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 321
METROPCS NETWORKS, LLC 39
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
2022-05-19 321-404 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2021-10-05 321-371 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2021-10-05 321-374 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
2021-09-09 321-365 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2021-04-15 321-359 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2020-12-11 321-335 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2019-12-17 321-340 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2019-03-28 321-306 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
2018-04-09 321-291 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2014-12-04 321-430 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2011-08-25 321-265 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
2011-08-16 321-261 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2007-10-18 321-362 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2007-10-18 321-458 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2007-07-06 321-208 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2007-04-10 321-304 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D WINTERPARK FL
2007-03-01 321-280 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D WINTERPARK FL
2006-08-29 321-682 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D KISSIMMEE FL
2006-08-29 321-746 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D KISSIMMEE FL
2006-08-29 321-805 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D ST CLOUD FL
2006-08-29 321-895 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D ST CLOUD FL
2006-07-13 321-594 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D WINTERPARK FL
2004-12-27 321-220 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
2004-10-28 321-216 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
2002-03-27 321-302 2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2002-03-26 321-363 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → METROPCS NETWORKS, LLC 899D SANFORD FL
2001-03-12 321-689 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2001-03-05 321-624 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D ST CLOUD FL
2001-01-19 321-695 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2001-01-19 321-696 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → METROPCS NETWORKS, LLC 899D SANFORD FL
— 321-262 0XXX2XXX4XXX5XXX8XXX · 2 holders which blocks → METROPCS NETWORKS, LLC 899D SANFORD FL
— 321-288 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
— 321-377 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D SANFORD FL
— 321-403 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
— 321-420 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D SANFORD FL
— 321-591 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
— 321-614 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
— 321-863 none assigned yet which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
— 321-999 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D SANFORD FL

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.