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 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
— 813-471 5XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J TAMPA FL
— 813-472 8XXX which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPA FL
— 813-473 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 PLANT CITY FL
— 813-478 none assigned yet which blocks → METROPCS, INC. 5562 PLANT CITY FL
— 813-479 3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ZEPHYRHILS FL
— 813-482 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPANTH FL
— 813-483 9XXX which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-487 not yet reported which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPA FL
— 813-488 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J TAMPACEN FL
— 813-489 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J TAMPASTH FL
— 813-490 not yet reported which blocks → PAETEC ITEL, LLC 829J TAMPA FL
— 813-491 1XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J TAMPAWST FL
— 813-493 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
— 813-494 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
— 813-495 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
— 813-496 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-499 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPACEN FL
— 813-504 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
— 813-508 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPA FL
— 813-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 813-513 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C TAMPACEN FL
— 813-514 3XXX5XXX7XXX which blocks → PAETEC ITEL, LLC 829J TAMPACEN FL
— 813-515 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPACEN FL
— 813-526 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TAMPA FL
— 813-534 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C TAMPACEN FL
— 813-541 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
— 813-545 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
— 813-546 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPACEN FL
— 813-549 9XXX which blocks → PAETEC ITEL, LLC 829J TAMPACEN FL
— 813-552 not yet reported which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-554 not yet reported which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST FL
— 813-558 not yet reported which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-567 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 PLANT CITY FL
— 813-569 4XXX5XXX8XXX9XXX · 2 holders which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPA FL
— 813-571 4XXX6XXX · 2 holders which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPAEST FL
— 813-572 not yet reported which blocks → ABC PAGING CITY BEEPERS, INC. 6548 TAMPA FL
— 813-583 not yet reported which blocks → FL
— 813-584 not yet reported which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-589 not yet reported which blocks → FL
— 813-594 9XXX which blocks → PAETEC ITEL, LLC 829J TAMPA FL
— 813-597 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J TAMPA FL
— 813-598 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPA FL
— 813-601 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
— 813-602 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ZEPHYRHILS FL
— 813-604 not yet reported which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPACEN FL
— 813-610 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
— 813-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 813-612 not yet reported which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 TAMPACEN FL
— 813-613 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL

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.