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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 51
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
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
2024-02-12 575-319 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2023-10-17 575-314 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALAMOGORDO NM
2023-07-26 575-296 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2023-05-03 575-298 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HOBBS NM
2022-02-23 575-294 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2021-08-11 575-281 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2021-03-09 575-247 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2021-02-16 575-246 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
2021-01-07 575-248 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HATCH NM
2020-11-17 575-244 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
2020-07-16 575-243 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2020-04-21 575-259 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2019-04-10 575-241 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HOBBS NM
2018-04-11 575-988 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CARLSBAD NM
2015-03-13 575-214 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALAMOGORDO NM
2014-12-31 575-419 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 DULCE NM
2013-08-10 575-361 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CARLSBAD NM
2013-08-10 575-626 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
2013-08-10 575-703 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2010-10-06 575-343 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 HATCH NM
2010-02-03 575-224 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TAOS NM
2008-12-03 575-952 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TRUTHCQNCS NM
2007-06-21 575-415 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALAMOGORDO NM
2007-06-21 575-654 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SILVERCITY NM
2007-06-21 575-936 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 DEMING NM
2006-08-24 575-694 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 DEMING NM
2006-05-01 575-519 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SILVERCITY NM
2005-05-31 575-973 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 RUIDOSO NM
2004-08-24 575-200 1XXX2XXX3XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CARLSBAD NM
2004-01-22 575-825 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 PORTALES NM
2003-06-24 575-707 4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 RATON NM
2003-06-24 575-708 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TUCUMCARI NM
2002-03-20 575-494 7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 DEMING NM
2001-12-18 575-218 2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CLOVIS NM
2001-05-14 575-313 8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SILVERCITY NM
— 575-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
— 575-416 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL NM
— 575-430 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALAMOGORDO NM
— 575-491 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALAMOGORDO NM
— 575-640 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
— 575-644 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
— 575-649 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
— 575-740 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TRUTHCQNCS NM
— 575-749 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CLOVIS NM
— 575-770 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TAOS NM
— 575-779 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TAOS NM
— 575-781 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA ROSA NM
— 575-840 0XXX1XXX2XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ROSWELL 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.