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 931
New assignments by month
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 931-546 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | SOOAKGROVE | TN |
| — | 931-548 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | COLUMBIA | TN |
| — | 931-551 | 0XXX1XXX2XXX · 2 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-552 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-553 | 1XXX3XXX9XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | TN |
| — | 931-556 | not yet reported which blocks → | LORETTO TEL. CO., INC. | 0570 | FIVEPOINTS | TN |
| — | 931-557 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | FAYETTEVL | TN |
| — | 931-559 | not yet reported which blocks → | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | COOKEVILLE | TN |
| — | 931-560 | 6XXX7XXX8XXX9XXX · 2 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | COLUMBIA | TN |
| — | 931-561 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-563 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | TULLAHOMA | TN |
| — | 931-565 | not yet reported which blocks → | ARDMORE TEL. CO., INC. | 0280 | MINOR HILL | TN |
| — | 931-572 | 4XXX5XXX · 2 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-576 | 0XXX1XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | WILLIAMSPT | TN |
| — | 931-580 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SHELBYVL | TN |
| — | 931-581 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | TULLAHOMA | TN |
| — | 931-582 | none assigned yet which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | MCEWEN | TN |
| — | 931-583 | none assigned yet which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | WILLIAMSPT | TN |
| — | 931-589 | none assigned yet which blocks → | TENNESSEE TEL. CO. | 0575 | LINDEN | TN |
| — | 931-591 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | CLARKSVL | TN |
| — | 931-592 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | TRACY CITY | TN |
| — | 931-593 | 5XXX6XXX7XXX9XXX · 2 holders which blocks → | TENNESSEE TEL. CO. | 0575 | LOBELVILLE | TN |
| — | 931-596 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | HILLSBORO | TN |
| — | 931-598 | none assigned yet which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | SEWANEE | TN |
| — | 931-600 | 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - TN | 525E | COLLINWOOD | TN |
| — | 931-607 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SHELBYVL | TN |
| — | 931-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TN |
| — | 931-615 | not yet reported which blocks → | TN | |||
| — | 931-619 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SHELBYVL | TN |
| — | 931-621 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | NORTH SPG | TN |
| — | 931-622 | 5XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | WAVERLY | TN |
| — | 931-623 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LYLES | TN |
| — | 931-624 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-625 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | FAYETTEVL | TN |
| — | 931-626 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | COLUMBIA | TN |
| — | 931-627 | 3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DOVER | TN |
| — | 931-628 | 3XXX4XXX5XXX7XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HOHENWALD | TN |
| — | 931-629 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LAWRENCEBG | TN |
| — | 931-632 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LYNCHBURG | TN |
| — | 931-634 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | DOVER | TN |
| — | 931-635 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | VIOLA | TN |
| — | 931-636 | 5XXX6XXX8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | WINCHESTER | TN |
| — | 931-637 | 5XXX6XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LEWISBURG | TN |
| — | 931-638 | 4XXX5XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PULASKI | TN |
| — | 931-639 | 4XXX5XXX6XXX8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SHELBYVL | TN |
| — | 931-645 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-646 | 9XXX which blocks → | CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC | 4336 | COOKEVILLE | TN |
| — | 931-647 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-648 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
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.