NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 574
BRIGHTSPEED OF INDIANA, LLC 35
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
2016-09-12 574-373 0–9 XXXall 10 · 5 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WARSAW IN
— 574-267 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WARSAW IN
— 574-268 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WARSAW IN
— 574-269 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WARSAW IN
— 574-371 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WARSAW IN
— 574-372 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WARSAW IN
— 574-453 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LEESBURG IN
— 574-457 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 SYRACUSE IN
— 574-526 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LEESBURG IN
— 574-528 4XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 SYRACUSE IN
— 574-542 5XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MONTEREY IN
— 574-546 6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 BREMEN IN
— 574-583 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MONTICELLO IN
— 574-586 1XXX5XXX6XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WALKERTON IN
— 574-594 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PIERCETON IN
— 574-642 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MILLERSBG IN
— 574-653 1XXX4XXX6XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 KEWANNA IN
— 574-654 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NEWCARLISL IN
— 574-656 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO LIBERTY IN
— 574-658 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MILFORD IN
— 574-664 8XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 TWELVEMILE IN
— 574-772 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 KNOX IN
— 574-773 8XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NAPPANEE IN
— 574-784 1XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LAPAZ IN
— 574-826 0XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 BURNETTSVL IN
— 574-834 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO WEBSTER IN
— 574-867 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 HAMLET IN
— 574-892 1XXX4XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 ARGOS IN
— 574-896 1XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO JUDSON IN
— 574-935 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-936 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-941 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-946 1XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WINAMAC IN
— 574-948 1XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-967 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FLORA IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.