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 931
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 931-294 | not yet reported which blocks → | UNITED TELEPHONE COMPANY DBA UNITED COMMUNICATIONS | 0581 | UNIONVILLE | TN |
| — | 931-296 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | WAVERLY | TN |
| — | 931-300 | 0–9 XXXall 10 · 6 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | LAWRENCEBG | TN |
| — | 931-311 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TN |
| — | 931-320 | 8XXX9XXX · 2 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | CLARKSVL | TN |
| — | 931-326 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | PALMYRA | TN |
| — | 931-328 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | COLUMBIA | TN |
| — | 931-334 | 2XXX which blocks → | METROPCS, INC. | 5562 | COLUMBIA | TN |
| — | 931-338 | 8XXX which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | CLARKSVL | TN |
| — | 931-353 | not yet reported which blocks → | SPOK, INC. | 6630 | COLUMBIA | TN |
| — | 931-358 | 1XXX7XXX8XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | SANGO | TN |
| — | 931-359 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | LEWISBURG | TN |
| — | 931-362 | 1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FREDONIA | TN |
| — | 931-363 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | PULASKI | TN |
| — | 931-364 | not yet reported which blocks → | UNITED TELEPHONE COMPANY DBA UNITED COMMUNICATIONS | 0581 | CHAPELHILL | TN |
| — | 931-368 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | SANGO | TN |
| — | 931-371 | 0–9 XXXall 10 · 7 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | PULASKI | TN |
| — | 931-372 | not yet reported which blocks → | CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC | 4336 | COOKEVILLE | TN |
| — | 931-374 | 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | COLUMBIA | TN |
| — | 931-375 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | COLUMBIA | TN |
| — | 931-378 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-379 | none assigned yet which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | MTPLEASANT | TN |
| — | 931-380 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | COLUMBIA | TN |
| — | 931-381 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | COLUMBIA | TN |
| — | 931-384 | 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | COLUMBIA | TN |
| — | 931-386 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | WINCHESTER | TN |
| — | 931-387 | 1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CUNNINGHAM | TN |
| — | 931-388 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | COLUMBIA | TN |
| — | 931-389 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | WARTRACE | TN |
| — | 931-393 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | TULLAHOMA | TN |
| — | 931-394 | 5XXX which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | BEECHGROVE | TN |
| — | 931-397 | none assigned yet which blocks → | UNITED STATES CELLULAR - TN | 6278 | LIVINGSTON | TN |
| — | 931-398 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | COLUMBIA | TN |
| — | 931-403 | 7XXX which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | LIVINGSTON | TN |
| — | 931-405 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | GAINESBORO | TN |
| — | 931-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TN |
| — | 931-412 | 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → | ONVOY, LLC - TN | 525E | WAVERLY | TN |
| — | 931-413 | 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CUNNINGHAM | TN |
| — | 931-422 | 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LEWISBURG | TN |
| — | 931-423 | not yet reported which blocks → | TN | |||
| — | 931-424 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | PULASKI | TN |
| — | 931-425 | 2XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | BLANCHE | TN |
| — | 931-427 | not yet reported which blocks → | ARDMORE TEL. CO., INC. | 0280 | ARDMORE | TN |
| — | 931-431 | 1XXX7XXX8XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | SOOAKGROVE | TN |
| — | 931-432 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | COOKEVL SO | TN |
| — | 931-433 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FAYETTEVL | TN |
| — | 931-436 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | CLARKSVL | TN |
| — | 931-437 | not yet reported which blocks → | UNITED TELEPHONE COMPANY DBA UNITED COMMUNICATIONS | 0581 | FOSTERVL | TN |
| — | 931-438 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FAYETTEVL | TN |
| — | 931-442 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SANTA FE | TN |
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.