NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 971
NEW CINGULAR WIRELESS PCS, LLC 1
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
2013-05-20 971-308 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F CANNON BCH OR
2013-05-20 971-320 0–9 XXXall 10 · 9 holders which blocks → T-MOBILE USA, INC. 6529 SEASIDE OR
2013-04-24 971-274 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRESHAM OR
2013-01-17 971-309 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 WILLAMINA OR
2012-12-26 971-312 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MCMINNVL OR
2012-12-03 971-317 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BEAVERTON OR
2012-11-20 971-444 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E WOODBURN OR
2012-11-20 971-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2012-11-20 971-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2012-11-20 971-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E YAMHILL OR
2012-10-09 971-305 7XXX which blocks → COMCAST IP PHONE, LLC 318J MONITOR OR
2012-10-05 971-304 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2012-10-03 971-276 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2012-09-28 971-301 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E SALEM OR
2012-09-28 971-302 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2012-08-13 971-281 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E NEWBERG OR
2012-07-25 971-251 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F RAINIER OR
2012-05-24 971-717 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2012-03-06 971-303 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2012-02-16 971-260 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F CLATSKANIE OR
2012-02-16 971-512 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2012-01-25 971-254 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2011-12-22 971-282 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
2011-12-12 971-202 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2011-12-08 971-201 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2011-11-08 971-256 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F PORTLAND OR
2011-11-03 971-203 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST HELENS OR
2011-08-12 971-273 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2011-08-10 971-229 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2011-08-09 971-271 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2011-06-13 971-263 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2011-05-10 971-261 0–9 XXXall 10 · 9 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F MCMINNVL OR
2011-04-08 971-258 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2011-04-04 971-266 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 PORTLAND OR
2011-03-16 971-295 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J PORTLAND OR
2011-03-10 971-599 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 SALEM OR
2011-03-01 971-600 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F SALEM OR
2011-03-01 971-800 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F MILL CITY OR
2011-01-10 971-400 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2010-12-16 971-200 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2010-12-16 971-300 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2010-10-12 971-310 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BEAVERTON OR
2010-10-11 971-313 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
2010-09-22 971-373 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PORTLAND OR
2010-09-09 971-277 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2010-09-01 971-264 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F NEWBERG OR
2010-09-01 971-333 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F HOOD LAND OR
2010-08-31 971-265 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GARIBALDI OR
2010-08-31 971-306 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ROCKAWAY OR
2010-08-11 971-262 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9638 PORTLAND OR

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.