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
NEW CINGULAR WIRELESS PCS, LLC - IL 49
FRONTIER NORTH, INC.. - IN 45
INDIANA BELL TEL CO INC 43
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 38
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
— 574-931 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 SOUTH BEND 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
— 574-943 0XXX2XXX5XXX6XXX9XXX · 4 holders which blocks → FRONTIER MIDSTATES, INC. - IN 0831 IDAVILLE 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
— 574-950 not yet reported which blocks → IN
— 574-952 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARGOS IN
— 574-958 not yet reported which blocks → IN
— 574-959 not yet reported which blocks → IN
— 574-965 not yet reported which blocks → YEOMAN TEL. CO., INC. 0839 YEOMAN IN
— 574-966 5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL IN
— 574-967 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FLORA IN
— 574-968 not yet reported which blocks → PAETEC ITEL, LLC 829J SOUTH BEND IN
— 574-970 not yet reported which blocks → PAETEC ITEL, LLC 829J ELKHART IN
— 574-976 not yet reported which blocks → IN
— 574-993 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND 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.