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 |
|---|---|---|---|---|---|
| 213-225 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 01 | CA | |
| 213-226 | PAETEC ITEL, LLC | 829J | LSAN DA 01 | CA | |
| 213-227 | NORTH COUNTY COMMUNICATION CORPORATION - CA | 7894 | LSAN DA 01 | CA | |
| 213-228 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-229 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-230 | AMERICAN MESSAGING SERVICES, LLC | 9748 | LSAN DA 01 | CA | |
| 213-232 | ONVOY, LLC - CA | 649C | LSAN DA 01 | CA | |
| 213-233 | PAETEC ITEL, LLC | 829J | LSAN DA 01 | CA | |
| 213-234 | PAETEC ITEL, LLC | 829J | LSAN DA 07 | CA | |
| 213-235 | PAETEC ITEL, LLC | 829J | LSAN DA 10 | CA | |
| 213-236 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-237 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-239 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-240 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-241 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-243 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-244 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-246 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | LSAN DA 01 | CA | |
| 213-247 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LSAN DA 01 | CA | |
| 213-248 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LSAN DA 01 | CA | |
| 213-249 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-250 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-251 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-252 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-253 | PACIFIC BELL | 9740 | LSAN DA 01 | CA | |
| 213-254 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LSAN DA 01 | CA | |
| 213-255 | T-MOBILE USA, INC. | 6529 | LSAN DA 07 | CA | |
| 213-258 | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA | |
| 213-259 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 07 | CA | |
| 213-260 | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 10 | CA | |
| 213-265 | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA | |
| 213-266 | AT&T ENTERPRISES, LLC | 516C | LSAN DA 01 | CA | |
| 213-270 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 01 | CA | |
| 213-271 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LSAN DA 01 | CA | |
| 213-273 | PACIFIC BELL | 9740 | LSAN DA 10 | CA | |
| 213-274 | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA | |
| 213-275 | ONVOY, LLC - CA | 649C | LSAN DA 07 | CA | |
| 213-276 | METROPCS NETWORKS, LLC | 899D | LSAN DA 01 | CA | |
| 213-278 | METROPCS NETWORKS, LLC | 899D | LSAN DA 01 | CA | |
| 213-284 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LSAN DA 07 | CA | |
| 213-285 | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 01 | CA | |
| 213-286 | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 01 | CA | |
| 213-287 | SPOK, INC. | 6630 | LSAN DA 01 | CA | |
| 213-291 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LSAN DA 01 | CA | |
| 213-292 | ONVOY, LLC - CA | 649C | LSAN DA 01 | CA | |
| 213-295 | ONVOY, LLC - CA | 649C | LSAN DA 07 | CA | |
| 213-298 | ONVOY, LLC - CA | 649C | LSAN DA 01 | CA | |
| 213-299 | AMERICAN MESSAGING SERVICES, LLC | 6906 | LSAN DA 07 | CA | |
| 213-303 | SPOK, INC. | 6630 | LSAN DA 01 | CA | |
| 213-305 | METROPCS NETWORKS, LLC | 899D | 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.