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
2003-10-28 801-454 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 MIDVALE UT
2003-10-28 801-460 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 MIDVALE UT
2003-10-28 801-665 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 SALT LAKE UT
2003-10-28 801-672 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 SALT LAKE UT
2003-10-28 801-757 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 SALT LAKE UT
2003-09-26 801-795 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 SALT LAKE UT
2002-11-14 801-830 not yet reported which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2002-01-29 801-869 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 SALT LAKE UT
2001-11-14 801-836 not yet reported which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2001-10-12 801-824 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-10-03 801-386 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2001-09-18 801-608 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2001-09-18 801-695 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2001-08-15 801-716 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MURRAY UT
2001-07-20 801-456 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 SALT LAKE UT
2001-07-17 801-577 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-07-17 801-628 not yet reported which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2001-07-12 801-863 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
2001-06-15 801-623 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2001-06-15 801-654 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-06-12 801-422 none assigned yet which blocks → QWEST CORPORATION 9636 PROVO UT
2001-05-14 801-637 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-05-14 801-638 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-05-09 801-202 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
2001-05-09 801-241 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
2001-05-09 801-242 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
2001-05-09 801-248 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
2001-05-09 801-249 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
2001-05-04 801-330 9XXX which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2001-04-19 801-430 8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 OGDEN UT
2001-04-19 801-647 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-04-19 801-855 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J AMERCNFORK UT
2001-04-17 801-643 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2001-04-17 801-712 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-03-16 801-279 not yet reported which blocks → SPOK, INC. 6630 KAYSVILLE UT
2001-03-16 801-283 not yet reported which blocks → SPOK, INC. 6630 PROVO UT
2001-03-16 801-686 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2001-03-16 801-687 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2001-03-16 801-688 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-01-17 801-307 6XXX8XXX which blocks → PAETEC ITEL, LLC 829J MIDVALE UT
2001-01-17 801-548 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2001-01-17 801-676 5XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
2001-01-17 801-677 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 BOUNTIFUL UT
— 801-201 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-203 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOUNTIFUL UT
— 801-204 9XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-205 none assigned yet which blocks → METROPCS, INC. 5562 SALT LAKE UT
— 801-206 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 ALTA UT
— 801-207 0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MURRAY UT
— 801-208 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 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.