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
2022-09-19 971-437 0XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CANBYNEEDY OR
2022-09-15 971-436 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H GRESHAM OR
2022-08-26 971-435 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
2022-08-19 971-434 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STFRD-SNDY OR
2022-07-01 971-431 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GRESHAM OR
2022-07-01 971-433 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F SALEM OR
2022-05-27 971-430 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2022-04-01 971-429 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2022-03-29 971-825 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLACKAMAS OR
2022-03-09 971-746 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MCMINNVL OR
2022-03-09 971-818 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AURORA OR
2022-03-08 971-428 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OR
2022-03-08 971-626 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SHERWOOD OR
2022-03-07 971-427 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2022-03-02 971-466 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SILVERTON OR
2022-03-02 971-668 1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RAINIER OR
2022-02-28 971-425 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2022-02-28 971-426 7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 ESTACADA OR
2022-02-28 971-766 0XXX5XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PACIFIC CY OR
2022-02-25 971-588 2XXX3XXX5XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GARIBALDI OR
2022-02-25 971-677 0XXX1XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILL CITY OR
2022-02-25 971-966 1XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRAND IS OR
2022-02-18 971-688 6XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLATSKANIE OR
2022-02-18 971-788 5XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLOVERDALE OR
2022-02-08 971-424 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F NEWBERG OR
2022-01-20 971-423 0XXX2XXX3XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J YAMHILL OR
2021-12-30 971-422 0XXX1XXX2XXX4XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F VERNONIA OR
2021-11-09 971-418 0XXX1XXX2XXX5XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F WARRENTON OR
2021-11-09 971-419 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2021-10-28 971-417 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2021-10-26 971-416 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F BEAVERTON OR
2021-10-25 971-415 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2021-10-18 971-414 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STFRD-SNDY OR
2021-09-13 971-410 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J BEAVERTON OR
2021-08-26 971-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLACKAMAS OR
2021-08-26 971-667 0XXX2XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H GOVENTCAMP OR
2021-08-20 971-408 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2021-08-10 971-405 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F BEAVERTON OR
2021-08-10 971-406 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F WOODBURN OR
2021-07-21 971-403 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F ASTORIA OR
2021-07-16 971-402 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F AMITY OR
2021-06-17 971-398 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OR
2021-05-05 971-397 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → TELNYX LLC 073H NORTH PL OR
2021-04-16 971-610 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2021-04-12 971-396 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2021-04-12 971-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BEAVERTON OR
2021-03-03 971-394 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J PORTLAND OR
2021-03-03 971-395 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SEASIDE OR
2021-02-09 971-445 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OR 750E WARRENTON OR
2021-02-03 971-970 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PACIFIC CY 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.