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 |
|---|---|---|---|---|---|
| 217-563 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | NOKOMIS | IL | |
| 217-564 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | IVESDALE | IL | |
| 217-566 | FRONTIER NORTH, INC. - IL | 1015 | WILLIAMSVL | IL | |
| 217-567 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | TOWER HILL | IL | |
| 217-568 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | GIFFORD | IL | |
| 217-569 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | ARMSTRONG | IL | |
| 217-570 | T-MOBILE USA, INC. | 6529 | CLINTON | IL | |
| 217-574 | TELNYX LLC | 073H | FAIRMOUNT | IL | |
| 217-575 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | WARSAW | IL | |
| 217-577 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | QUINCY | IL | |
| 217-578 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | ATWOOD | IL | |
| 217-580 | FRONTIER COMMUNICATIONS OF MT. PULASKI, INC. | 1061 | MT PULASKI | IL | |
| 217-581 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | CHARLESTON | IL | |
| 217-582 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | OGDEN | IL | |
| 217-583 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | ROYAL | IL | |
| 217-584 | FRONTIER NORTH, INC. - IL | 1015 | MEREDOSIA | IL | |
| 217-585 | ILLINOIS BELL TEL CO | 9329 | SPRINGFLD | IL | |
| 217-586 | FRONTIER NORTH, INC. - IL | 1015 | MAHOMET | IL | |
| 217-587 | FRONTIER NORTH, INC. - IL | 1015 | MANCHESTER | IL | |
| 217-588 | ILLINOIS BELL TEL CO | 9329 | SPRINGFLD | IL | |
| 217-589 | FRONTIER NORTH, INC. - IL | 1015 | ROODHOUSE | IL | |
| 217-590 | FRONTIER NORTH, INC. - IL | 1015 | MAHOMET | IL | |
| 217-591 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-592 | ILLINOIS BELL TEL CO | 9329 | QUINCY | IL | |
| 217-593 | FRONTIER NORTH, INC. - IL | 1015 | CAMP POINT | IL | |
| 217-594 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | WITT | IL | |
| 217-595 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | PENFIELD | IL | |
| 217-597 | METROPCS, INC. | 5562 | DANVILLE | IL | |
| 217-598 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | SADORUS | IL | |
| 217-601 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GEORGETOWN | IL | |
| 217-602 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSONVL | IL | |
| 217-603 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | ASHMORE | IL | |
| 217-608 | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | HILLSBORO | IL | |
| 217-609 | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | CASEY | IL | |
| 217-611 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | IL | |
| 217-619 | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | DECATUR | IL | |
| 217-620 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | DECATUR | IL | |
| 217-621 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHAMPAURBN | IL | |
| 217-622 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | SPRINGFLD | IL | |
| 217-623 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | EDINBURG | IL | |
| 217-624 | FRONTIER NORTH, INC. - IL | 1015 | LOAMI | IL | |
| 217-625 | FRONTIER NORTH, INC. - IL | 1015 | PAWNEE | IL | |
| 217-626 | FRONTIER NORTH, INC. - IL | 1015 | PLEASANTPL | IL | |
| 217-627 | FRONTIER NORTH, INC. - IL | 1015 | GIRARD | IL | |
| 217-628 | FRONTIER NORTH, INC. - IL | 1015 | DIVERNON | IL | |
| 217-629 | ILLINOIS BELL TEL CO | 9329 | RIVERTON | IL | |
| 217-630 | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | NOKOMIS | IL | |
| 217-632 | ILLINOIS BELL TEL CO | 9329 | PETERSBURG | IL | |
| 217-633 | ONVOY SPECTRUM, LLC | 624H | HARTSBURG | IL | |
| 217-634 | ILLINOIS BELL TEL CO | 9329 | TALLULA | 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.