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 |
|---|---|---|---|---|---|
| 213-307 | AMERICAN MESSAGING SERVICES, LLC | 9748 | LSAN DA 01 | CA | |
| 213-311 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 213-312 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-316 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 01 | CA | |
| 213-317 | FIVE9, INC. | 598J | LSAN DA 01 | CA | |
| 213-321 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LSAN DA 01 | CA | |
| 213-323 | CA | ||||
| 213-324 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA | |
| 213-325 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | LSAN DA 01 | CA | |
| 213-327 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-333 | 33 WIRELESS INC. | 6967 | LSAN DA 01 | CA | |
| 213-336 | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 10 | CA | |
| 213-338 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | LSAN DA 02 | CA | |
| 213-339 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-341 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LSAN DA 10 | CA | |
| 213-342 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 07 | CA | |
| 213-344 | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA | |
| 213-345 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-346 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-347 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-348 | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 07 | CA | |
| 213-350 | SPOK, INC. | 6630 | LSAN DA 01 | CA | |
| 213-351 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-353 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-355 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 10 | CA | |
| 213-356 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-360 | SPOK, INC. | 6630 | LSAN DA 01 | CA | |
| 213-362 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-363 | 33 WIRELESS INC. | 6967 | LSAN DA 01 | CA | |
| 213-364 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LSAN DA 01 | CA | |
| 213-365 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-366 | 33 WIRELESS INC. | 6967 | CMTN GRDN | CA | |
| 213-367 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-368 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-369 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LSAN DA 01 | CA | |
| 213-373 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 07 | CA | |
| 213-375 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 10 | CA | |
| 213-377 | ONVOY, LLC - CA | 649C | LSAN DA 10 | CA | |
| 213-380 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-381 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-382 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-383 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-384 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-385 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-386 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-387 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-388 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-389 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-391 | AMERICAN MESSAGING SERVICES, LLC | 9748 | LSAN DA 01 | CA | |
| 213-392 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LSAN DA 01 | CA |
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.