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ILLINOISCY IL
2021-01-11 313-380 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2021-01-11 325-336 8XXX which blocks → FRACTEL, LLC 965H BIG VALLEY TX
2021-01-11 325-533 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C MILES TX
2021-01-11 334-776 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - AL 604E GEORGIANA AL
2021-01-11 334-815 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AL 604E SLOCOMB AL
2021-01-11 334-825 0XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - AL 604E LOUISVILLE AL
2021-01-11 346-453 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2021-01-11 346-454 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2021-01-11 386-355 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C POMONAPARK FL
2021-01-11 430-758 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SULPHURSPG TX
2021-01-11 430-799 0XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H WINDOM TX
2021-01-11 430-899 0XXX1XXX2XXX4XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H NECHES TX
2021-01-11 469-935 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C DALLAS TX
2021-01-11 470-746 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2021-01-11 470-753 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2021-01-11 479-425 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F ALMA AR
2021-01-11 501-464 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - AR 348F BALD KNOB AR
2021-01-11 509-517 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 YAKIMA WA
2021-01-11 520-534 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2021-01-11 534-500 0XXX1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H MARATHON WI
2021-01-11 534-800 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LAKEWOOD WI
2021-01-11 540-704 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H HARRISONBG VA
2021-01-11 563-291 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IA 221F DUBUQUE IA
2021-01-11 579-455 not yet reported which blocks → Fibernetics Corporation 464D St-Alphonse-de-Rodriguez —
2021-01-11 579-456 not yet reported which blocks → Fibernetics Corporation 464D St-Barthelemy —
2021-01-11 579-457 not yet reported which blocks → Fibernetics Corporation 464D Ste-Julienne —
2021-01-11 579-458 not yet reported which blocks → Fibernetics Corporation 464D St-Felix-de-Valois —
2021-01-11 579-459 not yet reported which blocks → Fibernetics Corporation 464D St-Gabriel-de-Brandon —
2021-01-11 579-460 not yet reported which blocks → Fibernetics Corporation 464D St-Jacques —
2021-01-11 579-461 not yet reported which blocks → Fibernetics Corporation 464D St-Jean-de-Matha —
2021-01-11 579-462 not yet reported which blocks → Fibernetics Corporation 464D St-Michel-des-Saints —
2021-01-11 579-463 not yet reported which blocks → Fibernetics Corporation 464D St-Zenon —
2021-01-11 628-276 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-01-11 659-224 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → ONVOY, LLC - AL 604E ALICEVILLE AL
2021-01-11 659-244 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - AL 604E REFORM AL
2021-01-11 659-264 0XXX1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - AL 604E NAUVOO AL
2021-01-11 659-274 0XXX1XXX2XXX5XXX · 3 holders which blocks → ONVOY, LLC - AL 604E OAKMAN AL
2021-01-11 708-659 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C OAK FOR SO IL
2021-01-11 725-243 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-01-11 737-285 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN 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.