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 443
PAETEC ITEL, LLC 153
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
— 443-574 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J ELLICOTTCY MD
— 443-577 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J GLENBURNIE MD
— 443-579 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J ESSEX MD
— 443-582 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CHURCHVL MD
— 443-583 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J COLUMBIA MD
— 443-584 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J CROFTON MD
— 443-585 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J DARLINGTON MD
— 443-587 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J EDGEWOOD MD
— 443-589 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J COCKEYSVL MD
— 443-593 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ELKTON MD
— 443-601 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J FALLSTON MD
— 443-603 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J ANNAPOLIS MD
— 443-605 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WESTMINSTR MD
— 443-606 0XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FORK MD
— 443-607 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J WEST RIVER MD
— 443-609 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SYKESVILLE MD
— 443-616 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BEL AIR MD
— 443-632 4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J TOWSON MD
— 443-639 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J HAMPSTEAD MD
— 443-644 2XXX3XXX4XXX6XXX7XXX which blocks → PAETEC ITEL, LLC 829J JARRETTSVL MD
— 443-645 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J MILLERSVL MD
— 443-646 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORTHBEACH MD
— 443-647 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NEWWINDSOR MD
— 443-661 2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WATERLO238 MD
— 443-664 2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J OCEAN CITY MD
— 443-669 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DELMAR MD
— 443-675 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J RANDALLSTN MD
— 443-685 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SEVERN MD
— 443-706 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CRISFIELD MD
— 443-709 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ARBUTUS MD
— 443-712 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J REISTERSTN MD
— 443-715 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NORTH EAST MD
— 443-716 3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ANNAPOLIS MD
— 443-719 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J JARRETTSVL MD
— 443-724 7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J EASTON MD
— 443-725 4XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PARKVILLE MD
— 443-727 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BISHOPVL MD
— 443-728 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BERLIN MD
— 443-729 3XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WOODLAWN MD
— 443-730 3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ESSEX MD
— 443-737 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WATERLO238 MD
— 443-738 4XXX5XXX6XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PIKESVILLE MD
— 443-749 3XXX6XXX which blocks → PAETEC ITEL, LLC 829J GLENBURNIE MD
— 443-787 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BEL AIR MD
— 443-820 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ELKRIDGE MD
— 443-833 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J ARBUTUS MD
— 443-867 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J GLENBURNIE MD
— 443-872 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BALTIMORE MD
— 443-874 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BALTIMORE MD
— 443-884 2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BALTIMORE MD

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.