Recent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2020-05-20 | 223-500 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | JEFFERSON | PA |
| 2020-05-20 | 223-600 | 0XXX1XXX4XXX5XXX6XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | LIVERPOOL | PA |
| 2020-05-20 | 223-766 | 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | MERCERSBG | PA |
| 2020-05-20 | 234-274 | 0–9 XXXall 10 · 3 holders which blocks → | CSC WIRELESS, LLC | 425J | AKRON | OH |
| 2020-05-20 | 343-891 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Casselman | — |
| 2020-05-20 | 365-896 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Brooklin | — |
| 2020-05-20 | 365-897 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Orono | — |
| 2020-05-20 | 365-907 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Fisherville | — |
| 2020-05-20 | 365-908 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Selkirk | — |
| 2020-05-20 | 531-241 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - NE | 7144 | OMAHA | NE |
| 2020-05-20 | 548-875 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Leamington | — |
| 2020-05-20 | 548-876 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Tecumseh | — |
| 2020-05-20 | 567-304 | 0–9 XXXall 10 · 6 holders which blocks → | CSC WIRELESS, LLC | 425J | TOLEDO | OH |
| 2020-05-20 | 567-306 | 0–9 XXXall 10 · 2 holders which blocks → | CSC WIRELESS, LLC | 425J | MANSFIELD | OH |
| 2020-05-20 | 580-844 | 0XXX5XXX8XXX9XXX · 2 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | HITCHCOCK | OK |
| 2020-05-20 | 682-900 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | FORT WORTH | TX |
| 2020-05-20 | 731-877 | 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | GLEASON | TN |
| 2020-05-20 | 743-209 | 0–9 XXXall 10 · 4 holders which blocks → | CSC WIRELESS, LLC | 425J | GREENSBORO | NC |
| 2020-05-20 | 828-220 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | ASHEVILLE | NC |
| 2020-05-20 | 865-855 | 0–9 XXXall 10 · 4 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | CLINTON | TN |
| 2020-05-20 | 910-756 | 0–9 XXXall 10 · 3 holders which blocks → | CSC WIRELESS, LLC | 425J | WILMINGTON | NC |
| 2020-05-20 | 910-806 | 0–9 XXXall 10 · 7 holders which blocks → | CSC WIRELESS, LLC | 425J | FAYETTEVL | NC |
| 2020-05-20 | 937-784 | 0–9 XXXall 10 · 2 holders which blocks → | CSC WIRELESS, LLC | 425J | DAYTON | OH |
| 2020-05-20 | 954-751 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | POMPANOBCH | FL |
| 2020-05-20 | 980-316 | 0–9 XXXall 10 · 5 holders which blocks → | CSC WIRELESS, LLC | 425J | CHARLOTTE | NC |
| 2020-05-19 | 202-451 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN1 | DC |
| 2020-05-19 | 249-897 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chapleau | — |
| 2020-05-19 | 249-898 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Spanish | — |
| 2020-05-19 | 343-890 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Almonte | — |
| 2020-05-19 | 438-475 | not yet reported which blocks → | Bell Mobility | 6574 | Montreal | — |
| 2020-05-19 | 469-830 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | LEWISVILLE | TX |
| 2020-05-19 | 479-386 | 0XXX1XXX6XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | DECATUR | AR |
| 2020-05-19 | 548-722 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Waterford | — |
| 2020-05-19 | 548-878 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wallaceburg | — |
| 2020-05-19 | 561-492 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL | 6502 | BOCA RATON | FL |
| 2020-05-19 | 661-499 | 0–9 XXXall 10 · 4 holders which blocks → | AIRESPRING, INC. | 996H | LANCASTER | CA |
| 2020-05-19 | 669-301 | 0–9 XXXall 10 · 6 holders which blocks → | VONAGE AMERICA LLC | 197D | SNJS SOUTH | CA |
| 2020-05-19 | 747-293 | 0–9 XXXall 10 · 5 holders which blocks → | VONAGE AMERICA LLC | 197D | CANOGAPARK | CA |
| 2020-05-19 | 929-545 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NWYRCYZN07 | NY |
| 2020-05-19 | 949-210 | 0–9 XXXall 10 · 2 holders which blocks → | VONAGE AMERICA LLC | 197D | SADLBK VLY | CA |
| 2020-05-18 | 208-370 | 0–9 XXXall 10 · 6 holders which blocks → | CTC TELECOM, INC. | 4032 | BOISE | ID |
| 2020-05-18 | 272-243 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | ORWIGSBURG | PA |
| 2020-05-18 | 480-691 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2020-05-18 | 540-730 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELNYX LLC | 073H | KEEZLETOWN | VA |
| 2020-05-18 | 571-517 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - VA | 138E | DULLES | VA |
| 2020-05-18 | 763-330 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MN | 980E | TWINCITIES | MN |
| 2020-05-18 | 785-306 | 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS | 6532 | ST FRANCIS | KS |
| 2020-05-18 | 810-246 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LAPEER | MI |
| 2020-05-18 | 872-264 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN01 | IL |
| 2020-05-18 | 910-761 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NC | 998E | WRGHTSVBCH | NC |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.