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 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
— 505-489 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
— 505-490 4XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
— 505-495 not yet reported which blocks → SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 ZUNI NM
— 505-500 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 LOS ALAMOS NM
— 505-501 6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 SANTA FE NM
— 505-507 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NM
— 505-514 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ALBUQURQUE NM
— 505-530 not yet reported which blocks → SPOK, INC. 6630 ALBUQURQUE NM
— 505-540 not yet reported which blocks → SPOK, INC. 6630 ALBUQURQUE NM
— 505-550 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-551 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H LOS ALAMOS NM
— 505-552 2XXX3XXX4XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NM
— 505-558 not yet reported which blocks → NM
— 505-559 0XXX3XXX4XXX · 2 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-563 0XXX which blocks → LEVEL 3 TELECOM OF NEW MEXICO, LLC - NM 7457 ALBUQURQUE NM
— 505-564 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-565 5XXX6XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-566 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-570 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SANTA FE NM
— 505-573 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-577 none assigned yet which blocks → METROPCS, INC. 5562 SANTA FE NM
— 505-579 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 DIXON NM
— 505-583 none assigned yet which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 OJOCALINTE NM
— 505-598 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-599 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON NM
— 505-604 none assigned yet which blocks → METROPCS, INC. 5562 ALBUQURQUE NM
— 505-610 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NM
— 505-615 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-620 not yet reported which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-629 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SANTA FE NM
— 505-632 not yet reported which blocks → QWEST CORPORATION 9636 AZTEC NM
— 505-634 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 AZTEC NM
— 505-655 not yet reported which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 PUEBLOPNTD NM
— 505-660 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
— 505-661 not yet reported which blocks → QWEST CORPORATION 9636 LOS ALAMOS NM
— 505-662 not yet reported which blocks → QWEST CORPORATION 9636 LOS ALAMOS NM
— 505-663 6XXX7XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 LOS ALAMOS NM
— 505-664 not yet reported which blocks → QWEST CORPORATION 9636 LOS ALAMOS NM
— 505-665 not yet reported which blocks → QWEST CORPORATION 9636 LOS ALAMOS NM
— 505-667 not yet reported which blocks → QWEST CORPORATION 9636 LOS ALAMOS NM
— 505-669 not yet reported which blocks → SPOK, INC. 6630 SANTA FE NM
— 505-670 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
— 505-672 5XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 WHITE ROCK NM
— 505-681 2XXX3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-685 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 ABIQUIU NM
— 505-688 none assigned yet which blocks → METROPCS, INC. 5562 ALBUQURQUE NM
— 505-689 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 TRUCHAS 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.