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 774
METROPCS, INC. 55
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
2021-05-12 774-733 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 DENNIS MA
2020-12-09 774-477 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WHITINSVL MA
2020-07-24 774-395 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ROCHESTER MA
2020-02-25 774-427 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA
2018-09-25 774-379 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2018-06-06 774-362 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATTLEBORO MA
2017-03-08 774-946 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WHITINSVL MA
2017-01-24 774-498 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA
2016-08-22 774-615 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA
2016-08-02 774-765 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 FOXBORO MA
2016-07-22 774-770 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NEWBEDFORD MA
2016-06-29 774-772 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 AUBURN MA
2016-02-26 774-778 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
2016-01-22 774-707 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA
2011-10-19 774-305 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NEWBEDFORD MA
2011-04-21 774-223 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BROCKTON MA
2011-03-11 774-329 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
2011-02-08 774-400 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NEWBEDFORD MA
2010-08-12 774-581 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FOXBORO MA
2010-07-08 774-992 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NEWBEDFORD MA
2010-03-02 774-381 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BROCKTON MA
2009-04-10 774-322 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2008-07-24 774-386 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 WORCESTER MA
2008-07-24 774-417 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 ROCHESTER MA
2008-07-24 774-578 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
2008-07-23 774-360 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 BROCKTON MA
2007-04-04 774-955 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2006-12-22 774-634 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NEWBEDFORD MA
2006-03-29 774-627 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2002-10-28 774-267 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 NORTHBORO MA
2002-10-24 774-201 none assigned yet which blocks → METROPCS, INC. 5562 WESTPORT MA
2002-10-24 774-219 none assigned yet which blocks → METROPCS, INC. 5562 FOXBORO MA
2002-10-24 774-269 0XXX which blocks → METROPCS, INC. 5562 SAGAMORE MA
2002-10-24 774-285 5XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 MARLBORO MA
2002-10-24 774-287 none assigned yet which blocks → METROPCS, INC. 5562 SHREWSBURY MA
2002-10-24 774-288 1XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WESTBORO MA
2002-10-24 774-289 none assigned yet which blocks → METROPCS, INC. 5562 AUBURN MA
2002-08-15 774-353 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 BREWSTER MA
2002-08-13 774-930 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2002-05-01 774-263 none assigned yet which blocks → METROPCS, INC. 5562 ROCHESTER MA
2002-04-18 774-248 3XXX6XXX7XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 HOPKINTON MA
2002-04-16 774-259 none assigned yet which blocks → METROPCS, INC. 5562 BROCKTON MA
2001-12-31 774-245 2XXX3XXX4XXX5XXX8XXX9XXX which blocks → METROPCS, INC. 5562 MARLBORO MA
2001-11-13 774-242 none assigned yet which blocks → METROPCS, INC. 5562 WORCESTER MA
2001-05-04 774-406 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 TAUNTON MA
2001-05-04 774-696 4XXX5XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
2001-05-04 774-836 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 OSTERVILLE MA
2001-05-03 774-229 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 SEEKONK MA
2001-03-20 774-535 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
— 774-216 3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 BREWSTER MA

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.