NumberResearchRecent prefix assignments
371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
New assignments by month
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 217-440 | UNITED STATES CELLULAR - IL | 6265 | QUINCY | IL | |
| 217-442 | ILLINOIS BELL TEL CO | 9329 | DANVILLE | IL | |
| 217-443 | ILLINOIS BELL TEL CO | 9329 | DANVILLE | IL | |
| 217-444 | ILLINOIS BELL TEL CO | 9329 | DANVILLE | IL | |
| 217-445 | FRONTIER NORTH, INC. - IL | 1015 | MDLTNNWHLD | IL | |
| 217-446 | ILLINOIS BELL TEL CO | 9329 | DANVILLE | IL | |
| 217-447 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | BEASON | IL | |
| 217-448 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | NIOTA | IL | |
| 217-449 | MCDONOUGH TEL. COOP. | 1047 | LOMAX | IL | |
| 217-450 | ILLINOIS BELL TEL CO | 9329 | DECATUR | IL | |
| 217-451 | ILLINOIS BELL TEL CO | 9329 | DECATUR | IL | |
| 217-452 | CASS TELEPHONE COMPANY | 0984 | VIRGINIA | IL | |
| 217-453 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | NAUVOO | IL | |
| 217-454 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DECATUR | IL | |
| 217-455 | ADAMS TEL. COOP. | 0976 | COATSBURG | IL | |
| 217-456 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | NEWDOUGLAS | IL | |
| 217-457 | FRONTIER COMMUNICATIONS-MIDLAND, INC. | 1055 | CONCORD | IL | |
| 217-458 | CASS TELEPHONE COMPANY | 0984 | CHANDLERVL | IL | |
| 217-459 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | WINDSOR | IL | |
| 217-460 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | MATTOON | IL | |
| 217-461 | ONVOY, LLC | 224C | JACKSONVL | IL | |
| 217-462 | ILLINOIS BELL TEL CO | 9329 | DECATUR | IL | |
| 217-463 | FRONTIER NORTH, INC. - IL | 1015 | PARIS | IL | |
| 217-464 | ILLINOIS BELL TEL CO | 9329 | DECATUR | IL | |
| 217-465 | FRONTIER NORTH, INC. - IL | 1015 | PARIS | IL | |
| 217-466 | FRONTIER NORTH, INC. - IL | 1015 | PARIS | IL | |
| 217-467 | ILLINOIS BELL TEL CO | 9329 | SPRINGFLD | IL | |
| 217-468 | FRONTIER NORTH, INC. - IL | 1015 | OREANA | IL | |
| 217-469 | ILLINOIS BELL TEL CO | 9329 | ST JOSEPH | IL | |
| 217-470 | ILLINOIS BELL TEL CO | 9329 | SPRINGFLD | IL | |
| 217-472 | FRONTIER NORTH, INC. - IL | 1015 | CHAPIN | IL | |
| 217-473 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSONVL | IL | |
| 217-474 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | DANVILLE | IL | |
| 217-475 | ILLINOIS BELL TEL CO | 9329 | DECATUR | IL | |
| 217-476 | CASS TELEPHONE COMPANY | 0984 | ASHLAND | IL | |
| 217-477 | ILLINOIS BELL TEL CO | 9329 | DANVILLE | IL | |
| 217-478 | FRONTIER NORTH, INC. - IL | 1015 | ALEXANDER | IL | |
| 217-479 | FRONTIER NORTH, INC. - IL | 1015 | JACKSONVL | IL | |
| 217-480 | T-MOBILE USA, INC. | 6529 | CHAMPAURBN | IL | |
| 217-481 | T-MOBILE USA, INC. | 6529 | SPRINGFLD | IL | |
| 217-482 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | MASON CITY | IL | |
| 217-483 | FRONTIER NORTH, INC. - IL | 1015 | CHATHAM | IL | |
| 217-484 | FRONTIER COMMUNICATIONS-MIDLAND, INC. | 1055 | SCOTTVILLE | IL | |
| 217-485 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | TOLONO | IL | |
| 217-486 | FRONTIER NORTH, INC. - IL | 1015 | ILLIOPOLIS | IL | |
| 217-487 | ILLINOIS BELL TEL CO | 9329 | CANTRALL | IL | |
| 217-488 | FRONTIER NORTH, INC. - IL | 1015 | NEW BERLIN | IL | |
| 217-489 | FRONTIER NORTH, INC. - IL | 1015 | MANSFIELD | IL | |
| 217-490 | UNITED STATES CELLULAR - IL | 6265 | JACKSONVL | IL | |
| 217-491 | UNITED STATES CELLULAR - IL | 6265 | JACKSONVL | IL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.