NumberResearchRecent prefix assignments
372 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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.
Most active assignees, last 30 days
New assignments by month
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Jan 2026
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Nov 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 562-947 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LA HABRA | CA |
| — | 562-948 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | PICORIVERA | CA |
| — | 562-949 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | PICORIVERA | CA |
| — | 562-950 | not yet reported which blocks → | CA | |||
| — | 562-951 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-958 | not yet reported which blocks → | CA | |||
| — | 562-959 | not yet reported which blocks → | CA | |||
| — | 562-961 | 0XXX2XXX4XXX5XXX7XXX · 2 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-964 | 2XXX which blocks → | METROPCS NETWORKS, LLC | 899D | DOWNEY | CA |
| — | 562-965 | 8XXX which blocks → | METROPCS NETWORKS, LLC | 899D | DOWNEY | CA |
| — | 562-967 | 0XXX1XXX2XXX3XXX4XXX9XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WHITTIER | CA |
| — | 562-968 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | WHITTIER | CA |
| — | 562-972 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LONG BEACH | CA |
| — | 562-976 | not yet reported which blocks → | CA | |||
| — | 562-977 | 3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | NORWALK | CA |
| — | 562-980 | 0XXX1XXX2XXX5XXX6XXX · 4 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-981 | 4XXX which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-982 | 3XXX4XXX · 2 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LAKEWOOD | CA |
| — | 562-983 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-984 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-985 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-986 | 0XXX3XXX8XXX · 3 holders which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-987 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | ALAMITOS | CA |
| — | 562-988 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-989 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-997 | not yet reported which blocks → | FRONTIER CALIFORNIA INC. | 2319 | LONG BEACH | CA |
| — | 562-999 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LONG BEACH | CA |
| — | 563-204 | 0–9 XXXall 10 · 4 holders which blocks → | TELNYX LLC | 073H | LANSING | IA |
| — | 563-206 | 0–9 XXXall 10 · 8 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | CLINTON | IA |
| — | 563-208 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - IA | 221F | MUSCATINE | IA |
| — | 563-210 | none assigned yet which blocks → | UNITED STATES CELLULAR - IA | 6266 | DAVENPORT | IA |
| — | 563-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | IA |
| — | 563-212 | none assigned yet which blocks → | UNITED STATES CELLULAR - IA | 6266 | CLINTON | IA |
| — | 563-213 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | DUBUQUE | IA |
| — | 563-219 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IA | 985E | CLINTON | IA |
| — | 563-225 | not yet reported which blocks → | CENTRAL SCOTT TEL. | 1125 | MCCAUSLAND | IA |
| — | 563-237 | 0XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS | 1170 | FREDECKSBG | IA |
| — | 563-238 | 0XXX4XXX6XXX · 3 holders which blocks → | WINDSTREAM IOWA COMMUNICATIONS, INC. | 1178 | LAWLER | IA |
| — | 563-241 | 2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | QWEST CORPORATION | 9631 | CLINTON | IA |
| — | 563-242 | not yet reported which blocks → | QWEST CORPORATION | 9631 | CLINTON | IA |
| — | 563-243 | not yet reported which blocks → | QWEST CORPORATION | 9631 | CLINTON | IA |
| — | 563-244 | not yet reported which blocks → | QWEST CORPORATION | 9631 | CLINTON | IA |
| — | 563-245 | 5XXX which blocks → | ALPINE COMMUNICATIONS, L.C. | 1106 | ELKADER | IA |
| — | 563-246 | not yet reported which blocks → | F&B COMMUNICATIONS, INC. | 1160 | CALAMUS | IA |
| — | 563-249 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | CLINTON | IA |
| — | 563-252 | 6XXX which blocks → | ALPINE COMMUNICATIONS, L.C. | 1106 | GUTTENBERG | IA |
| — | 563-255 | not yet reported which blocks → | ALPINE COMMUNICATIONS, L.C. | 1106 | GARBER | IA |
| — | 563-259 | 5XXX6XXX7XXX · 3 holders which blocks → | QWEST CORPORATION | 9631 | CLINTON | IA |
| — | 563-260 | none assigned yet which blocks → | UNITED STATES CELLULAR - IA | 6266 | MUSCATINE | IA |
| — | 563-262 | not yet reported which blocks → | QWEST CORPORATION | 9631 | MUSCATINE | IA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.