NumberResearchRecent prefix assignments
360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2013-08-16 | 249-266 | not yet reported which blocks → | Comwave Networks | 160G | Sudbury | — |
| 2013-08-16 | 249-267 | not yet reported which blocks → | Comwave Networks | 160G | Warren | — |
| 2013-08-16 | 249-268 | not yet reported which blocks → | Comwave Networks | 160G | Wawa | — |
| 2013-08-16 | 249-269 | not yet reported which blocks → | Comwave Networks | 160G | Whitefish Falls | — |
| 2013-08-16 | 667-803 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MD | 071F | SOLOMONS | MD |
| 2013-08-16 | 708-858 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | LANSING | IL |
| 2013-08-16 | 779-803 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | NEW LENOX | IL |
| 2013-08-16 | 812-814 | 0–9 XXXall 10 · 4 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | TERREHAUTE | IN |
| 2013-08-16 | 912-251 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - GA | 6116 | SAVANNAH | GA |
| 2013-08-16 | 951-386 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | WOODCREST | CA |
| 2013-08-15 | 289-601 | not yet reported which blocks → | Comwave Networks | 160G | Fisherville | — |
| 2013-08-15 | 289-602 | not yet reported which blocks → | Comwave Networks | 160G | Beamsville | — |
| 2013-08-15 | 289-603 | not yet reported which blocks → | Comwave Networks | 160G | Cayuga | — |
| 2013-08-15 | 289-604 | not yet reported which blocks → | Comwave Networks | 160G | Dunnville | — |
| 2013-08-15 | 289-605 | not yet reported which blocks → | Comwave Networks | 160G | Vineland | — |
| 2013-08-15 | 289-606 | not yet reported which blocks → | Comwave Networks | 160G | St. Catharines-Thorold | — |
| 2013-08-15 | 289-607 | not yet reported which blocks → | Comwave Networks | 160G | Wellandport | — |
| 2013-08-15 | 331-305 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2013-08-15 | 480-351 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2013-08-15 | 705-600 | not yet reported which blocks → | Comwave Networks | 160G | Chapleau | — |
| 2013-08-15 | 705-601 | not yet reported which blocks → | Comwave Networks | 160G | Espanola | — |
| 2013-08-15 | 705-602 | not yet reported which blocks → | Comwave Networks | 160G | Gogama | — |
| 2013-08-15 | 705-603 | not yet reported which blocks → | Comwave Networks | 160G | Little Current | — |
| 2013-08-15 | 705-604 | not yet reported which blocks → | Comwave Networks | 160G | Massey | — |
| 2013-08-15 | 705-605 | not yet reported which blocks → | Comwave Networks | 160G | Noelville | — |
| 2013-08-14 | 210-529 | 0–9 XXXall 10 · 3 holders which blocks → | FOREMOST TELECOMMUNICATIONS CORPORATION - TX | 319D | SANANTONIO | TX |
| 2013-08-14 | 254-312 | 0–9 XXXall 10 · 4 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | KILLEEN | TX |
| 2013-08-14 | 262-765 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | WAUKESHA | WI |
| 2013-08-14 | 579-737 | not yet reported which blocks → | Comwave Networks | 160G | St-Cesaire | — |
| 2013-08-14 | 579-738 | not yet reported which blocks → | Comwave Networks | 160G | Dunham | — |
| 2013-08-14 | 579-739 | not yet reported which blocks → | Comwave Networks | 160G | Eastman | — |
| 2013-08-14 | 579-786 | not yet reported which blocks → | Comwave Networks | 160G | Knowlton | — |
| 2013-08-14 | 579-787 | not yet reported which blocks → | Comwave Networks | 160G | Granby | — |
| 2013-08-14 | 579-788 | not yet reported which blocks → | Comwave Networks | 160G | Mansonville | — |
| 2013-08-14 | 579-789 | not yet reported which blocks → | Comwave Networks | 160G | Sutton | — |
| 2013-08-14 | 579-797 | not yet reported which blocks → | Comwave Networks | 160G | Waterloo | — |
| 2013-08-14 | 586-249 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2013-08-14 | 586-388 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2013-08-14 | 601-203 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | JACKSON | MS |
| 2013-08-14 | 647-714 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Toronto | — |
| 2013-08-14 | 813-518 | 0–9 XXXall 10 · 6 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | TAMPACEN | FL |
| 2013-08-14 | 832-639 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | TOMBALL | TX |
| 2013-08-14 | 873-267 | not yet reported which blocks → | Comwave Networks | 160G | Deschaillons | — |
| 2013-08-14 | 873-268 | not yet reported which blocks → | Comwave Networks | 160G | Maskinonge | — |
| 2013-08-14 | 873-269 | not yet reported which blocks → | Comwave Networks | 160G | Trois-Rivieres | — |
| 2013-08-14 | 918-400 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | ONVOY, LLC - OK | 409F | FORTGIBSON | OK |
| 2013-08-13 | 204-583 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2013-08-13 | 229-779 | not yet reported which blocks → | CITY OF THOMASVILLE | 6145 | NORMANPARK | GA |
| 2013-08-13 | 334-597 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AL | 5255 | MCKENZIE | AL |
| 2013-08-13 | 334-908 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AL | 5255 | COLUMBIA | AL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.