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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 925-260 | METROPCS, INC. | 5562 | WALNUT CRK | CA | |
| 925-261 | PACIFIC BELL | 9740 | PSBG WEST | CA | |
| 925-262 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALNUT CRK | CA | |
| 925-263 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DANVILLE | CA | |
| 925-264 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLEASANTON | CA | |
| 925-265 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CONCORD | CA | |
| 925-267 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PITTSBURG | CA | |
| 925-268 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MORAGA | CA | |
| 925-269 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARTINEZ | CA | |
| 925-270 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CONCORD | CA | |
| 925-271 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | PLEASANTON | CA | |
| 925-272 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DANVILLE | CA | |
| 925-273 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LIVERMORE | CA | |
| 925-274 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-275 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-276 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CLAYTON | CA | |
| 925-277 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-279 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-280 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-281 | ONVOY, LLC - CA | 649C | ANTIOCH | CA | |
| 925-282 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAFAYETTE | CA | |
| 925-283 | PACIFIC BELL | 9740 | LAFAYETTE | CA | |
| 925-284 | PACIFIC BELL | 9740 | LAFAYETTE | CA | |
| 925-285 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA | |
| 925-286 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA | |
| 925-287 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-288 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-290 | XO CALIFORNIA, INC. | 7262 | LIVERMORE | CA | |
| 925-291 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PSBG WEST | CA | |
| 925-292 | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LIVERMORE | CA | |
| 925-293 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | MARTINEZ | CA | |
| 925-294 | PACIFIC BELL | 9740 | LIVERMORE | CA | |
| 925-295 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-296 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-297 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAFAYETTE | CA | |
| 925-298 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | LAFAYETTE | CA | |
| 925-299 | PACIFIC BELL | 9740 | LAFAYETTE | CA | |
| 925-300 | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA | |
| 925-301 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANTIOCH | CA | |
| 925-302 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | BSHP RNCH | CA | |
| 925-303 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | ANTIOCH | CA | |
| 925-304 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CLAYTON | CA | |
| 925-305 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | CONCORD | CA | |
| 925-307 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | DUBLN-SNRM | CA | |
| 925-308 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | ECONTRCOST | CA | |
| 925-309 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | DANVILLE | CA | |
| 925-310 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | LAFAYETTE | CA | |
| 925-311 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 925-312 | SPOK, INC. | 6630 | ANTIOCH | CA | |
| 925-313 | PACIFIC BELL | 9740 | MARTINEZ | 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.