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
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
2019-02-14 680-829 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 SANDYCREEK NY
2019-02-14 720-776 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F DECKERS CO
2019-02-14 838-224 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WELLS NY
2019-02-14 838-228 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WINDHAM NY
2019-02-14 838-256 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 LKPLEASANT NY
2019-02-14 838-282 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 LYON MT NY
2019-02-14 838-336 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 PALENVILLE NY
2019-02-14 838-384 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 CASTLETON NY
2019-02-14 838-386 0–9 XXXall 10 · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 TROY NY
2019-02-14 838-435 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 CLAVERACK NY
2019-02-14 838-438 0–9 XXXall 10 · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 SALEM NY
2019-02-14 838-468 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WHITEHALL NY
2019-02-14 838-529 0XXX2XXX3XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 FONDA NY
2019-02-14 838-639 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 DELANSON NY
2019-02-14 838-697 6XXX8XXX · 2 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 BROADALBIN NY
2019-02-14 838-842 0XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 GERMANTOWN NY
2019-02-14 845-766 0–9 XXXall 10 · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 ELLENVILLE NY
2019-02-14 845-829 0–9 XXXall 10 · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 FLEISCHMAS NY
2019-02-14 845-843 0–9 XXXall 10 · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 MIDDLETOWN NY
2019-02-14 845-921 0–9 XXXall 10 · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 NEW PALTZ NY
2019-02-14 845-927 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 NORTHCLOVE NY
2019-02-14 845-931 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 TIVOLI NY
2019-02-14 845-946 0–9 XXXall 10 · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 COLDSPRING NY
2019-02-14 845-971 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 WASHIGTNVL NY
2019-02-14 845-990 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 MONTGOMERY NY
2019-02-13 205-797 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E PANOLA AL
2019-02-13 216-270 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F INDEPNDNCE OH
2019-02-13 226-553 not yet reported which blocks → Fibernetics Corporation 464D Tillsonburg —

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.