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
2024-02-14 801-385 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MURRAY UT
2023-05-22 801-435 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2023-05-17 801-801 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2022-05-11 801-630 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E BOUNTIFUL UT
2022-05-11 801-909 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H BOUNTIFUL UT
2022-04-25 801-247 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2013-02-27 801-666 0–9 XXXall 10 · 6 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2012-10-23 801-890 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2011-12-30 801-396 0–9 XXXall 10 · 4 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D SPRINGVL UT
2011-12-20 801-919 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2011-12-14 801-441 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2011-05-03 801-600 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
2011-05-03 801-800 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2011-02-22 801-900 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2011-01-31 801-970 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-01-27 801-980 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F AMERCNFORK UT
2011-01-19 801-500 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2010-12-23 801-875 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-12-23 801-960 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2010-12-23 801-989 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2010-12-21 801-888 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2010-12-08 801-384 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2010-06-15 801-200 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2010-06-03 801-871 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
2010-06-01 801-901 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2010-05-03 801-874 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2010-04-16 801-935 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2010-03-30 801-903 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-04 801-899 0–9 XXXall 10 · 5 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D PLEASATGRV UT
2010-02-23 801-882 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2010-02-11 801-893 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2010-01-12 801-946 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2010-01-04 801-895 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2009-08-11 801-810 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
2009-04-07 801-889 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2009-03-12 801-837 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2009-02-09 801-300 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2009-02-02 801-872 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F BOUNTIFUL UT
2008-12-10 801-826 0–9 XXXall 10 · 3 holders which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 MIDVALE UT
2008-11-13 801-857 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2008-10-08 801-839 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2008-10-02 801-214 0–9 XXXall 10 · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
2008-09-23 801-477 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 SPRINGVL UT
2008-09-12 801-854 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2008-07-21 801-834 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2008-06-24 801-702 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2008-05-14 801-410 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2008-03-26 801-819 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2008-02-26 801-432 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 MIDVALE UT
2008-02-07 801-850 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E PROVO 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.