NumberResearchRecent prefix assignments
380 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
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
Aug 2026
Jul 2026
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May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 972-726 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-727 | SOUTHWESTERN BELL | 9533 | ALLEN | TX | |
| 972-728 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-729 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-730 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-731 | SOUTHWESTERN BELL | 9533 | FRISCO | TX | |
| 972-732 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-733 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-734 | SOUTHWESTERN BELL | 9533 | PRINCETON | TX | |
| 972-735 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-736 | SOUTHWESTERN BELL | 9533 | PRINCETON | TX | |
| 972-738 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-739 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-740 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-741 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-742 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-743 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-744 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-745 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-747 | SOUTHWESTERN BELL | 9533 | ALLEN | TX | |
| 972-748 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DE SOTO | TX | |
| 972-749 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-751 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-752 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 2154 | BLUE RIDGE | TX | |
| 972-753 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-754 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-755 | ONVOY, LLC - TX | 903C | DALLAS | TX | |
| 972-756 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-757 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-758 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-759 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-760 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 972-761 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-763 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-764 | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | DALLAS | TX | |
| 972-766 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-767 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLANO | TX | |
| 972-768 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX | |
| 972-769 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-770 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-771 | SOUTHWESTERN BELL | 9533 | ROCKWALL | TX | |
| 972-772 | SOUTHWESTERN BELL | 9533 | ROCKWALL | TX | |
| 972-773 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-774 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-775 | SOUTHWESTERN BELL | 9533 | MIDLOTHIAN | TX | |
| 972-776 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-778 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-779 | SOUTHWESTERN BELL | 9533 | CEDAR HILL | TX | |
| 972-780 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-781 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.