NumberResearchRecent prefix assignments
349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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
New assignments by month
Sep 2026
Aug 2026
Jul 2026
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May 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2011-09-13 | 424-280 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNMN SNMN | CA |
| 2011-09-13 | 450-408 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Damase | — |
| 2011-09-13 | 450-410 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Hugues | — |
| 2011-09-13 | 450-418 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Hyacinthe | — |
| 2011-09-13 | 450-423 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Jude | — |
| 2011-09-13 | 450-425 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Pie | — |
| 2011-09-13 | 450-426 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Simon | — |
| 2011-09-13 | 450-440 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Thomas-d'Aquin | — |
| 2011-09-13 | 450-480 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Ste-Helene-de-Bagot | — |
| 2011-09-13 | 450-496 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Ste-Madeleine | — |
| 2011-09-13 | 513-882 | 0–9 XXXall 10 · 4 holders which blocks → | CITYNET OHIO, LLC - OH | 036B | CINCINNATI | OH |
| 2011-09-13 | 516-418 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NASSAUZN05 | NY |
| 2011-09-13 | 581-245 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sacre-Coeur | — |
| 2011-09-13 | 581-255 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sault-au-Mouton | — |
| 2011-09-13 | 581-256 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Fidele | — |
| 2011-09-13 | 581-257 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Hilarion | — |
| 2011-09-13 | 581-258 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Irenee | — |
| 2011-09-13 | 581-259 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Urbain | — |
| 2011-09-13 | 581-260 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Ste-Anne-de-Portneuf | — |
| 2011-09-13 | 581-263 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Tadoussac | — |
| 2011-09-13 | 581-264 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Simeon | — |
| 2011-09-13 | 602-733 | 0–9 XXXall 10 · 3 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | PHOENIX | AZ |
| 2011-09-13 | 609-256 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | TRENTON | NJ |
| 2011-09-13 | 615-651 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NASHVILLE | TN |
| 2011-09-13 | 626-632 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ALHAMBRA | CA |
| 2011-09-13 | 631-461 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | RIVERHEAD | NY |
| 2011-09-13 | 650-258 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | PALO ALTO | CA |
| 2011-09-13 | 865-227 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | KNOXVILLE | TN |
| 2011-09-13 | 909-329 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FONTANA | CA |
| 2011-09-13 | 925-350 | 0–9 XXXall 10 · 8 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ANTIOCH | CA |
| 2011-09-13 | 925-357 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALNUT CRK | CA |
| 2011-09-13 | 949-236 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | IRVINE | CA |
| 2011-09-12 | 207-219 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | SCARBOROGH | ME |
| 2011-09-12 | 318-313 | 9XXX which blocks → | METROPCS, INC. | 5562 | SHREVEPORT | LA |
| 2011-09-12 | 361-233 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | NORDHEIM | TX |
| 2011-09-12 | 432-217 | 0–9 XXXall 10 · 2 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | MIDKIFF | TX |
| 2011-09-12 | 450-406 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Actonvale | — |
| 2011-09-12 | 571-392 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HERNDON | VA |
| 2011-09-12 | 580-952 | 0–9 XXXall 10 · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | HITCHCOCK | OK |
| 2011-09-12 | 581-236 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Baie-Ste-Catherine | — |
| 2011-09-12 | 581-237 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Baie-St-Paul | — |
| 2011-09-12 | 581-238 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Bergeronnes | — |
| 2011-09-12 | 581-239 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Clermont | — |
| 2011-09-12 | 581-240 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Ile-aux-Coudres | — |
| 2011-09-12 | 581-241 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | La Malbaie | — |
| 2011-09-12 | 581-242 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Les Eboulements | — |
| 2011-09-12 | 581-243 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Les Escoumins | — |
| 2011-09-12 | 581-244 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Petite-Riviere-St-Francois | — |
| 2011-09-12 | 713-360 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | HOUSTON | TX |
| 2011-09-12 | 806-302 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | HALECENTER | TX |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.