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 813
FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 233
AERIAL COMMUNICATIONS, INC. 96
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 73
METROPCS, INC. 53
NEW CINGULAR WIRELESS PCS, LLC - GA 47
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
2004-02-27 813-943 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPANTH FL
2004-02-27 813-944 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPASTH FL
2004-01-06 813-600 0–9 XXXall 10 · 3 holders which blocks → LINGO TELECOM, LLC 3840 TAMPACEN FL
2003-01-15 813-454 0–9 XXXall 10 · 2 holders which blocks → FUSION CLOUD SERVICES, LLC 018A TAMPA FL
2002-10-22 813-393 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2002-10-18 813-388 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPANTH FL
2002-10-16 813-486 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
2002-08-15 813-838 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 ZEPHYRHILS FL
2002-04-25 813-363 4XXX5XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2002-03-27 813-355 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
2002-03-13 813-346 not yet reported which blocks → PAETEC ITEL, LLC 829J TAMPANTH FL
2002-01-03 813-433 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPAWST FL
2002-01-03 813-434 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPASTH FL
2002-01-03 813-435 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPANTH FL
2002-01-03 813-436 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPAEST FL
2002-01-03 813-720 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 PLANT CITY FL
2002-01-02 813-731 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
2001-12-26 813-810 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-12-26 813-817 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-12-13 813-343 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2001-12-13 813-345 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AT&T - LOCAL 7421 TAMPANTH FL
2001-10-23 813-323 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPACEN FL
2001-10-23 813-708 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PLANT CITY FL
2001-09-28 813-793 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AT&T - LOCAL 7421 TAMPAEST FL
2001-09-20 813-313 0XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 TAMPACEN FL
2001-09-04 813-468 4XXX6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPACEN FL
2001-08-30 813-413 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J TAMPAEST FL
2001-08-29 813-448 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPAWST FL
2001-07-12 813-766 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-05-22 813-300 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-05-18 813-476 6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-17 813-846 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-05-03 813-205 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-220 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-230 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-240 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-334 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-335 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-340 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-382 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-390 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-503 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-505 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-713 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ZEPHYRHILS FL
2001-05-03 813-716 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PLANT CITY FL
2001-05-03 813-760 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-05-03 813-765 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
2001-03-30 813-389 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-03-12 813-477 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
2001-01-30 813-380 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL

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.