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 |
|---|---|---|---|---|---|
| 925-201 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PLEASANTON | CA | |
| 925-202 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-208 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | DANVILLE | CA | |
| 925-209 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-210 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-211 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 925-212 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA | |
| 925-213 | SPOK, INC. | 6630 | WALNUT CRK | CA | |
| 925-215 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LIVERMORE | CA | |
| 925-216 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUBLN-SNRM | CA | |
| 925-217 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DANVILLE | CA | |
| 925-218 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PLEASANTON | CA | |
| 925-219 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANTIOCH | CA | |
| 925-221 | 33 WIRELESS INC. | 6967 | WALNUT CRK | CA | |
| 925-222 | ONVOY, LLC - CA | 649C | CONCORD | CA | |
| 925-223 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLEASANTON | CA | |
| 925-224 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-225 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-226 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLEASANTON | CA | |
| 925-227 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-228 | PACIFIC BELL | 9740 | MARTINEZ | CA | |
| 925-229 | PACIFIC BELL | 9740 | MARTINEZ | CA | |
| 925-230 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DUBLN-SNRM | CA | |
| 925-231 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MARTINEZ | CA | |
| 925-232 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PSBG WEST | CA | |
| 925-233 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SUNOL | CA | |
| 925-234 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ANTIOCH | CA | |
| 925-235 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MORAGA | CA | |
| 925-236 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DUBLN-SNRM | CA | |
| 925-237 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANTIOCH | CA | |
| 925-240 | PACIFIC BELL | 9740 | ECONTRCOST | CA | |
| 925-241 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DUBLN-SNRM | CA | |
| 925-242 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-243 | PACIFIC BELL | 9740 | LIVERMORE | CA | |
| 925-244 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-245 | PACIFIC BELL | 9740 | LIVERMORE | CA | |
| 925-246 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-247 | PACIFIC BELL | 9740 | MORAGA | CA | |
| 925-248 | PACIFIC BELL | 9740 | DUBLN-SNRM | CA | |
| 925-249 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-250 | METROPCS, INC. | 5562 | CONCORD | CA | |
| 925-251 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-252 | PACIFIC BELL | 9740 | PITTSBURG | CA | |
| 925-253 | PACIFIC BELL | 9740 | ORINDA | CA | |
| 925-254 | PACIFIC BELL | 9740 | ORINDA | CA | |
| 925-255 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | ORINDA | CA | |
| 925-256 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-257 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ORINDA | CA | |
| 925-258 | PACIFIC BELL | 9740 | ORINDA | CA | |
| 925-259 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ORINDA | 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.