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 508
PAETEC ITEL, LLC 67
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
2003-11-12 508-499 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J OXFORD MA
2003-06-19 508-506 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J OXFORD MA
2002-07-03 508-659 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J BRIDGEWTR MA
2001-03-06 508-372 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J WHITINSVL MA
2001-02-16 508-656 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J FRAMINGHAM MA
2001-02-16 508-683 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MARLBORO MA
— 508-205 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J EASTON MA
— 508-258 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → PAETEC ITEL, LLC 829J DENNIS MA
— 508-281 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MARLBORO MA
— 508-296 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CATAUMET MA
— 508-298 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J FRANKLIN MA
— 508-319 1XXX9XXX which blocks → PAETEC ITEL, LLC 829J NATICK MA
— 508-342 5XXX8XXX which blocks → PAETEC ITEL, LLC 829J ATTLEBORO MA
— 508-356 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CATAUMET MA
— 508-373 2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-402 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FALL RIVER MA
— 508-407 5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J AUBURN MA
— 508-418 1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HYANNIS MA
— 508-436 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BROCKTON MA
— 508-438 not yet reported which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-452 2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MANSFIELD MA
— 508-453 not yet reported which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-459 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-469 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J CHATHAM MA
— 508-471 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-474 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HOLLISTON MA
— 508-488 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J MILFORD MA
— 508-514 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J WELLFLEET MA
— 508-521 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J BROCKTON MA
— 508-531 not yet reported which blocks → PAETEC ITEL, LLC 829J BRIDGEWTR MA
— 508-532 not yet reported which blocks → PAETEC ITEL, LLC 829J FRAMINGHAM MA
— 508-535 5XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J EASTON MA
— 508-538 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J MARION MA
— 508-552 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-568 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J HYANNIS MA
— 508-623 5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J FOXBORO MA
— 508-638 8XXX which blocks → PAETEC ITEL, LLC 829J BROCKTON MA
— 508-639 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SOUTHGATE MA
— 508-640 5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WEBSTER MA
— 508-665 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FRAMINGHAM MA
— 508-684 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J VINEYRDHVN MA
— 508-717 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWBEDFORD MA
— 508-719 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SHREWSBURY MA
— 508-720 2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NATICK MA
— 508-742 5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J NEWBEDFORD MA
— 508-749 not yet reported which blocks → PAETEC ITEL, LLC 829J WORCESTER MA
— 508-768 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WESTBORO MA
— 508-772 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FOXBORO MA
— 508-784 1XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CHARLTON MA
— 508-802 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J TAUNTON MA

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.