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 |
|---|---|---|---|---|---|---|
| — | 931-216 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-217 | 2XXX5XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLARKSVL | TN |
| — | 931-219 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | CENTERVL | TN |
| — | 931-220 | 6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-221 | 2XXX8XXX9XXX · 3 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-222 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | TULLAHOMA | TN |
| — | 931-223 | 0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | COLUMBIA | TN |
| — | 931-224 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SHELBYVL | TN |
| — | 931-225 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | SHELBYVL | TN |
| — | 931-226 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | PULASKI | TN |
| — | 931-227 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | FAYETTEVL | TN |
| — | 931-228 | 0XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | MCEWEN | TN |
| — | 931-229 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | LYNCHBURG | TN |
| — | 931-230 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | HOHENWALD | TN |
| — | 931-231 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | LAWRENCEBG | TN |
| — | 931-232 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | DOVER | TN |
| — | 931-233 | 2XXX8XXX which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | CLARKSVL | TN |
| — | 931-235 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | MANCHESTER | TN |
| — | 931-237 | 9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLARKSVL | TN |
| — | 931-241 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLARKSVL | TN |
| — | 931-242 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LAWRENCEBG | TN |
| — | 931-243 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | CELINA | TN |
| — | 931-244 | 0–9 XXXall 10 · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LAWRENCEBG | TN |
| — | 931-245 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | CLARKSVL | TN |
| — | 931-246 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | LEWISBURG | TN |
| — | 931-247 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | TULLAHOMA | TN |
| — | 931-248 | 6XXX7XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CROSSVILLE | TN |
| — | 931-249 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-252 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | COOKEVILLE | TN |
| — | 931-258 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | MOSS | TN |
| — | 931-260 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | COOKEVILLE | TN |
| — | 931-261 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | COOKEVILLE | TN |
| — | 931-264 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | WAVERLY | TN |
| — | 931-265 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | COOKEVILLE | TN |
| — | 931-266 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CLARKSVL | TN |
| — | 931-267 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | COOKEVILLE | TN |
| — | 931-268 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | GAINESBORO | TN |
| — | 931-270 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | LEWISBURG | TN |
| — | 931-273 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | MANCHESTER | TN |
| — | 931-274 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | CLARKSVL | TN |
| — | 931-276 | not yet reported which blocks → | UNITED TELEPHONE COMPANY DBA UNITED COMMUNICATIONS | 0581 | BELFAST | TN |
| — | 931-277 | 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC | 4336 | PLEASANTHL | TN |
| — | 931-278 | 4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLARKSVL | TN |
| — | 931-279 | 5XXX6XXX7XXX8XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LAWRENCEBG | TN |
| — | 931-284 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | COOKEVILLE | TN |
| — | 931-285 | 3XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | HAMPSHIRE | TN |
| — | 931-286 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | COLUMBIA | TN |
| — | 931-288 | 0–9 XXXall 10 · 7 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | LEWISBURG | TN |
| — | 931-289 | not yet reported which blocks → | PEOPLES TEL. CO. | 0576 | ERIN | TN |
| — | 931-293 | 1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | TENNESSEE TEL. CO. | 0575 | CORNERSVL | 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.