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
— 505-827 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-828 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-830 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-831 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-832 3XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-833 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-836 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-837 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-839 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-841 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-842 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-843 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-844 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-845 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-846 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-847 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-848 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-850 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-851 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-852 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 VELARDE NM
— 505-853 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-855 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-856 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-857 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-858 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-859 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ALBUQURQUE NM
— 505-860 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 FARMINGTON NM
— 505-861 9XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-862 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 GALLUP NM
— 505-863 not yet reported which blocks → QWEST CORPORATION 9636 GALLUP NM
— 505-864 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-865 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-866 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-867 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-869 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-870 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 GALLUP NM
— 505-872 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-873 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-875 none assigned yet which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-876 0XXX7XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 GRANTS NM
— 505-877 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-878 none assigned yet which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-879 4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 GALLUP NM
— 505-880 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-881 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-883 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-884 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-888 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-889 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-890 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE 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.