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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 209-233 | T-MOBILE USA, INC. | 6529 | MERCED | CA | |
| 209-234 | PACIFIC BELL | 9740 | STOCKTON | CA | |
| 209-235 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | STOCKTON | CA | |
| 209-236 | PACIFIC BELL | 9740 | MODESTO | CA | |
| 209-238 | PACIFIC BELL | 9740 | MODESTO | CA | |
| 209-239 | FRONTIER CALIFORNIA INC. | 4420 | MANTECA | CA | |
| 209-240 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA | |
| 209-241 | T-MOBILE USA, INC. | 6529 | MODESTO | CA | |
| 209-242 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | STOCKTON | CA | |
| 209-243 | COMCAST PHONE OF CALIFORNIA, LLC | 394L | NEWMAN | CA | |
| 209-244 | T-MOBILE USA, INC. | 6529 | STOCKTON | CA | |
| 209-245 | PACIFIC BELL | 9740 | PLYMOUTH | CA | |
| 209-246 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRESNO | CA | |
| 209-248 | BANDWIDTH.COM CLEC, LLC - CA | 981E | MODESTO | CA | |
| 209-249 | UTILITY TELECOM GROUP, LLC - CA | 9262 | MANTECA | CA | |
| 209-251 | METROPCS, INC. | 5562 | GALT | CA | |
| 209-254 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | RIPON | CA | |
| 209-257 | PACIFIC BELL | 9740 | JACKSON | CA | |
| 209-258 | VOLCANO TEL. CO. | 2343 | KIRKWD MDW | CA | |
| 209-260 | BANDWIDTH.COM CLEC, LLC - CA | 981E | HERALD | CA | |
| 209-264 | BANDWIDTH.COM CLEC, LLC - CA | 981E | PINECREST | CA | |
| 209-265 | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALLACE | CA | |
| 209-266 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | COULTERVL | CA | |
| 209-267 | PACIFIC BELL | 9740 | SUTTER CRK | CA | |
| 209-274 | PACIFIC BELL | 9740 | IONE | CA | |
| 209-282 | AMERICAN MESSAGING SERVICES, LLC | 9748 | TURLOCK | CA | |
| 209-286 | PACIFIC BELL | 9740 | MOKELUMNHL | CA | |
| 209-288 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNRA MAIN | CA | |
| 209-293 | VOLCANO TEL. CO. | 2343 | WEST POINT | CA | |
| 209-295 | VOLCANO TEL. CO. | 2343 | PIONEER | CA | |
| 209-296 | VOLCANO TEL. CO. | 2343 | VOLCANO | CA | |
| 209-297 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ANGELSCAMP | CA | |
| 209-300 | ONVOY, LLC - CA | 649C | MODESTO | CA | |
| 209-304 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | JACKSON | CA | |
| 209-311 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 209-313 | T-MOBILE USA, INC. | 6529 | STOCKTON | CA | |
| 209-315 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RIVERBANK | CA | |
| 209-320 | ONVOY, LLC - CA | 649C | STOCKTON | CA | |
| 209-321 | T-MOBILE USA, INC. | 6529 | TRACY | CA | |
| 209-322 | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OAKDALE | CA | |
| 209-323 | NUSO, LLC | 551G | STOCKTON | CA | |
| 209-324 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MODESTO | CA | |
| 209-327 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LODI | CA | |
| 209-329 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LODI | CA | |
| 209-330 | ONVOY, LLC - CA | 649C | WTFR MAIN | CA | |
| 209-331 | PACIFIC BELL | 9740 | LODI | CA | |
| 209-332 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | IONE | CA | |
| 209-333 | PACIFIC BELL | 9740 | LODI | CA | |
| 209-334 | PACIFIC BELL | 9740 | LODI | CA | |
| 209-336 | BANDWIDTH.COM CLEC, LLC - CA | 981E | YOSEMITE | 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.