NumberResearch Membership · Data 10/01/2026

Recent prefix assignments

374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 505-721 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 GALLUP NM
— 505-722 not yet reported which blocks → QWEST CORPORATION 9636 GALLUP NM
— 505-723 3XXX8XXX · 2 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 SANOSTEE NM
— 505-724 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-726 3XXX4XXX · 2 holders which blocks → QWEST CORPORATION 9636 GALLUP NM
— 505-727 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-730 4XXX which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
— 505-731 1XXX8XXX · 2 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 TORREON NM
— 505-732 2XXX6XXX7XXX · 3 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 NASCHITTI NM
— 505-733 4XXX5XXX6XXX · 3 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 TOHATCHI NM
— 505-735 3XXX8XXX · 2 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 TWIN LAKES NM
— 505-747 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 ESPANOLA NM
— 505-753 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 ESPANOLA NM
— 505-757 not yet reported which blocks → CENTURYTEL SOUTHWEST INC-NM DBA CENTURYLINK - NM 2274 PECOS NM
— 505-761 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-764 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-765 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-766 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-767 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-768 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-771 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-775 not yet reported which blocks → CENTURYTEL SOUTHWEST INC-NM DBA CENTURYLINK - NM 2274 PINE HILL NM
— 505-777 3XXX5XXX8XXX · 3 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 NAVAJO NM
— 505-778 not yet reported which blocks → CENTURYTEL SOUTHWEST INC-NM DBA CENTURYLINK - NM 2274 VANDERWGON NM
— 505-780 4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 SANTA FE NM
— 505-782 1XXX which blocks → CENTURYTEL SOUTHWEST INC-NM DBA CENTURYLINK - NM 2274 ZUNI NM
— 505-783 not yet reported which blocks → CENTURYTEL SOUTHWEST INC-NM DBA CENTURYLINK - NM 2274 RAMAH NM
— 505-786 not yet reported which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 CROWNPOINT NM
— 505-788 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CENTURYTEL SOUTHWEST INC-NM DBA CENTURYLINK - NM 2274 FENCE LAKE NM
— 505-789 2XXX8XXX · 2 holders which blocks → NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM 4450 TOADLENA NM
— 505-792 6XXX which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-794 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 7464 ALBUQURQUE NM
— 505-796 2XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-797 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-798 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NM
— 505-816 7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-819 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 SANTA FE NM
— 505-820 not yet reported which blocks → QWEST CORPORATION 9636 SANTA FE NM
— 505-821 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-822 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 505-823 not yet reported which blocks → QWEST CORPORATION 9636 ALBUQURQUE NM
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.