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 251
PAETEC ITEL, LLC 19
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
2022-03-28 251-386 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
2012-02-21 251-206 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
2008-09-26 251-273 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J CITRONELLE AL
2006-06-21 251-622 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
2001-02-26 251-706 7XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
— 251-210 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J FAIRHOPE AL
— 251-212 not yet reported which blocks → PAETEC ITEL, LLC 829J BREWTON AL
— 251-218 not yet reported which blocks → PAETEC ITEL, LLC 829J MCINTOSH AL
— 251-226 not yet reported which blocks → PAETEC ITEL, LLC 829J EVERGREEN AL
— 251-231 8XXX9XXX which blocks → PAETEC ITEL, LLC 829J JACKSON AL
— 251-237 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J FLOMATON AL
— 251-239 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BAYMINETTE AL
— 251-245 8XXX which blocks → PAETEC ITEL, LLC 829J BELLEFONTN AL
— 251-249 8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CITRONELLE AL
— 251-268 8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J MT VERNON AL
— 251-338 7XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
— 251-378 1XXX2XXX5XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
— 251-544 not yet reported which blocks → PAETEC ITEL, LLC 829J MOBILE AL
— 251-586 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL

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.