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 601
METROPCS, INC. 21
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
2003-01-07 601-667 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 CANTON MS
2002-09-10 601-609 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 JACKSON MS
2002-09-10 601-610 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 HATTIESBG MS
2002-05-10 601-494 2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 WIGGINS MS
2002-05-10 601-566 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 JACKSON MS
2001-02-28 601-473 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 CLINTON MS
2001-01-31 601-451 4XXX5XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 FAYETTE MS
2001-01-04 601-392 0XXX2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 NATCHEZ MS
— 601-238 9XXX which blocks → METROPCS, INC. 5562 JACKSON MS
— 601-273 3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 PICAYUNE MS
— 601-299 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 HATTIESBG MS
— 601-301 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 VICKSBURG MS
— 601-329 0XXX2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 HATTIESBG MS
— 601-342 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 LAUREL MS
— 601-365 0XXX2XXX7XXX · 2 holders which blocks → METROPCS, INC. 5562 POPLARVL MS
— 601-434 4XXX5XXX7XXX · 2 holders which blocks → METROPCS, INC. 5562 HATTIESBG MS
— 601-454 none assigned yet which blocks → METROPCS, INC. 5562 JACKSON MS
— 601-456 0XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 VICKSBURG MS
— 601-462 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 MERIDIAN MS
— 601-880 0XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 MERIDIAN MS
— 601-983 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 JACKSON MS

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.