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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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 931-823 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | LIVINGSTON | TN |
| — | 931-827 | 0XXX which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CUMBERLDCY | TN |
| — | 931-829 | not yet reported which blocks → | LORETTO TEL. CO., INC. | 0570 | ETHRIDGE | TN |
| — | 931-836 | not yet reported which blocks → | CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC | 4336 | SPARTA | TN |
| — | 931-837 | not yet reported which blocks → | BEN LOMAND COMMUNICATIONS, INC. | 4586 | SPARTA | TN |
| — | 931-839 | not yet reported which blocks → | CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC | 4336 | MONTEREY | TN |
| — | 931-840 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | COLUMBIA | TN |
| — | 931-841 | 2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | TULLAHOMA | TN |
| — | 931-842 | 1XXX2XXX3XXX4XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SHELBYVL | TN |
| — | 931-845 | not yet reported which blocks → | LORETTO TEL. CO., INC. | 0570 | ST JOSEPH | TN |
| — | 931-852 | not yet reported which blocks → | LORETTO TEL. CO., INC. | 0570 | LEOMA | TN |
| — | 931-853 | not yet reported which blocks → | LORETTO TEL. CO., INC. | 0570 | LORETTO | TN |
| — | 931-855 | not yet reported which blocks → | TN | |||
| — | 931-857 | none assigned yet which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | NORMANDY | TN |
| — | 931-858 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | BAXTER | TN |
| — | 931-863 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | CLARKRANGE | TN |
| — | 931-864 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | BYRDSTOWN | TN |
| — | 931-865 | not yet reported which blocks → | TN | |||
| — | 931-866 | not yet reported which blocks → | TN | |||
| — | 931-871 | 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LIVINGSTON | TN |
| — | 931-877 | not yet reported which blocks → | TN | |||
| — | 931-879 | not yet reported which blocks → | TWIN LAKES TEL. COOP. CORP. | 0579 | JAMESTOWN | TN |
| — | 931-881 | 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | COOKEVILLE | TN |
| — | 931-899 | 0XXX6XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - TN | 525E | LYNCHBURG | TN |
| — | 931-900 | not yet reported which blocks → | TN | |||
| — | 931-901 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | COLUMBIA | TN |
| — | 931-902 | 0XXX1XXX6XXX8XXX9XXX · 3 holders which blocks → | TELNYX LLC | 073H | HOHENWALD | TN |
| — | 931-903 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - TN | 525E | LAWRENCEBG | TN |
| — | 931-904 | 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | ONVOY, LLC - TN | 525E | MCEWEN | TN |
| — | 931-905 | 4XXX8XXX9XXX · 2 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-906 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-908 | 1XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | LYNNVILLE | TN |
| — | 931-909 | 0XXX1XXX2XXX6XXX7XXX8XXX · 2 holders which blocks → | ONVOY, LLC - TN | 525E | SHELBYVL | TN |
| — | 931-910 | 1XXX2XXX6XXX · 2 holders which blocks → | ONVOY, LLC - TN | 525E | PETERSBURG | TN |
| — | 931-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TN |
| — | 931-913 | 1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | TULLAHOMA | TN |
| — | 931-914 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - TN | 525E | MANCHESTER | TN |
| — | 931-915 | 8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | WINCHESTER | TN |
| — | 931-919 | 6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CLARKSVL | TN |
| — | 931-920 | not yet reported which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | CLARKSVL | TN |
| — | 931-922 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | COLUMBIA | TN |
| — | 931-924 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | MONTEAGLE | TN |
| — | 931-928 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | TULLAHOMA | TN |
| — | 931-931 | not yet reported which blocks → | TN | |||
| — | 931-933 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CLARKSVL | TN |
| — | 931-934 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | DIBRELL | TN |
| — | 931-935 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | BONDECROFT | TN |
| — | 931-937 | none assigned yet which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FLINTVILLE | TN |
| — | 931-939 | 1XXX8XXX9XXX · 3 holders which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | CENTERTOWN | TN |
| — | 931-946 | not yet reported which blocks → | BEN LOMAND RURAL TEL. COOP., INC. | 0553 | SPENCER | 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.