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 253
QWEST CORPORATION 141
T-MOBILE USA, INC. 77
ONVOY, LLC - WA 49
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 48
NEW CINGULAR WIRELESS PCS, LLC 35
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
— 253-681 2XXX3XXX4XXX5XXX · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 DES MOINES WA
— 253-682 7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
— 253-683 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → RAINIER CONNECT, INC. - WA 7720 TACOMA WA
— 253-686 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-687 not yet reported which blocks → SPOK, INC. 6630 TACOMA WA
— 253-691 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-692 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-693 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → RAINIER CONNECT, INC. - WA 7720 PUYALLUP WA
— 253-697 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-700 not yet reported which blocks → WA
— 253-709 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
— 253-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 253-719 2XXX3XXX4XXX5XXX7XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 TACOMAWVLY WA
— 253-720 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-722 3XXX4XXX6XXX7XXX8XXX9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
— 253-732 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-733 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 DES MOINES WA
— 253-735 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-736 2XXX3XXX4XXX5XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 AUBURN WA
— 253-737 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 AUBURN WA
— 253-740 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
— 253-750 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J SUMNER WA
— 253-751 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-752 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-753 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-754 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TACOMAWVLY WA
— 253-756 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-759 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-761 6XXX which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-765 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 DES MOINES WA
— 253-766 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KENT WA
— 253-770 not yet reported which blocks → QWEST CORPORATION 9638 PUYALLUP WA
— 253-773 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KENT WA
— 253-777 2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
— 253-778 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
— 253-779 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-780 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - WA 483E GRAHAM WA
— 253-785 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E DES MOINES WA
— 253-792 0XXX1XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-793 not yet reported which blocks → ONVOY, LLC - WA 483E AUBURN WA
— 253-797 4XXX5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
— 253-798 not yet reported which blocks → QWEST CORPORATION 9638 TACOMA WA
— 253-799 not yet reported which blocks → ONVOY, LLC - WA 483E PUYALLUP WA
— 253-802 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
— 253-804 not yet reported which blocks → QWEST CORPORATION 9638 AUBURN WA
— 253-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 253-813 not yet reported which blocks → QWEST CORPORATION 9638 KENT WA
— 253-815 not yet reported which blocks → QWEST CORPORATION 9638 DES MOINES WA
— 253-820 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
— 253-826 not yet reported which blocks → QWEST CORPORATION 9638 SUMNER WA

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.