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
— 505-350 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-351 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 CHIMAYO NM
— 505-352 4XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-353 0XXX1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALBUQURQUE NM
— 505-360 2XXX4XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 FARMINGTON NM
— 505-362 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-363 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-366 1XXX3XXX4XXX7XXX8XXX9XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-367 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 ESPANOLA NM
— 505-368 not yet reported which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 SHIPROCK NM
— 505-371 2XXX4XXX7XXX · 3 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 TSE BONITO NM
— 505-379 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-380 not yet reported which blocks → SPOK, INC. 6630 ALBUQURQUE NM
— 505-384 6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-385 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-401 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-402 0XXX2XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 FARMINGTON NM
— 505-410 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NM
— 505-412 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LOS ALAMOS NM
— 505-424 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-425 not yet reported which blocks → QWEST CORPORATION 9636 LAS VEGAS NM
— 505-426 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 LAS VEGAS NM
— 505-428 0XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-429 6XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS VEGAS NM
— 505-432 not yet reported which blocks → NM
— 505-438 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-440 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-449 7XXX8XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-450 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-452 6XXX7XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-453 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-454 not yet reported which blocks → QWEST CORPORATION 9636 LAS VEGAS NM
— 505-455 6XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-459 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-462 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-463 none assigned yet which blocks → METROPCS, INC. 5562 ALBUQURQUE NM
— 505-465 4XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-466 5XXX which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-467 5XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-468 not yet reported which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-469 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
— 505-470 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
— 505-471 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-473 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-474 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-476 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-480 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-486 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
— 505-488 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9636 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.