NumberResearchRecent prefix assignments
1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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, last 30 days — NPA 660
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2026-08-27 | 660-302 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | GRAHAM | MO |
| 2026-05-06 | 660-294 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BEVIER | MO |
| 2014-05-30 | 660-478 | 1XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | EAGLEVILLE | MO |
| 2004-12-30 | 660-242 | 2XXX5XXX6XXX7XXX8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MONTROSE | MO |
| 2004-12-30 | 660-279 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BLACKBURN | MO |
| 2004-12-30 | 660-283 | 0XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BLAIRSTOWN | MO |
| 2004-12-30 | 660-319 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MALTA BEND | MO |
| 2004-12-30 | 660-333 | 0XXX3XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | OTTERVILLE | MO |
| 2004-12-30 | 660-431 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SMITHTON | MO |
| 2004-12-30 | 660-474 | 0XXX1XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LEETON | MO |
| 2004-12-30 | 660-515 | 0XXX1XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SWEET SPG | MO |
| 2004-12-30 | 660-552 | 0XXX5XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | KING CITY | MO |
| 2004-12-30 | 660-616 | 0XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | TIPTON | MO |
| 2004-12-30 | 660-655 | 1XXX5XXX6XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | HOUSTONIA | MO |
| 2004-12-30 | 660-722 | 0XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | URICH | MO |
| 2004-12-30 | 660-797 | 0XXX7XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | GREENRIDGE | MO |
| 2004-12-30 | 660-847 | 6XXX7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CALHOUN | MO |
| 2004-12-30 | 660-889 | 9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | DEEPWATER | MO |
| 2004-12-30 | 660-906 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SYRACUSE | MO |
| 2004-12-30 | 660-952 | 1XXX5XXX6XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CHILHOWEE | MO |
| 2004-05-17 | 660-992 | 2XXX3XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BLACKBURN | MO |
| 2004-05-13 | 660-274 | 1XXX7XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | KING CITY | MO |
| 2004-04-06 | 660-252 | 1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | TIPTON | MO |
| 2003-11-07 | 660-243 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | WAVERLY | MO |
| 2003-11-07 | 660-246 | 0XXX1XXX2XXX6XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | HARDIN | MO |
| 2003-11-04 | 660-204 | 1XXX2XXX4XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SMITHTON | MO |
| 2003-11-04 | 660-205 | 1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SWEET SPG | MO |
| 2003-11-04 | 660-206 | 1XXX2XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | OTTERVILLE | MO |
| 2003-11-04 | 660-207 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | APPLETONCY | MO |
| 2003-11-04 | 660-208 | 0XXX1XXX2XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BLAIRSTOWN | MO |
| 2003-11-04 | 660-209 | 1XXX2XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | GREENRIDGE | MO |
| 2003-11-04 | 660-210 | 1XXX2XXX4XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | URICH | MO |
| 2003-11-04 | 660-212 | 1XXX2XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LEETON | MO |
| 2003-11-04 | 660-218 | 0XXX1XXX2XXX3XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CHILHOWEE | MO |
| 2003-11-04 | 660-219 | 1XXX7XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | HOUSTONIA | MO |
| 2003-11-04 | 660-220 | 1XXX2XXX3XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MALTA BEND | MO |
| 2003-11-04 | 660-228 | 1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MONTROSE | MO |
| 2003-11-04 | 660-230 | 1XXX2XXX3XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CALHOUN | MO |
| 2003-11-04 | 660-231 | 1XXX4XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | DEEPWATER | MO |
| 2002-08-20 | 660-225 | 1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CENTERVIEW | MO |
| 2002-08-09 | 660-250 | 1XXX2XXX4XXX6XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | NORBORNE | MO |
| 2002-08-09 | 660-251 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LEXINGTON | MO |
| 2002-07-15 | 660-833 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MOBERLY | MO |
| 2002-03-28 | 660-672 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BOONVILLE | MO |
| 2002-03-28 | 660-675 | 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BROOKFIELD | MO |
| 2002-03-28 | 660-677 | 1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ARMSTRONG | MO |
| 2002-02-03 | 660-386 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BUTLER | MO |
| 2001-12-12 | 660-223 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | WARSAW | MO |
| 2001-12-12 | 660-383 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CLINTON | MO |
| 2001-05-10 | 660-240 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CHILLICOTH | MO |
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.