NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| — | 208-280 | 4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | TWIN FALLS | ID |
| — | 208-282 | not yet reported which blocks → | QWEST CORPORATION | 9636 | POCATELLO | ID |
| — | 208-283 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| — | 208-284 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| — | 208-285 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER | 4321 | GENESEE | ID |
| — | 208-286 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-287 | 8XXX9XXX which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | BOISE | ID |
| — | 208-288 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-289 | 0XXX1XXX9XXX · 2 holders which blocks → | POTLATCH TEL. CO., INC. | 2230 | KENDRICK | ID |
| — | 208-290 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | SANDPOINT | ID |
| — | 208-291 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | PAYETTE | ID |
| — | 208-292 | 4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | COERDALENE | ID |
| — | 208-293 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7865 | TWIN FALLS | ID |
| — | 208-297 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - ID | 7558 | BOISE | ID |
| — | 208-298 | 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEWISTON | ID |
| — | 208-300 | 3XXX4XXX8XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | RUPERT | ID |
| — | 208-301 | 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MOSCOW | ID |
| — | 208-304 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | SANDPOINT | ID |
| — | 208-305 | 0XXX2XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LEWISTON | ID |
| — | 208-306 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - ID | 689F | PRIEST RIV | ID |
| — | 208-307 | not yet reported which blocks → | ID | |||
| — | 208-308 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TWIN FALLS | ID |
| — | 208-309 | 4XXX6XXX7XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | KETCHUM | ID |
| — | 208-310 | 0XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | MOSCOW | ID |
| — | 208-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | ID |
| — | 208-312 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BURLEY | ID |
| — | 208-313 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | IDAHOFALLS | ID |
| — | 208-317 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | POCATELLO | ID |
| — | 208-318 | 3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NAMPA | ID |
| — | 208-319 | 4XXX6XXX which blocks → | PAETEC ITEL, LLC | 829J | BOISE | ID |
| — | 208-320 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | TWIN FALLS | ID |
| — | 208-321 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-322 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-323 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-324 | not yet reported which blocks → | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-325 | 0XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → | ZIPLY FIBER IDAHO, LLC DBA ZIPLY FIBER | 4427 | DONNELLY | ID |
| — | 208-326 | not yet reported which blocks → | FILER MUTUAL TEL CO | 2220 | FILER | ID |
| — | 208-327 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-328 | 1XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → | ZIPLY FIBER IDAHO, LLC DBA ZIPLY FIBER | 4427 | SPRINGFLD | ID |
| — | 208-329 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID | 6565 | TWIN FALLS | ID |
| — | 208-330 | not yet reported which blocks → | ONVOY, LLC - ID | 689F | BOISE | ID |
| — | 208-331 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-332 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-333 | 4XXX5XXX6XXX which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-334 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-335 | not yet reported which blocks → | DIRECT COMMUNICATIONS ROCKLAND, INC. | 2232 | ARBON | ID |
| — | 208-336 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-337 | 1XXX7XXX · 2 holders which blocks → | ZIPLY FIBER IDAHO, LLC DBA ZIPLY FIBER | 4427 | HOMEDALE | ID |
| — | 208-338 | not yet reported which blocks → | QWEST CORPORATION | 9636 | BOISE | ID |
| — | 208-340 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BOISE | ID |
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.