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 |
|---|---|---|---|---|---|
| 925-943 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-944 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-945 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-946 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-947 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-948 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | WALNUT CRK | CA | |
| 925-949 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | WALNUT CRK | CA | |
| 925-950 | CA | ||||
| 925-951 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WALNUT CRK | CA | |
| 925-952 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-953 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | WALNUT CRK | CA | |
| 925-954 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WALNUT CRK | CA | |
| 925-955 | UTILITY TELECOM GROUP, LLC - CA | 9262 | WALNUT CRK | CA | |
| 925-956 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WALNUT CRK | CA | |
| 925-957 | PACIFIC BELL | 9740 | MARTINEZ | CA | |
| 925-958 | CA | ||||
| 925-959 | CA | ||||
| 925-960 | PACIFIC BELL | 9740 | LIVERMORE | CA | |
| 925-961 | PACIFIC BELL | 9740 | LIVERMORE | CA | |
| 925-962 | PACIFIC BELL | 9740 | LAFAYETTE | CA | |
| 925-963 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA | |
| 925-964 | PACIFIC BELL | 9740 | DANVILLE | CA | |
| 925-965 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | PLEASANTON | CA | |
| 925-967 | PACIFIC BELL | 9740 | DUBLN-SNRM | CA | |
| 925-968 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-969 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-973 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-974 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-975 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-976 | CA | ||||
| 925-977 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-978 | PACIFIC BELL | 9740 | ANTIOCH | CA | |
| 925-979 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-980 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LIVERMORE | CA | |
| 925-983 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BSHP RNCH | CA | |
| 925-984 | METROPCS, INC. | 5562 | DANVILLE | CA | |
| 925-988 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-989 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLEASANTON | CA | |
| 925-990 | UTILITY TELECOM GROUP, LLC - CA | 9262 | SUNOL | CA | |
| 925-993 | HD CARRIER LLC | 321J | CLAYTON | CA | |
| 925-997 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUBLN-SNRM | CA | |
| 925-998 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA | |
| 925-999 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DUBLN-SNRM | CA | |
| 928-200 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | GLOBE | AZ | |
| 928-201 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BULLHEADCY | AZ | |
| 928-203 | QWEST CORPORATION | 9636 | SEDONA | AZ | |
| 928-204 | QWEST CORPORATION | 9636 | SEDONA | AZ | |
| 928-210 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | YUMA | AZ | |
| 928-211 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | AZ | |
| 928-213 | QWEST CORPORATION | 9636 | FLAGSTAFF | AZ |
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.