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
2018-10-01 423-370-3XXX 3000–3999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-370-4XXX 4000–4999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-370-6XXX 6000–6999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-370-7XXX 7000–7999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-370-8XXX 8000–8999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-466-6XXX 6000–6999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-466-7XXX 7000–7999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-717-1XXX 1000–1999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-856-3XXX 3000–3999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-856-4XXX 4000–4999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-10-01 423-856-5XXX 5000–5999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2018-09-27 423-541-4XXX 4000–4999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2018-09-27 423-541-5XXX 5000–5999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2018-09-27 423-541-6XXX 6000–6999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2018-09-27 423-583-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SULIVNGDNS TN
2018-09-24 423-250-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F CLEVELAND TN
2018-09-24 423-250-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F CLEVELAND TN
2018-09-19 423-225-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F BENTON TN
2018-09-19 423-225-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F BENTON TN
2018-09-19 423-225-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F BENTON TN
2018-09-19 423-403-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2018-09-19 423-403-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2018-09-19 423-403-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2018-09-19 423-417-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F CHATTNOOGA TN
2018-09-19 423-961-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F GEORGETOWN TN
2018-09-11 423-205-8XXX 8000–8999Assigned TELNYX LLC 073H ETOWAH TN
2018-09-11 423-235-8XXX 8000–8999Assigned TELNYX LLC 073H BULLS GAP TN
2018-09-11 423-376-8XXX 8000–8999Assigned TELNYX LLC 073H MADISONVL TN
2018-09-11 423-382-1XXX 1000–1999Assigned TELNYX LLC 073H SNEEDVILLE TN
2018-09-11 423-818-8XXX 8000–8999Assigned TELNYX LLC 073H JELLICO TN
2018-08-31 423-556-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SODDYDAISY TN
2018-08-31 423-565-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F DECATUR TN
2018-08-31 423-797-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BRISTOL TN
2018-08-23 423-225-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F BENTON TN
2018-08-23 423-225-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F BENTON TN
2018-08-23 423-445-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SURGOINSVL TN
2018-08-23 423-500-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F ROGERSVL TN
2018-08-22 423-403-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2018-08-22 423-403-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F SO PITTSBG TN
2018-08-21 423-251-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F KINGSPORT TN
2018-08-21 423-897-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F FALLBRANCH TN
2018-08-17 423-560-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E ERWIN TN
2018-08-17 423-560-7XXX 7000–7999Assigned ONVOY, LLC - TN 525E ERWIN TN
2018-08-17 423-770-7XXX 7000–7999Assigned ONVOY, LLC - TN 525E CHURCHHILL TN
2018-08-17 423-770-8XXX 8000–8999Assigned ONVOY, LLC - TN 525E CHURCHHILL TN
2018-08-14 423-418-5XXX 5000–5999Assigned ONVOY, LLC - TN 525E MIDWAY SUL TN
2018-08-14 423-418-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E MIDWAY SUL TN
2018-08-14 423-427-6XXX 6000–6999Assigned ONVOY, LLC - TN 525E JOHNSON CY TN
2018-08-14 423-427-7XXX 7000–7999Assigned ONVOY, LLC - TN 525E JOHNSON CY TN
2018-08-14 423-616-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MORRISTOWN 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.