NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 80
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 72
NEW CINGULAR WIRELESS PCS, LLC - GA 53
LEVEL 3 COMMUNICATIONS, LLC - TN 45
POWERTEL NASHVILLE LICENSES, INC. 39
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-02-11 931-643 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 LEWISBURG TN
2022-01-12 931-357 0–9 XXXall 10 · 2 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 BAXTER TN
2021-12-14 931-677 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 SANGO TN
2021-11-23 931-356 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 MCMINNVL TN
2021-11-17 931-633 2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F LYLES TN
2021-11-15 931-907 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H COOKEVILLE TN
2021-10-11 931-350 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F COLUMBIA TN
2021-09-08 931-404 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J COOKEVILLE TN
2021-08-17 931-346 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLARKSVL TN
2021-04-13 931-344 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → ONVOY, LLC - TN 525E PLEASANTHL TN
2021-03-31 931-710 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TN 525E CROSSVILLE TN
2021-03-16 931-343 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLARKSVL TN
2021-01-14 931-342 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLARKSVL TN
2020-07-15 931-345 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SPARTA TN
2020-07-15 931-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WINCHESTER TN
2020-07-15 931-500 0XXX1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H SUMMERTOWN TN
2020-07-15 931-977 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CLIFTON TN
2020-05-06 931-531 1XXX2XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - TN 525E WAYNESBORO TN
2020-02-27 931-340 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 CROSSVILLE TN
2020-01-13 931-290 0XXX4XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CELINA TN
2020-01-13 931-336 6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOSS TN
2019-11-21 931-391 0XXX1XXX3XXX9XXX · 2 holders which blocks → ONVOY, LLC - TN 525E LINDEN TN
2019-09-05 931-280 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 BAXTER TN
2019-04-19 931-597 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F LEWISBURG TN
2019-04-16 931-355 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 SOOAKGROVE TN
2019-02-25 931-271 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MCMINNVL TN
2019-01-22 931-777 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H COLUMBIA TN
2019-01-18 931-999 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CLARKSVL TN
2019-01-15 931-236 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - TN 525E FREDONIA TN
2019-01-15 931-382 0XXX1XXX2XXX8XXX · 3 holders which blocks → ONVOY, LLC - TN 525E HAMPSHIRE TN
2019-01-03 931-990 8XXX9XXX · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J PETERSBURG TN
2018-06-05 931-275 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BELFAST TN
2017-12-05 931-341 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K COOKEVL SO TN
2017-09-29 931-666 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - TN 525E CUMBERLDCY TN
2017-09-01 931-329 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 HOHENWALD TN
2017-06-29 931-655 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 PETERSBURG TN
2017-03-22 931-272 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H CLARKSVL TN
2017-03-22 931-324 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H LAWRENCEBG TN
2017-02-27 931-828 2XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ETHRIDGE TN
2017-02-23 931-888 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELNYX LLC 073H WAVERLY TN
2017-02-22 931-843 9XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LORETTO TN
2017-02-22 931-846 2XXX9XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST JOSEPH TN
2017-02-22 931-851 9XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LEOMA TN
2017-02-06 931-283 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7977 WINCHESTER TN
2017-01-17 931-291 0–9 XXXall 10 · 5 holders which blocks → JACKSON ENERGY AUTHORITY - TN 150G CLARKSVL TN
2016-03-29 931-351 0XXX2XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ESTILL SPG TN
2016-03-18 931-441 0XXX1XXX2XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TN 525E LYNNVILLE TN
2016-03-14 931-567 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TN 525E CULLEOKA TN
2016-03-11 931-616 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E MANCHESTER TN
2016-02-24 931-414 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MCMINNVL 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.