Recent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 561-982 | 6XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-983 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | BELLEGLADE | FL |
| — | 561-985 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BELLEGLADE | FL |
| — | 561-988 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-989 | 4XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-991 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | XXXXXXXXXX | FL |
| — | 561-992 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BELLEGLADE | FL |
| — | 561-993 | 0XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BELLEGLADE | FL |
| — | 561-994 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-995 | 3XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-996 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BELLEGLADE | FL |
| — | 561-997 | 4XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-998 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 561-999 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | BOCA RATON | FL |
| — | 562-201 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WHITTIER | CA |
| — | 562-204 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WHITTIER | CA |
| — | 562-205 | 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PICORIVERA | CA |
| — | 562-207 | 5XXX7XXX8XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NORWALK | CA |
| — | 562-208 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-209 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA |
| — | 562-212 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-213 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LAKEWOOD | CA |
| — | 562-214 | not yet reported which blocks → | SPOK, INC. | 6630 | LAKEWOOD | CA |
| — | 562-215 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NORWALK | CA |
| — | 562-216 | 0XXX3XXX which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LONG BEACH | CA |
| — | 562-218 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-220 | 8XXX which blocks → | PACIFIC BELL | 9740 | CMTN CMTN | CA |
| — | 562-222 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | PICORIVERA | CA |
| — | 562-223 | not yet reported which blocks → | 33 WIRELESS INC. | 6967 | CMTN CMTN | CA |
| — | 562-224 | not yet reported which blocks → | 33 WIRELESS INC. | 6967 | LAKEWOOD | CA |
| — | 562-225 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-226 | not yet reported which blocks → | SPOK, INC. | 6630 | NORWALK | CA |
| — | 562-227 | not yet reported which blocks → | SPOK, INC. | 6630 | NORWALK | CA |
| — | 562-228 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | NORWALK | CA |
| — | 562-229 | 2XXX4XXX6XXX8XXX which blocks → | FRONTIER CALIFORNIA INC. | 2319 | NORWALK | CA |
| — | 562-230 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-231 | 0XXX6XXX7XXX8XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DOWNEY | CA |
| — | 562-232 | 3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CMTN CMTN | CA |
| — | 562-233 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LONG BEACH | CA |
| — | 562-234 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-235 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| — | 562-236 | 0XXX6XXX7XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WHITTIER | CA |
| — | 562-237 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → | PACIFIC BELL (COMPETITIVE) | 7480 | LA HABRA | CA |
| — | 562-238 | not yet reported which blocks → | SPOK, INC. | 6630 | CMTN CMTN | CA |
| — | 562-239 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | NORWALK | CA |
| — | 562-240 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | ALAMITOS | CA |
| — | 562-242 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - CA | 649C | LA HABRA | CA |
| — | 562-243 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LONG BEACH | CA |
| — | 562-244 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LONG BEACH | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.