NumberResearchRecent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 615-574 | 0–9 XXXall 10 · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-575 | 2XXX3XXX6XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | GALLATIN | TN |
| — | 615-578 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-579 | none assigned yet which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | NASHVILLE | TN |
| — | 615-582 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-584 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-585 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-586 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-587 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NASHVILLE | TN |
| — | 615-589 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-590 | 3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | HENDERSNVL | TN |
| — | 615-591 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FRANKLIN | TN |
| — | 615-592 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | TRIUNE | TN |
| — | 615-593 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-594 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-595 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FRANKLIN | TN |
| — | 615-596 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NASHVILLE | TN |
| — | 615-597 | not yet reported which blocks → | DEKALB TEL. COOP. | 0562 | SMITHVILLE | TN |
| — | 615-598 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NASHVILLE | TN |
| — | 615-599 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FRANKLIN | TN |
| — | 615-604 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NASHVILLE | TN |
| — | 615-608 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | OLDHICKORY | TN |
| — | 615-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TN |
| — | 615-612 | 0XXX8XXX9XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-620 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | NASHVILLE | TN |
| — | 615-622 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - TN | 525E | NASHVILLE | TN |
| — | 615-625 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | SMYRNA | TN |
| — | 615-627 | 6XXX7XXX8XXX which blocks → | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | NASHVILLE | TN |
| — | 615-628 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF TENNESSEE, LLC - TN | 7517 | FRANKLIN | TN |
| — | 615-631 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MURFREESBO | TN |
| — | 615-633 | none assigned yet which blocks → | NORTH CENTRAL TEL. COOP., INC. | 0573 | HILLSDALE | TN |
| — | 615-634 | 0–9 XXXwhole prefix which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| — | 615-635 | 0–9 XXXall 10 · 2 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | NASHVILLE | TN |
| — | 615-641 | not yet reported which blocks → | TENNESSEE TEL. CO. | 0575 | LAVERGNE | TN |
| — | 615-642 | none assigned yet which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | NASHVILLE | TN |
| — | 615-643 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | GREENBRIER | TN |
| — | 615-644 | not yet reported which blocks → | NORTH CENTRAL TEL. COOP., INC. | 0573 | WESTMORELD | TN |
| — | 615-646 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-650 | 3XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-654 | 1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CRSPLORLND | TN |
| — | 615-655 | 8XXX which blocks → | NORTH CENTRAL TEL. COOP., INC. | 0573 | GREENGROVE | TN |
| — | 615-660 | 0XXX2XXX3XXX4XXX7XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-661 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-662 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-664 | 0XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-665 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
| — | 615-666 | not yet reported which blocks → | NORTH CENTRAL TEL. COOP., INC. | 0573 | LAFAYETTE | TN |
| — | 615-671 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | CHARLOTTE | TN |
| — | 615-672 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | WHITEHOUSE | TN |
| — | 615-673 | 4XXX5XXX · 2 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NASHVILLE | TN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.