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 575
QWEST CORPORATION 77
ONVOY, LLC - NM 54
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 51
T-MOBILE USA, INC. 37
NEW CINGULAR WIRELESS PCS, LLC - IL 37
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
2026-04-23 575-350 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROY NM
2026-01-09 575-438 2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → AHOI LLC 883K LAS CRUCES NM
2025-11-14 575-349 3XXX which blocks → TDS METROCOM, LLC 520K SOCORRO NM
2025-09-05 575-348 0XXX1XXX2XXX · 2 holders which blocks → TDS BROADBAND SERVICE LLC 641H ALAMOGORDO NM
2025-07-30 575-406 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C CANNON AFB NM
2025-07-30 575-407 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C CANNON AFB NM
2025-07-30 575-409 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C CANNON AFB NM
2025-07-30 575-410 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C CANNON AFB NM
2025-07-30 575-412 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C CANNON AFB NM
2025-07-22 575-344 4XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CANNON AFB NM
2025-03-11 575-340 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HOBBS NM
2025-03-11 575-341 0XXX1XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CARLSBAD NM
2024-11-08 575-331 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LAS CRUCES NM
2024-09-12 575-328 0XXX1XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SILVERCITY NM
2024-03-21 575-324 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NM 206F ALAMOGORDO NM
2024-03-21 575-326 0XXX1XXX2XXX3XXX · 4 holders which blocks → ONVOY, LLC - NM 206F ANTHONY NM
2024-03-07 575-321 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLOVIS NM
2024-02-12 575-319 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2024-02-09 575-515 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LAS CRUCES NM
2024-02-09 575-565 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H SNA TERESA NM
2024-02-05 575-505 0XXX5XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H TIERRAAMRL NM
2024-01-23 575-316 9XXX which blocks → T-MOBILE USA, INC. 6529 TAOS NM
2023-10-17 575-314 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALAMOGORDO NM
2023-10-06 575-307 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CARLSBAD NM
2023-09-06 575-306 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ROSWELL NM
2023-08-08 575-301 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H ARTESIA NM
2023-08-08 575-304 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H CHAPARRAL NM
2023-07-26 575-296 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2023-05-18 575-310 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NM 206F RUIDOSO NM
2023-05-03 575-298 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HOBBS NM
2022-12-29 575-290 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALAMOGORDO NM
2022-10-19 575-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H ANTHONY NM
2022-09-26 575-575 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NM 206F ROSWELL NM
2022-08-25 575-286 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALAMOGORDO NM
2022-05-09 575-750 0XXX7XXX · 2 holders which blocks → ONVOY, LLC - NM 206F CLOUDCROFT NM
2022-04-14 575-765 7XXX which blocks → ONVOY, LLC - NM 206F CARRIZOZO NM
2022-03-23 575-775 5XXX7XXX · 2 holders which blocks → ONVOY, LLC - NM 206F TULAROSA NM
2022-03-04 575-757 0XXX5XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOCORRO NM
2022-03-03 575-299 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DEMING NM
2022-03-03 575-966 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LA MESA NM
2022-03-01 575-599 0XXX1XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RED RIVER NM
2022-03-01 575-916 8XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GALLINA NM
2022-02-28 575-295 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2022-02-24 575-688 0XXX6XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CRLSBACRNS NM
2022-02-24 575-722 2XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CANJILON NM
2022-02-24 575-788 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BAYARD NM
2022-02-23 575-294 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2022-02-02 575-463 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAS CRUCES NM
2022-01-26 575-287 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F JAL NM
2022-01-14 575-327 0XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CUBA NM

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.