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
2016-06-06 934-420 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
2016-06-03 406-970 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BILLINGS MT
2016-06-03 475-300 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D NEW HAVEN CT
2016-06-03 563-214 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DAVENPORT IA
2016-06-03 631-931 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - NY 705G E HAMPTON NY
2016-06-03 646-868 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D NWYRCYZN01 NY
2016-06-03 715-293 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUDSON WI
2016-06-03 779-248 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GALENA IL
2016-06-03 813-853 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D TAMPACEN FL
2016-06-03 910-513 5XXX9XXX · 2 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 LAURELHILL NC
2016-06-03 913-280 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2016-06-03 937-990 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K XENIA OH
2016-06-02 331-252 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 WARRENVL IL
2016-06-02 430-252 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SULPHURSPG TX
2016-06-02 484-954 0–9 XXXall 10 · 6 holders which blocks → WIDE VOICE, LLC - PA 218H ALLENTOWN PA
2016-06-02 641-244 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OTTUMWA IA
2016-06-02 717-803 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER PA
2016-06-02 727-626 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - FL 704G TARPON SPG FL
2016-06-02 786-776 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - FL 704G PERRINE FL
2016-06-02 828-417 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 ASHEVILLE NC
2016-06-01 262-698 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WI 225C BURLINGTON WI
2016-06-01 424-388 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MALIBU CA
2016-06-01 438-849 not yet reported which blocks → Bell Mobility 6574 Montreal —
2016-06-01 484-757 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W CHESTER PA
2016-06-01 587-993 not yet reported which blocks → Bell Mobility 6574 Calgary —
2016-06-01 647-935 not yet reported which blocks → Bell Mobility 6574 Toronto —
2016-06-01 857-385 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER MA
2016-06-01 984-213 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 SELMA NC
2016-05-31 236-744 not yet reported which blocks → Navigata Communications Limited 078G Kitsault —
2016-05-31 236-745 not yet reported which blocks → Navigata Communications Limited 078G Kitwanga —
2016-05-31 236-746 not yet reported which blocks → Navigata Communications Limited 078G Klemtu —
2016-05-31 236-747 not yet reported which blocks → Navigata Communications Limited 078G Lakelse —
2016-05-31 236-748 not yet reported which blocks → Navigata Communications Limited 078G Port Simpson —
2016-05-31 236-749 not yet reported which blocks → Navigata Communications Limited 078G Stewart —
2016-05-31 236-750 not yet reported which blocks → Navigata Communications Limited 078G Telkwa —
2016-05-31 236-751 not yet reported which blocks → Navigata Communications Limited 078G Topley —
2016-05-30 236-435 not yet reported which blocks → Distributel 081E Agassiz —
2016-05-30 236-436 not yet reported which blocks → Distributel 081E Chilliwack —
2016-05-30 236-437 not yet reported which blocks → Distributel 081E Mission —
2016-05-30 236-438 not yet reported which blocks → Distributel 081E Rosedale —
2016-05-30 236-439 not yet reported which blocks → Distributel 081E Sardis —
2016-05-30 236-440 not yet reported which blocks → Distributel 081E Yarrow —
2016-05-30 236-441 not yet reported which blocks → Distributel 081E Hemlock Valley —
2016-05-30 236-442 not yet reported which blocks → Distributel 081E Hope —
2016-05-30 236-443 not yet reported which blocks → Distributel 081E Yale —
2016-05-30 236-736 not yet reported which blocks → Navigata Communications Limited 078G Port Edward —
2016-05-30 236-737 not yet reported which blocks → Navigata Communications Limited 078G Aiyansh —
2016-05-30 236-738 not yet reported which blocks → Navigata Communications Limited 078G Bella Bella —
2016-05-30 236-739 not yet reported which blocks → Navigata Communications Limited 078G Greenville —
2016-05-30 236-740 not yet reported which blocks → Navigata Communications Limited 078G Hartley Bay —

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.