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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2013-10-07 423-805-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2013-10-02 423-999-8XXX 8000–8999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2013-09-24 423-480-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KINGSPORT TN
2013-09-24 423-480-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KINGSPORT TN
2013-09-20 423-449-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J LAFOLLETTE TN
2013-09-12 423-805-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TN 4806 CHATTNOOGA TN
2013-09-09 423-805-2XXX 2000–2999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2013-09-09 423-805-3XXX 3000–3999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2013-09-06 423-415-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NEWPORT TN
2013-09-06 423-430-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2013-08-28 423-999-7XXX 7000–7999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2013-08-23 423-458-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CLEVELAND TN
2013-08-13 423-268-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2013-08-13 423-377-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 LAFOLLETTE TN
2013-07-31 423-385-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHATTNOOGA TN
2013-07-24 423-458-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2013-07-11 423-742-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TN 4806 BRISTOL TN
2013-07-09 423-268-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2013-07-09 423-271-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 SWEETWATER TN
2013-07-08 423-664-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2013-07-08 423-664-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2013-07-02 423-355-5XXX 5000–5999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2013-07-02 423-760-8XXX 8000–8999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2013-07-01 423-939-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J JASPER TN
2013-06-26 423-353-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TN 4806 MORRISTOWN TN
2013-06-24 423-800-8XXX 8000–8999Assigned ONVOY, LLC - TN 525E CHATTNOOGA TN
2013-06-21 423-458-3XXX 3000–3999Assigned ONVOY, LLC - TN 525E CLEVELAND TN
2013-06-21 423-491-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JOHNSON CY TN
2013-06-21 423-529-1XXX 1000–1999Assigned ONVOY, LLC - TN 525E GEORGETOWN TN
2013-06-17 423-805-1XXX 1000–1999Assigned ONVOY, LLC - TN 525E CHATTNOOGA TN
2013-06-10 423-268-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2013-06-10 423-321-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2013-05-29 423-815-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F WHITWELL TN
2013-05-22 423-207-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MIDWAY TN
2013-05-21 423-347-8XXX 8000–8999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ROGERSVL TN
2013-05-14 423-602-8XXX 8000–8999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2013-05-14 423-602-9XXX 9000–9999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2013-05-09 423-599-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2013-04-24 423-270-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ERWIN TN
2013-04-19 423-328-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J JOHNSON CY TN
2013-04-19 423-415-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NEWPORT TN
2013-04-15 423-999-6XXX 6000–6999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2013-04-12 423-516-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 SULIVNGDNS TN
2013-04-05 423-458-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F CLEVELAND TN
2013-04-03 423-390-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F KINGSPORT TN
2013-03-29 423-436-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MADISONVL TN
2013-03-26 423-300-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 SNEEDVILLE TN
2013-03-13 423-430-1XXX 1000–1999Assigned NUSO, LLC 551G JOHNSON CY TN
2013-03-12 423-800-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 CHATTNOOGA TN
2013-03-12 423-999-5XXX 5000–5999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS 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.