NumberResearchRecent prefix assignments
352 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
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 949-415 | FRONTIER CALIFORNIA INC. | 2319 | LAGUNA BCH | CA | |
| 949-417 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVINE | CA | |
| 949-419 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVINE | CA | |
| 949-420 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SADLBK VLY | CA | |
| 949-421 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SADLBK VLY | CA | |
| 949-422 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | IRVINE | CA | |
| 949-423 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWPORTBCH | CA | |
| 949-424 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAGUNA BCH | CA | |
| 949-425 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-428 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA | |
| 949-429 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CAPITRNVLY | CA | |
| 949-430 | COMCAST PHONE OF CALIFORNIA, LLC | 394L | IRVINE | CA | |
| 949-433 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | IRVINE | CA | |
| 949-435 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVINE | CA | |
| 949-437 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-439 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | IRVINE | CA | |
| 949-440 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-442 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-443 | PACIFIC BELL | 9740 | CAPITRNVLY | CA | |
| 949-444 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAPITRNVLY | CA | |
| 949-446 | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SADLBK VLY | CA | |
| 949-448 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-450 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-451 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-452 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-453 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-454 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-455 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-457 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-458 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-459 | PACIFIC BELL | 9740 | TRABUCO | CA | |
| 949-460 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-461 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-462 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-463 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LAGUNA BCH | CA | |
| 949-464 | FRONTIER CALIFORNIA INC. | 2319 | LAGUNA BCH | CA | |
| 949-465 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-467 | PACIFIC BELL | 9740 | NEWPORTBCH | CA | |
| 949-468 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | IRVINE | CA | |
| 949-470 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-471 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | IRVINE | CA | |
| 949-472 | PACIFIC BELL | 9740 | SADLBK VLY | CA | |
| 949-474 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-475 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-476 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-477 | PACIFIC BELL | 9740 | IRVINE | CA | |
| 949-478 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NEWPORTBCH | CA | |
| 949-480 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RNCHOVIEJO | CA | |
| 949-481 | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CAPITRNVLY | CA | |
| 949-483 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA |
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.