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
2023-05-05 505-568 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2023-03-10 505-547 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2023-02-24 505-548 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J ALBUQURQUE NM
2023-02-10 505-549 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2023-02-07 505-546 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2022-12-07 505-543 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2022-11-03 505-537 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2022-10-28 505-536 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2022-10-28 505-538 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 WHITE ROCK NM
2022-10-26 505-534 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2022-10-24 505-648 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AZTEC NM
2022-10-18 505-541 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2022-10-07 505-531 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J SANTA FE NM
2022-09-30 505-542 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ESPANOLA NM
2022-09-30 505-868 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2022-09-26 505-505 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NM 206F SANTA FE NM
2022-09-20 505-532 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-08-17 505-528 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ALBUQURQUE NM
2022-08-10 505-527 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2022-07-14 505-524 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J ALBUQURQUE NM
2022-07-13 505-526 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2022-05-27 505-523 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-05-20 505-513 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2022-04-25 505-518 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2022-03-28 505-517 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2022-03-10 505-464 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-03-10 505-887 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANTS NM
2022-03-03 505-626 0XXX1XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OJOCALINTE NM
2022-03-03 505-646 2XXX4XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FENCE LAKE NM
2022-03-01 505-562 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J DIXON NM
2022-02-28 505-746 0XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHIMAYO NM
2022-02-18 505-520 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H ALBUQURQUE NM
2022-02-01 505-525 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
2022-01-27 505-479 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
2021-12-10 505-519 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2021-11-24 505-460 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ALBUQURQUE NM
2021-11-18 505-512 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F FARMINGTON NM
2021-10-13 505-498 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LAS VEGAS NM
2021-09-13 505-497 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2021-09-08 505-496 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 GRANTS NM
2021-08-23 505-644 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SANTA FE NM
2021-08-23 505-755 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ESPANOLA NM
2021-07-29 505-491 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2021-07-29 505-493 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2021-07-27 505-482 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F FARMINGTON NM
2021-07-22 505-487 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LOS ALAMOS NM
2021-06-23 505-483 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F AZTEC NM
2021-06-17 505-472 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2021-05-04 505-478 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2021-05-04 505-481 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP 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.