NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

372 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-02-15 518-718 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → ONVOY, LLC- NY 384C TANNERSVL NY
2019-02-15 531-530 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NE 549E LINCOLN NE
2019-02-15 607-837 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 HANCOCK NY
2019-02-15 646-989 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2019-02-15 657-371 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-02-15 807-470 not yet reported which blocks → TBayTel 988H Kenora —
2019-02-15 838-206 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C CLAVERACK NY
2019-02-15 838-500 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 ROUND LAKE NY
2019-02-15 838-766 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WARRENSBG NY
2019-02-15 929-513 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2019-02-15 929-603 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN10 NY
2019-02-15 949-550 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2019-02-15 970-705 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EAGLE CO
2019-02-15 970-706 3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RANGELY CO
2019-02-15 985-324 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 THIBODAUX LA
2019-02-14 315-961 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 ADAMS NY
2019-02-14 315-971 0–9 XXXall 10 · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 FAIR HAVEN NY
2019-02-14 405-597 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 BLANCHARD OK
2019-02-14 405-852 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 NEWCASTLE OK
2019-02-14 405-903 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 DIBBLE OK
2019-02-14 412-891 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PTGSBNZN20 PA
2019-02-14 437-680 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-02-14 437-681 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-02-14 437-682 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-02-14 437-683 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-02-14 437-686 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-02-14 437-687 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2019-02-14 470-469 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2019-02-14 470-487 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2019-02-14 470-666 0–9 XXXall 10 · 4 holders which blocks → CORETEL GEORGIA, INC. - GA 052G ATLANTA NW GA
2019-02-14 470-946 0–9 XXXall 10 · 4 holders which blocks → CORETEL GEORGIA, INC. - GA 052G CARROLLTON GA
2019-02-14 505-372 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 7464 SANTA FE NM
2019-02-14 509-505 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2019-02-14 512-886 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BUCHANNDAM TX
2019-02-14 531-321 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 ADAMS NE
2019-02-14 571-559 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2019-02-14 585-842 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 LYNDONVL NY
2019-02-14 585-940 0–9 XXXall 10 · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 LEICESTER NY
2019-02-14 585-990 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 NUNDA NY
2019-02-14 607-384 2XXX4XXX9XXX · 2 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 BURDETT NY
2019-02-14 607-440 0XXX2XXX4XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WHITESVL NY
2019-02-14 607-468 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 MCLEAN NY
2019-02-14 607-946 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 MILFORD NY
2019-02-14 607-990 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 SPENCER NY
2019-02-14 623-248 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2019-02-14 680-256 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WEEDSPORT NY
2019-02-14 680-384 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 LYSANDER NY
2019-02-14 680-435 0–9 XXXall 10 · 7 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 SYLVAN BCH NY
2019-02-14 680-758 6XXX9XXX · 2 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 NEWPORT NY
2019-02-14 680-766 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 MARION NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.