NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 801
QWEST CORPORATION 327
T-MOBILE USA, INC. 91
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 69
NEW CINGULAR WIRELESS PCS, LLC 62
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 50
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
— 801-209 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX UT
— 801-212 9XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-213 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-215 9XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-216 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 AMERCNFORK UT
— 801-217 2XXX3XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 CLEARFIELD UT
— 801-218 2XXX3XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 FARMINGTON UT
— 801-219 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
— 801-220 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-221 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-222 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-223 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-224 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-225 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-226 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-227 4XXX9XXX which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-228 0XXX1XXX2XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-229 8XXX which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-230 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-231 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-232 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-233 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-234 0XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-235 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-236 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-237 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-238 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-239 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-240 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-243 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-244 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-245 0XXX9XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-246 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-250 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-251 0XXX1XXX6XXX7XXX · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
— 801-252 4XXX5XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-253 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-254 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-255 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-256 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-257 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-258 1XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-259 4XXX which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-260 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-261 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-262 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-263 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-264 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-265 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.