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 401
PAETEC ITEL, LLC 65
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
2012-08-21 401-483 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL RI
2012-04-18 401-606 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
2009-01-09 401-319 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J CENTREDALE RI
2008-07-17 401-415 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
2003-07-22 401-699 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
2002-08-20 401-230 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
2002-02-26 401-412 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J COVENTRY RI
2001-11-27 401-360 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J NARRAGNSTT RI
2001-10-08 401-304 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J W WARWICK RI
2001-10-08 401-330 0XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
2001-10-08 401-402 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J GREENWICH RI
2001-10-08 401-616 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PAWTUCKET RI
2001-03-28 401-694 8XXX which blocks → PAETEC ITEL, LLC 829J WARREN RI
— 401-217 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WGLOCESTER RI
— 401-218 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NARRAGNSTT RI
— 401-223 not yet reported which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-257 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CUMBLND HL RI
— 401-312 3XXX4XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PAWTUCKET RI
— 401-320 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J W WARWICK RI
— 401-324 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NEWPORT RI
— 401-352 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WARWICK RI
— 401-365 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PAWTUCKET RI
— 401-366 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PORTSMOUTH RI
— 401-367 3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J NEWPORT RI
— 401-375 1XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J TIVERTON RI
— 401-380 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NEWPORT RI
— 401-381 3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J W WARWICK RI
— 401-384 0XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WARWICK RI
— 401-387 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HOPEVALLEY RI
— 401-404 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CENTREDALE RI
— 401-410 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL RI
— 401-427 5XXX which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-471 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J GREENWICH RI
— 401-488 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J WOONSOCKET RI
— 401-490 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-495 4XXX5XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PAWTUCKET RI
— 401-515 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J NARRAGNSTT RI
— 401-519 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI
— 401-531 7XXX which blocks → PAETEC ITEL, LLC 829J WOONSOCKET RI
— 401-534 3XXX4XXX5XXX6XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WOONSOCKET RI
— 401-558 5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J GREENWICH RI
— 401-562 7XXX which blocks → PAETEC ITEL, LLC 829J WARWICK RI
— 401-583 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NO KINGSTN RI
— 401-586 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J W WARWICK RI
— 401-589 0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J W WARWICK RI
— 401-599 0XXX1XXX3XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J TIVERTON RI
— 401-604 8XXX which blocks → PAETEC ITEL, LLC 829J WESTERLY RI
— 401-608 0XXX4XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWPORT RI
— 401-628 4XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WARREN RI
— 401-633 2XXX4XXX5XXX which blocks → PAETEC ITEL, LLC 829J PROVIDENCE RI

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.