NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 505
QWEST CORPORATION 184
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 98
NEW CINGULAR WIRELESS PCS, LLC 77
T-MOBILE USA, INC. 65
ONVOY, LLC - NM 54
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
2026-07-22 505-674 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2026-02-23 505-963 7XXX which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ALBUQURQUE NM
2026-02-09 505-673 0XXX3XXX · 2 holders which blocks → WAVENATION, LLC 700J ALBUQURQUE NM
2025-10-22 505-671 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2025-09-18 505-656 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2025-08-27 505-668 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2025-07-07 505-529 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2025-06-02 505-654 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2025-05-28 505-580 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2025-04-17 505-706 0–9 XXXall 10 · 3 holders which blocks → WIDE VOICE, LLC - NM 427H ALBUQURQUE NM
2025-03-31 505-651 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ALBUQURQUE NM
2025-03-20 505-650 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F FARMINGTON NM
2025-02-13 505-649 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F SANTA FE NM
2025-02-07 505-647 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NM 206F AZTEC NM
2025-01-28 505-645 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H ALBUQURQUE NM
2025-01-08 505-618 0XXX2XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 WHITE ROCK NM
2024-12-20 505-643 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2024-11-25 505-641 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2024-11-25 505-642 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2024-11-15 505-640 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2024-10-24 505-638 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2024-10-14 505-637 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA FE NM
2024-09-10 505-631 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NM 206F AZTEC NM
2024-08-14 505-381 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FARMINGTON NM
2024-07-19 505-329 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2024-06-18 505-630 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2024-06-06 505-628 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F SANTA FE NM
2024-05-22 505-627 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2024-04-11 505-625 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2024-04-08 505-624 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2024-03-21 505-619 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F GALLUP NM
2024-03-21 505-621 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NM 206F LAS VEGAS NM
2024-03-21 505-623 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LOS ALAMOS NM
2024-02-14 505-616 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2024-02-09 505-613 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2024-02-02 505-607 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2024-01-26 505-602 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H SANTA FE NM
2024-01-11 505-601 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2023-10-30 505-597 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ALBUQURQUE NM
2023-09-19 505-586 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F FARMINGTON NM
2023-09-19 505-590 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F AZTEC NM
2023-09-06 505-584 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2023-08-30 505-578 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C ALBUQURQUE NM
2023-08-11 505-576 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 FARMINGTON NM
2023-08-02 505-574 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2023-07-18 505-572 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2023-07-05 505-575 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ALBUQURQUE NM
2023-05-15 505-571 0XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ABIQUIU NM
2023-05-15 505-581 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2023-05-05 505-556 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM

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.