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 662
LEVEL 3 COMMUNICATIONS, LLC - MS 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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-11-18 662-853 4XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SMITHVILLE MS
2021-02-12 662-431 0XXX1XXX4XXX5XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GUNTOWN MS
2020-11-24 662-405 0XXX3XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MANTACHIE MS
2020-11-24 662-409 0XXX1XXX2XXX3XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 FULTON MS
2020-11-24 662-421 0XXX4XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 TREMONT MS
2006-01-19 662-913 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MEMPHIS MS
2006-01-16 662-985 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MEMPHIS MS
2005-06-10 662-733 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 DUNCAN MS
2004-11-02 662-886 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GREENWOOD MS
2004-10-25 662-727 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BENOIT MS
2004-10-25 662-762 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MOORHEAD MS
2004-10-25 662-771 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 LELAND MS
2004-10-25 662-799 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 FRIARS PT MS
2004-10-25 662-807 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HOLLANDALE MS
2004-10-25 662-810 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 VERONA MS
2004-10-25 662-830 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 INVERNESS MS
2004-10-25 662-947 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 ITTA BENA MS
2004-10-25 662-989 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CARROLLTON MS
2004-10-22 662-276 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OKOLONA MS
2004-10-22 662-591 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NETTLETON MS
2004-10-22 662-601 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BALDWYN MS
2004-10-22 662-729 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBSAFB MS
2004-10-22 662-855 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CALEDONIA MS
2004-10-22 662-995 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SHANNON MS
2004-04-07 662-388 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MARKS MS
2002-09-12 662-576 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 RIPLEY MS
2002-09-12 662-586 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PONTOTOC MS
2002-09-12 662-593 3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 IUKA MS
2002-09-12 662-594 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CORINTH MS
2002-09-12 662-596 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BOONEVILLE MS
2002-09-12 662-597 1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 AMORY MS
2002-09-12 662-598 1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NEW ALBANY MS
2002-07-16 662-298 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HERNANDO MS
2002-07-16 662-550 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OXFORD MS
2002-07-16 662-570 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBUS MS
2002-07-16 662-580 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GREENVILLE MS
2002-07-16 662-592 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CLARKSDALE MS
2002-07-16 662-595 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GREENWOOD MS
2002-05-07 662-638 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OXFORD MS
2002-05-07 662-644 2XXX5XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GREENWOOD MS
2002-05-07 662-743 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GREENVILLE MS
2002-05-07 662-798 1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBUS MS
2002-04-29 662-655 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MEMPHIS MS
2002-04-25 662-504 1XXX3XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HOLLY SPG MS
2002-04-25 662-507 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NEW ALBANY MS
2002-04-25 662-545 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CLEVELAND MS
2002-04-25 662-546 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 STARKVILLE MS
2002-04-25 662-553 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 TUPELO MS
2002-04-25 662-554 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BOONEVILLE MS
2002-04-25 662-567 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HOUSTON MS

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.