NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 828
FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 39
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
2018-11-06 828-370 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SYLVA NC
2005-07-07 828-554 0–9 XXXall 10 · 7 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 CHEROKEE NC
2004-11-22 828-587 2XXX which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SYLVA NC
— 828-293 4XXX6XXX8XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 CULLOWHEE NC
— 828-321 6XXX7XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 ANDREWS NC
— 828-349 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 FRANKLIN NC
— 828-369 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 FRANKLIN NC
— 828-389 5XXX7XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 HAYESVILLE NC
— 828-479 0XXX5XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 ROBBINSVL NC
— 828-488 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 BRYSONCITY NC
— 828-497 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 CHEROKEE NC
— 828-498 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 FONTANAVLG NC
— 828-524 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 FRANKLIN NC
— 828-526 6XXX7XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 HIGHLANDS NC
— 828-586 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SYLVA NC
— 828-622 0XXX1XXX2XXX4XXX5XXX6XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 HOTSPRINGS NC
— 828-631 7XXX which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SYLVA NC
— 828-644 2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SUIT NC
— 828-645 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 WEAVERVL NC
— 828-649 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MARSHALL NC
— 828-652 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MARION NC
— 828-655 5XXX6XXX7XXX9XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MARION NC
— 828-656 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 GUNTERTOWN NC
— 828-658 5XXX7XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 WEAVERVL NC
— 828-659 none assigned yet which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MARION NC
— 828-668 2XXX5XXX6XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 OLD FORT NC
— 828-675 2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MICAVILLE NC
— 828-678 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 BURNSVILLE NC
— 828-680 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MARS HILL NC
— 828-682 8XXX which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 BURNSVILLE NC
— 828-688 0XXX7XXX8XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 BAKERSVL NC
— 828-689 0XXX which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MARS HILL NC
— 828-724 5XXX6XXX7XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 GARDENCITY NC
— 828-738 1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 GLENWDPDNC NC
— 828-743 8XXX which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 CASHIERS NC
— 828-756 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SEVIER NC
— 828-787 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 HIGHLANDS NC
— 828-835 0XXX1XXX2XXX5XXX6XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MURPHY NC
— 828-837 not yet reported which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 MURPHY NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.