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
2024-06-20 971-489 0–9 XXXall 10 · 2 holders which blocks → CALLWORKS CORPORATION 475J PORTLAND OR
2024-05-30 971-488 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2024-05-10 971-487 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BEAVERTON OR
2024-03-25 971-486 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2024-03-07 971-485 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2024-02-12 971-482 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H BEAVERTON OR
2024-02-12 971-483 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H SALEM OR
2024-02-12 971-484 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2024-02-09 971-481 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2024-02-08 971-480 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2024-01-19 971-479 0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ASTORIA OR
2023-12-21 971-478 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-12-07 971-477 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BEAVERTON OR
2023-12-05 971-476 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2023-12-04 971-472 0–9 XXXall 10 · 2 holders which blocks → FIVE9, INC. 598J PORTLAND OR
2023-12-04 971-474 0XXX1XXX6XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 WOODBURN OR
2023-12-04 971-475 1XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SEASIDE OR
2023-10-18 971-469 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2023-10-10 971-468 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DALLAS OR
2023-10-09 971-467 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 PORTLAND OR
2023-10-04 971-360 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PORTLAND OR
2023-09-27 971-464 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2023-09-25 971-997 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2023-09-19 971-462 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2023-09-19 971-463 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E STFRD-SNDY OR
2023-09-12 971-461 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 MCMINNVL OR
2023-09-06 971-460 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H PORTLAND OR
2023-08-31 971-459 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2023-08-24 971-458 0–9 XXXall 10 · 4 holders which blocks → ALYRICA TELEPHONE LLC DBA NEXT GEN PHONE SYS-OR 9882 SALEM OR
2023-08-17 971-457 2XXX which blocks → ONVOY, LLC - OR 750E GRANDRONDE OR
2023-08-10 971-456 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2023-08-04 971-243 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NEWBERG OR
2023-08-02 971-455 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 WOODBURN OR
2023-07-25 971-454 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-07-11 971-453 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALEM OR
2023-06-15 971-452 4XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 BEAVER OR
2023-04-11 971-450 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-04-11 971-451 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2023-03-02 971-449 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J PORTLAND OR
2023-02-10 971-917 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2023-01-27 971-448 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-01-13 971-446 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2023-01-13 971-447 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2023-01-11 971-443 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OR
2022-11-02 971-442 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2022-10-21 971-441 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F BEAVERTON OR
2022-10-20 971-440 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2022-10-03 971-439 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J BEAVERTON OR
2022-10-03 971-471 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E CLACKAMAS OR
2022-09-27 971-438 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F 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.