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
QWEST CORPORATION 77
ONVOY, LLC - NM 54
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 51
T-MOBILE USA, INC. 37
NEW CINGULAR WIRELESS PCS, LLC - IL 37
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 575-671 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 RUIDOSO NM
— 575-673 not yet reported which blocks → E.N.M.R. TEL COOP 2262 MOSQUERO NM
— 575-675 not yet reported which blocks → ROOSEVELT COUNTY RURAL TEL. COOP., INC. 2272 MILNESAND NM
— 575-676 not yet reported which blocks → LEACO RURAL TEL. COOP., INC. 2264 MALJAMAR NM
— 575-677 not yet reported which blocks → PENASCO VALLEY TEL. COOP., INC. 2270 LOCO HILLS NM
— 575-678 not yet reported which blocks → QWEST CORPORATION 9636 LAS CRUCES NM
— 575-679 not yet reported which blocks → QWEST CORPORATION 9636 LAS CRUCES NM
— 575-682 not yet reported which blocks → TULAROSA BASIN TELEPHONE CO., INC. 2265 CLOUDCROFT NM
— 575-683 not yet reported which blocks → E.N.M.R. TEL COOP 2262 SO CLOVIS NM
— 575-684 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 CANJILON NM
— 575-687 not yet reported which blocks → PENASCO VALLEY TEL. COOP., INC. 2270 MAYHILL NM
— 575-693 0XXX2XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLOVIS NM
— 575-700 not yet reported which blocks → NM
— 575-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT NM
— 575-714 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLOVIS NM
— 575-734 not yet reported which blocks → LEACO RURAL TEL. COOP., INC. 2264 DEXTER NM
— 575-737 1XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 TAOS NM
— 575-738 not yet reported which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 HOBBS NM
— 575-739 not yet reported which blocks → LEACO RURAL TELEPHONE COOPERATIVE, INC. DBA LEACO 3798 LOVINGTON NM
— 575-740 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TRUTHCQNCS NM
— 575-741 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TAOS NM
— 575-742 4XXX5XXX6XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9636 CLOVIS NM
— 575-743 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 TRUTHCQNCS NM
— 575-744 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 TRUTHCQNCS NM
— 575-745 8XXX which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 LOVING NM
— 575-746 none assigned yet which blocks → QWEST CORPORATION 9636 ARTESIA NM
— 575-747 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF NEW MEXICO, LLC - NM 377H SOCORRO NM
— 575-748 none assigned yet which blocks → QWEST CORPORATION 9636 ARTESIA NM
— 575-749 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 CLOVIS NM
— 575-751 none assigned yet which blocks → QWEST CORPORATION 9636 TAOS NM
— 575-752 not yet reported which blocks → LEACO RURAL TEL. COOP., INC. 2264 HAGERMAN NM
— 575-754 0XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 RED RIVER NM
— 575-755 not yet reported which blocks → PLATEAU TELECOMMUNICATIONS, INC. - NM 777B ROSWELL NM
— 575-756 3XXX which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 CHAMA NM
— 575-758 not yet reported which blocks → QWEST CORPORATION 9636 TAOS NM
— 575-759 none assigned yet which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 DULCE NM
— 575-760 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLOVIS NM
— 575-762 not yet reported which blocks → QWEST CORPORATION 9636 CLOVIS NM
— 575-763 not yet reported which blocks → QWEST CORPORATION 9636 CLOVIS NM
— 575-769 not yet reported which blocks → QWEST CORPORATION 9636 CLOVIS NM
— 575-770 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 TAOS NM
— 575-772 6XXX which blocks → WESTERN NEW MEXICO TEL. CO., INC. 2268 DATIL NM
— 575-773 not yet reported which blocks → WESTERN NEW MEXICO TEL. CO., INC. 2268 QUEMADO NM
— 575-774 none assigned yet which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 LINDRITH NM
— 575-776 4XXX6XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 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
— 575-784 not yet reported which blocks → QWEST CORPORATION 9636 CANNON AFB NM
— 575-785 none assigned yet which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 CRLSBACRNS NM
— 575-791 0XXX1XXX3XXX5XXX7XXX8XXX9XXX which blocks → QWEST CORPORATION 9636 CLOVIS 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.