NumberResearchRecent prefix assignments
369 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
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
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 309-586 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | SEATON | IL | |
| 309-587 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | NEW BOSTON | IL | |
| 309-589 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-593 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | SHERRARD | IL | |
| 309-594 | FRONTIER NORTH, INC. - IL | 1015 | NEPONSET | IL | |
| 309-596 | VIOLA HOME TEL. CO. | 1087 | VIOLA | IL | |
| 309-597 | BRIGHTSPEED OF ILLINOIS, LLC | 1057 | FORESTCITY | IL | |
| 309-602 | ONVOY, LLC | 224C | SHERRARD | IL | |
| 309-611 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | IL | |
| 309-617 | ONVOY, LLC | 224C | DUNLAP | IL | |
| 309-621 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PEORIA | IL | |
| 309-623 | TWILIO INTERNATIONAL, INC. | 506J | MOLINE | IL | |
| 309-624 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-627 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | BIGGSVILLE | IL | |
| 309-629 | WOODHULL COMMUNITY TEL. CO. | 1091 | ALPHA | IL | |
| 309-631 | T-MOBILE USA, INC. | 6529 | ROCKISLAND | IL | |
| 309-633 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-634 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-635 | UNITED STATES CELLULAR - IL | 6265 | PEORIA | IL | |
| 309-636 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-637 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-639 | MID CENTURY TEL. COOP., INC. | 1054 | WILLIMSFLD | IL | |
| 309-642 | METROPCS, INC. | 5562 | PEKIN | IL | |
| 309-645 | UNITED STATES CELLULAR - IL | 6265 | PEORIA | IL | |
| 309-646 | SPOK, INC. | 6630 | PEORIA | IL | |
| 309-647 | ILLINOIS BELL TEL CO | 9329 | CANTON | IL | |
| 309-649 | ILLINOIS BELL TEL CO | 9329 | CANTON | IL | |
| 309-651 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | YATES CITY | IL | |
| 309-652 | MCDONOUGH TEL. COOP. | 1047 | BLANDINSVL | IL | |
| 309-653 | MCDONOUGH TEL. COOP. | 1047 | ADAIR | IL | |
| 309-654 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | CORDOVA | IL | |
| 309-655 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-657 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | PEORIA | IL | |
| 309-658 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | HILLSDALE | IL | |
| 309-659 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | ERIE | IL | |
| 309-660 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BLOOMINGTN | IL | |
| 309-661 | FRONTIER NORTH, INC. - IL | 1015 | BLOOMINGTN | IL | |
| 309-662 | FRONTIER NORTH, INC. - IL | 1015 | BLOOMINGTN | IL | |
| 309-663 | FRONTIER NORTH, INC. - IL | 1015 | BLOOMINGTN | IL | |
| 309-664 | FRONTIER NORTH, INC. - IL | 1015 | BLOOMINGTN | IL | |
| 309-665 | NUSO, LLC | 732J | BLOOMINGTN | IL | |
| 309-667 | NEW WINDSOR TEL. CO. | 1062 | NEWWINDSOR | IL | |
| 309-668 | ILLINOIS BELL TEL CO | 9329 | CANTON | IL | |
| 309-669 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-671 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-672 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-673 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-674 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-675 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL | |
| 309-676 | ILLINOIS BELL TEL CO | 9329 | PEORIA | IL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.