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
2018-10-15 971-355 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALEM OR
2018-09-13 971-341 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2018-09-07 971-399 0–9 XXXall 10 · 8 holders which blocks → INVOXIO INCORPORATED 158H FALLS CITY OR
2018-09-07 971-799 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → INVOXIO INCORPORATED 158H WESTPORT OR
2018-08-24 971-900 0–9 XXXall 10 · 6 holders which blocks → INVOXIO INCORPORATED 158H SALEM OR
2018-08-17 971-990 0–9 XXXall 10 · 4 holders which blocks → INVOXIO INCORPORATED 158H PORTLAND OR
2018-08-06 971-335 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2018-08-02 971-332 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2018-07-10 971-329 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2018-06-22 971-326 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SEASIDE OR
2018-06-19 971-323 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2018-05-09 971-299 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GOVENTCAMP OR
2018-02-15 971-289 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F DALLAS OR
2018-01-30 971-324 0XXX2XXX5XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K NEHALEM OR
2017-12-12 971-297 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2017-11-08 971-296 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → ASTOUND BROADBAND, LLC - OR 936F WESTPORT OR
2017-10-10 971-666 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2017-09-14 971-294 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2017-09-12 971-377 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E CLACKAMAS OR
2017-08-21 971-350 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2017-08-16 971-293 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GRESHAM OR
2017-08-11 971-292 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 GRESHAM OR
2017-07-06 971-291 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2017-06-28 971-420 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D PORTLAND OR
2017-06-08 971-290 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCAPPOOSE OR
2017-04-27 971-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H PORTLAND OR
2017-03-14 971-288 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H PORTLAND OR
2017-03-13 971-287 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MCMINNVL OR
2016-11-30 971-978 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2016-09-16 971-864 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BEAVERTON OR
2016-08-15 971-432 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 WOODBURN OR
2016-08-01 971-762 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F BEAVERTON OR
2016-07-26 971-754 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 TELECOM OF OREGON, LLC - OR 7537 PORTLAND OR
2016-07-22 971-865 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2016-06-23 971-757 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ST HELENS OR
2016-05-18 971-940 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PORTLAND OR
2016-05-16 971-401 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2016-03-11 971-812 0XXX1XXX2XXX3XXX7XXX8XXX · 2 holders which blocks → ELTOPIA COMMUNICATIONS LLC - OR 647F SCAPPOOSE OR
2016-03-08 971-347 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G PORTLAND OR
2016-03-08 971-370 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 SILVERTON OR
2016-02-04 971-286 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 WARRENTON OR
2016-01-15 971-517 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MCMINNVL OR
2015-12-21 971-386 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PORTLAND OR
2015-11-18 971-351 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2015-10-05 971-606 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ASTORIA OR
2015-10-05 971-612 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F DALLAS OR
2015-09-29 971-930 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2015-09-23 971-727 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BEAVERTON OR
2015-09-16 971-724 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2015-08-11 971-413 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 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.