NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 813
METROPCS, INC. 53
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
2021-03-24 813-859 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
2020-12-11 813-608 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PLANT CITY FL
2020-08-19 813-593 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2020-01-08 813-219 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2018-12-13 813-553 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPANTH FL
2018-09-20 813-522 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPANTH FL
2017-01-05 813-730 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PLANT CITY FL
2017-01-04 813-378 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPAEST FL
2016-12-06 813-547 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2016-07-05 813-328 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2016-06-15 813-860 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2015-07-09 813-255 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2015-06-19 813-858 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2015-06-03 813-847 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2011-09-14 813-324 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPAEST FL
2011-04-01 813-279 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPANTH FL
2011-03-25 813-701 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
2010-02-24 813-445 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPAEST FL
2009-02-17 813-347 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2009-02-17 813-409 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPAEST FL
2009-02-17 813-475 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2008-07-08 813-863 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2008-04-29 813-408 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2008-04-10 813-379 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2008-04-08 813-384 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2008-03-26 813-381 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPAEST FL
2008-03-21 813-369 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
2007-03-01 813-410 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2006-05-19 813-446 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2006-05-19 813-532 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2006-04-07 813-412 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2006-03-20 813-531 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2006-02-23 813-506 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2006-01-30 813-802 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2005-11-22 813-458 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2005-10-11 813-516 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 TAMPA FL
2005-08-27 813-900 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 TAMPA FL
2005-03-24 813-965 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TAMPA FL
2002-03-27 813-355 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
2001-01-19 813-728 none assigned yet which blocks → METROPCS, INC. 5562 TAMPA FL
— 813-267 none assigned yet which blocks → METROPCS, INC. 5562 TAMPA FL
— 813-299 none assigned yet which blocks → METROPCS, INC. 5562 TAMPA FL
— 813-312 0XXX2XXX8XXX which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
— 813-376 7XXX which blocks → METROPCS, INC. 5562 TAMPA FL
— 813-462 0–9 XXXall 10 · 9 holders which blocks → METROPCS, INC. 5562 TAMPACEN FL
— 813-478 none assigned yet which blocks → METROPCS, INC. 5562 PLANT CITY FL
— 813-526 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPA FL
— 813-714 7XXX which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
— 813-845 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
— 813-917 none assigned yet which blocks → METROPCS, INC. 5562 TAMPA FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.