NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

13 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 423
NEW CINGULAR WIRELESS PCS, LLC - GA 3
BANDWIDTH.COM CLEC, LLC - TN 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 2
AHOI LLC 2
TELNYX LLC 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-11-19 423-295-9XXX 9000–9999Assigned ONVOY, LLC - TN 525E BALL PLAY TN
2019-11-19 423-730-3XXX 3000–3999Assigned ONVOY, LLC - TN 525E RICEVILLE TN
2019-11-14 423-528-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F BAILEYTON TN
2019-11-08 423-604-0XXX 0000–0999Assigned TELNYX LLC 073H ETOWAH TN
2019-11-01 423-380-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F CLEVELAND TN
2019-10-25 423-216-1XXX 1000–1999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 BENTON TN
2019-10-25 423-658-4XXX 4000–4999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 WHITWELL TN
2019-10-21 423-427-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2019-10-21 423-427-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2019-10-21 423-564-7XXX 7000–7999Assigned ONVOY, LLC - TN 525E ROGERSVL TN
2019-10-11 423-206-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2019-10-11 423-206-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2019-10-11 423-206-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2019-10-02 423-219-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F CHARLESTON TN
2019-10-02 423-219-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F CHARLESTON TN
2019-10-02 423-515-5XXX 5000–5999Assigned ONVOY, LLC - TN 525E SO PITTSBG TN
2019-10-02 423-515-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E SO PITTSBG TN
2019-10-02 423-919-8XXX 8000–8999Assigned ONVOY, LLC - TN 525E NEWTAZWELL TN
2019-10-02 423-919-9XXX 9000–9999Assigned ONVOY, LLC - TN 525E NEWTAZWELL TN
2019-09-30 423-382-6XXX 6000–6999Assigned COMMIO, LLC 939H SNEEDVILLE TN
2019-09-30 423-456-3XXX 3000–3999Assigned ONVOY, LLC - TN 525E LAFOLLETTE TN
2019-09-25 423-379-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NEWPORT TN
2019-09-19 423-603-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORK RIDGE TN
2019-09-19 423-603-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORK RIDGE TN
2019-09-13 423-556-3XXX 3000–3999Assigned ONVOY, LLC - TN 525E SODDYDAISY TN
2019-09-13 423-556-4XXX 4000–4999Assigned ONVOY, LLC - TN 525E SODDYDAISY TN
2019-09-13 423-604-3XXX 3000–3999Assigned ONVOY, LLC - TN 525E ETOWAH TN
2019-09-13 423-604-4XXX 4000–4999Assigned ONVOY, LLC - TN 525E ETOWAH TN
2019-09-09 423-466-0XXX 0000–0999Assigned TWIN LAKES COMMUNICATIONS, INC. - TN 204G ATHENS TN
2019-09-03 423-812-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENEVL TN
2019-08-29 423-379-2XXX 2000–2999Assigned ONVOY, LLC - TN 525E NEWPORT TN
2019-08-23 423-524-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2019-08-23 423-524-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2019-08-23 423-524-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2019-08-14 423-459-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F CHATTNOOGA TN
2019-08-02 423-910-4XXX 4000–4999Assigned ONVOY, LLC - TN 525E OOLTEWAH TN
2019-07-31 423-441-4XXX 4000–4999Assigned ONVOY, LLC - TN 525E CUMBERLDGP TN
2019-07-31 423-603-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E FORK RIDGE TN
2019-07-30 423-259-4XXX 4000–4999Assigned ONVOY, LLC - TN 525E NEWTAZWELL TN
2019-07-30 423-600-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E APISON TN
2019-07-30 423-615-4XXX 4000–4999Assigned ONVOY, LLC - TN 525E COLLEGEDL TN
2019-07-19 423-594-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DAYTON TN
2019-07-19 423-594-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DAYTON TN
2019-07-19 423-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H CHATTNOOGA TN
2019-07-12 423-594-4XXX 4000–4999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 DAYTON TN
2019-07-11 423-590-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2019-07-11 423-590-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2019-07-11 423-590-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2019-07-11 423-590-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2019-07-11 423-590-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.