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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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 217-326 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-327 | ADAMS TEL. COOP. | 0976 | CHAMBERSBG | IL | |
| 217-328 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-329 | PAETEC ITEL, LLC | 829J | DECATUR | IL | |
| 217-330 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | DECATUR | IL | |
| 217-331 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | SPRINGFLD | IL | |
| 217-332 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-333 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-334 | ILLINOIS BELL TEL CO | 9329 | COLUMBUS | IL | |
| 217-335 | FRONTIER NORTH, INC. - IL | 1015 | BARRY | IL | |
| 217-336 | FRONTIER NORTH, INC. - IL | 1015 | BAYLIS | IL | |
| 217-337 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-338 | ADAMS TEL. COOP. | 0976 | FISHHOOK | IL | |
| 217-339 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | CHENEYVL | IL | |
| 217-340 | TELNYX LLC | 073H | MARSHALL | IL | |
| 217-341 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SPRINGFLD | IL | |
| 217-342 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | EFFINGHAM | IL | |
| 217-343 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EFFINGHAM | IL | |
| 217-344 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-345 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | CHARLESTON | IL | |
| 217-346 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | OAKLAND | IL | |
| 217-347 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | EFFINGHAM | IL | |
| 217-348 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | CHARLESTON | IL | |
| 217-349 | ILLINOIS CONSOLIDATED TEL. CO. | 1037 | ASHMORE | IL | |
| 217-351 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-352 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-353 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-354 | ILLINOIS BELL TEL CO | 9329 | OAKWOOD | IL | |
| 217-355 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-356 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-357 | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | CARTHAGE | IL | |
| 217-359 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-361 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPRINGFLD | IL | |
| 217-362 | ILLINOIS BELL TEL CO | 9329 | DECATUR | IL | |
| 217-363 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-364 | ILLINOIS BELL TEL CO | 9329 | BUFFALO | IL | |
| 217-365 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-366 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-367 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-368 | FRONTIER NORTH, INC. - IL | 1015 | GREENFIELD | IL | |
| 217-369 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHAMPAURBN | IL | |
| 217-370 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSONVL | IL | |
| 217-371 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSONVL | IL | |
| 217-372 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-373 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | IL | |
| 217-374 | FRONTIER NORTH, INC. - IL | 1015 | WHITE HALL | IL | |
| 217-375 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | EAST LYNN | IL | |
| 217-376 | FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 1000 | EMDEN | IL | |
| 217-377 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHAMPAURBN | IL | |
| 217-378 | ILLINOIS BELL TEL CO | 9329 | CHAMPAURBN | 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.