NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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, all time — NPA 208
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 208-536 | 0XXX3XXX7XXX8XXX · 4 holders which blocks → | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-537 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-538 | 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → | QWEST CORPORATION | 9636 | IDAHOFALLS | ID |
| — | 208-539 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | TWIN FALLS | ID |
| — | 208-540 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | POCATELLO | ID |
| — | 208-541 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | IDAHOFALLS | ID |
| — | 208-542 | not yet reported which blocks → | QWEST CORPORATION | 9636 | IDAHOFALLS | ID |
| — | 208-543 | 1XXX3XXX7XXX · 3 holders which blocks → | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-544 | 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-545 | not yet reported which blocks → | ONVOY, LLC - ID | 689F | BOISE | ID |
| — | 208-547 | 5XXX6XXX8XXX · 2 holders which blocks → | QWEST CORPORATION | 9636 | POCATELLO | ID |
| — | 208-548 | not yet reported which blocks → | DIRECT COMMUNICATIONS ROCKLAND, INC. | 2232 | ROCKLAND | ID |
| — | 208-549 | 5XXX6XXX7XXX9XXX · 3 holders which blocks → | QWEST CORPORATION | 9636 | WEISER | ID |
| — | 208-550 | 3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | WEISER | ID |
| — | 208-552 | not yet reported which blocks → | QWEST CORPORATION | 9636 | IDAHOFALLS | ID |
| — | 208-554 | 5XXX which blocks → | ALBION TELEPHONE CO. DBA ATC COMMUNICATIONS | 2213 | ARCO | ID |
| — | 208-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | ID |
| — | 208-556 | 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4321 | WALLACE | ID |
| — | 208-557 | 1XXX3XXX4XXX8XXX9XXX which blocks → | QWEST CORPORATION | 9636 | IDAHOFALLS | ID |
| — | 208-558 | not yet reported which blocks → | FREMONT TELCOM CO. | 2222 | ISLANDPARK | ID |
| — | 208-562 | 2XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-564 | not yet reported which blocks → | SILVER STAR TEL CO INC | 2295 | ALPINE | ID |
| — | 208-567 | not yet reported which blocks → | ONVOY, LLC - ID | 689F | BOISE | ID |
| — | 208-569 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | IDAHOFALLS | ID |
| — | 208-571 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| — | 208-574 | not yet reported which blocks → | COLUMBINE TELCO DBA SILVER STAR COMMUNICATIONS | 2214 | WAYAN | ID |
| — | 208-575 | not yet reported which blocks → | ONVOY, LLC - ID | 689F | BOISE | ID |
| — | 208-577 | 0–9 XXXall 10 · 5 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | BOISE | ID |
| — | 208-578 | 4XXX6XXX · 2 holders which blocks → | QWEST CORPORATION | 9636 | KETCHUM | ID |
| — | 208-580 | 3XXX4XXX7XXX8XXX · 3 holders which blocks → | QWEST CORPORATION | 9636 | MT HOME | ID |
| — | 208-583 | not yet reported which blocks → | OREGON-IDAHO UTILITIES, INC. | 2390 | SOUTH MT | ID |
| — | 208-584 | 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | ZIPLY FIBER IDAHO, LLC DBA ZIPLY FIBER | 4427 | SWEET | ID |
| — | 208-585 | 1XXX4XXX7XXX8XXX · 2 holders which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-587 | not yet reported which blocks → | QWEST CORPORATION | 9636 | MT HOME | ID |
| — | 208-588 | 8XXX which blocks → | ALBION TELEPHONE CO. DBA ATC COMMUNICATIONS | 2213 | MACKAY | ID |
| — | 208-589 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | POCATELLO | ID |
| — | 208-590 | 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | MT HOME | ID |
| — | 208-591 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | MT HOME | ID |
| — | 208-598 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MT HOME | ID |
| — | 208-599 | 6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MT HOME | ID |
| — | 208-602 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| — | 208-610 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SANDPOINT | ID |
| — | 208-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | ID |
| — | 208-618 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | POST FALLS | ID |
| — | 208-619 | 1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | POST FALLS | ID |
| — | 208-620 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | COERDALENE | ID |
| — | 208-622 | not yet reported which blocks → | QWEST CORPORATION | 9636 | KETCHUM | ID |
| — | 208-623 | 0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4321 | SPIRITLAKE | ID |
| — | 208-624 | not yet reported which blocks → | FREMONT TELCOM CO. | 2222 | ST ANTHONY | ID |
| — | 208-626 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - ID | 689F | COERDALENE | ID |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.