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
Sep 2026
Aug 2026
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 214-549 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-551 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | MCKINNEY | TX | |
| 214-552 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-553 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-555 | MULTIPLE OCN LISTING | MULT | DIR ASST | TX | |
| 214-556 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLANO | TX | |
| 214-557 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX | |
| 214-558 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-559 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-560 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-561 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-563 | METROPCS, INC. | 5562 | GRANDPRARI | TX | |
| 214-564 | METROPCS, INC. | 5562 | GRANDPRARI | TX | |
| 214-565 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-566 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-567 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-568 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-569 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-570 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-571 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-572 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-573 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-574 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-575 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-576 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-577 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-579 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-580 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-581 | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRANDPRARI | TX | |
| 214-582 | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRANDPRARI | TX | |
| 214-583 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-584 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-585 | SOUTHWESTERN BELL | 9533 | MCKINNEY | TX | |
| 214-587 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX | |
| 214-588 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 214-589 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-590 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-591 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 214-593 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-595 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 214-596 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | IRVING | TX | |
| 214-597 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-599 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-603 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX | |
| 214-607 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 214-609 | T-MOBILE USA, INC. | 6529 | WAXAHACHIE | TX | |
| 214-610 | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | TX | |
| 214-611 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX | |
| 214-613 | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DALLAS | TX | |
| 214-614 | XO TEXAS, INC. | 8958 | IRVING | TX |
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.