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 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
2008-01-15 801-657 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2007-12-28 801-285 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 MIDVALE UT
2007-12-17 801-709 0–9 XXXall 10 · 5 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2007-10-25 801-425 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2007-10-23 801-448 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2007-09-25 801-719 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2007-09-18 801-707 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2007-08-23 801-696 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2007-08-15 801-995 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2007-08-13 801-803 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2007-07-18 801-513 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2007-06-27 801-708 0–9 XXXall 10 · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
2007-06-25 801-512 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-06-20 801-505 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
2007-06-18 801-503 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
2007-05-01 801-738 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2007-04-27 801-793 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-04-18 801-727 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 MIDVALE UT
2007-04-09 801-615 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2007-03-15 801-822 0–9 XXXall 10 · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 PROVO UT
2007-03-15 801-931 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
2007-02-27 801-833 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-26 801-669 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2006-12-13 801-341 0–9 XXXall 10 · 6 holders which blocks → QWEST CORPORATION 9636 LEHI UT
2006-12-12 801-664 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2006-11-22 801-610 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AMERCNFORK UT
2006-11-14 801-210 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E SPANIHFORK UT
2006-11-14 801-609 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E PAYSON UT
2006-11-14 801-923 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E FARMINGTON UT
2006-09-19 801-616 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2006-09-19 801-928 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2006-07-07 801-753 0–9 XXXall 10 · 7 holders which blocks → QWEST CORPORATION 9636 LEHI UT
2006-06-21 801-878 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 MIDVALE UT
2006-04-13 801-691 0–9 XXXall 10 · 5 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2006-04-12 801-678 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2006-03-30 801-662 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2006-01-20 801-692 0–9 XXXall 10 · 7 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 AMERCNFORK UT
2006-01-19 801-701 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PLEASATGRV UT
2005-10-13 801-658 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PAYSON UT
2005-10-11 801-704 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPRINGVL UT
2005-05-24 801-827 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9636 OGDEN UT
2005-03-31 801-769 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLEASATGRV UT
2005-03-24 801-660 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KAYSVILLE UT
2005-03-18 801-663 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2005-02-28 801-683 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 BOUNTIFUL UT
2005-01-05 801-349 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2004-12-22 801-653 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEHI UT
2004-12-16 801-682 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 KAYSVILLE UT
2004-11-23 801-419 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J SALT LAKE UT
2003-12-11 801-846 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 MIDVALE UT

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.