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
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 217-635 | ILLINOIS BELL TEL CO | 9329 | OAKFORD | IL | |
| 217-636 | ILLINOIS BELL TEL CO | 9329 | ATHENS | IL | |
| 217-637 | T-MOBILE USA, INC. | 6529 | CHAMPAURBN | IL | |
| 217-638 | T-MOBILE USA, INC. | 6529 | SPRINGFLD | IL | |
| 217-639 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | CHARLESTON | IL | |
| 217-641 | PAETEC ITEL, LLC | 829J | QUINCY | IL | |
| 217-642 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | HARTSBURG | IL | |
| 217-643 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | THOMASBORO | IL | |
| 217-644 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | STRASBURG | IL | |
| 217-645 | ILLINOIS BELL TEL CO | 9329 | LIBERTY | IL | |
| 217-647 | ADAMS TEL. COOP. | 0976 | MEYER | IL | |
| 217-648 | FRONTIER NORTH, INC. - IL | 1015 | ATLANTA | IL | |
| 217-649 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHAMPAURBN | IL | |
| 217-650 | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ATLANTA | IL | |
| 217-652 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SPRINGFLD | IL | |
| 217-653 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | QUINCY | IL | |
| 217-654 | LAHARPE TEL. CO. | 1043 | FOUNTAGREN | IL | |
| 217-655 | TELNYX LLC | 073H | DANVILLE | IL | |
| 217-656 | ILLINOIS BELL TEL CO | 9329 | PAYSON | IL | |
| 217-658 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | SUTTER | IL | |
| 217-659 | LAHARPE TEL. CO. | 1043 | LA HARPE | IL | |
| 217-660 | COMCAST IP PHONE, LLC | 318J | ROCHESTER | IL | |
| 217-662 | ILLINOIS BELL TEL CO | 9329 | GEORGETOWN | IL | |
| 217-663 | METROPCS, INC. | 5562 | EFFINGHAM | IL | |
| 217-664 | FRONTIER NORTH, INC. - IL | 1015 | DE LAND | IL | |
| 217-665 | FRONTIER NORTH, INC. - IL | 1015 | BETHANY | IL | |
| 217-666 | ILLINOIS BELL TEL CO | 9329 | WEST DANA | IL | |
| 217-667 | ADAMS TEL. COOP. | 0976 | MINDALE | IL | |
| 217-668 | FRONTIER NORTH, INC. - IL | 1015 | NIANTIC | IL | |
| 217-669 | FRONTIER NORTH, INC. - IL | 1015 | CISCO | IL | |
| 217-671 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LINCOLN | IL | |
| 217-672 | FRONTIER NORTH, INC. - IL | 1015 | WARRENSBG | IL | |
| 217-673 | FRONTIER NORTH, INC. - IL | 1015 | WOODSON | IL | |
| 217-674 | FRONTIER COMMUNICATIONS OF MT. PULASKI, INC. | 1061 | LATHAM | IL | |
| 217-675 | FRONTIER NORTH, INC. - IL | 1015 | FRANKLIN | IL | |
| 217-676 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | MT AUBURN | IL | |
| 217-677 | FRONTIER NORTH, INC. - IL | 1015 | LA PLACE | IL | |
| 217-678 | FRONTIER NORTH, INC. - IL | 1015 | BEMENT | IL | |
| 217-682 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | STEWARDSON | IL | |
| 217-683 | MONTROSE MUTUAL TEL. CO. | 1058 | GILA | IL | |
| 217-684 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | PHILO | IL | |
| 217-685 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | SPRINGFLD | IL | |
| 217-687 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | SEYMOUR | IL | |
| 217-688 | FRONTIER NORTH, INC. - IL | 1015 | SIDNEY | IL | |
| 217-689 | TERRA NOVA TELECOM INC. | 145J | CHAMPAURBN | IL | |
| 217-690 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EFFINGHAM | IL | |
| 217-691 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SPRINGFLD | IL | |
| 217-692 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | BLUE MOUND | IL | |
| 217-693 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-694 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | FLATVILLE | 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.