NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

13 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2007-07-19 423-817-9XXX 9000–9999Assigned METROPCS, INC. 5562 KINGSPORT TN
2007-07-11 423-208-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-07-11 423-381-2XXX 2000–2999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2007-07-11 423-437-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 LAFOLLETTE TN
2007-07-11 423-782-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KINGSPORT TN
2007-07-11 423-895-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ELIZABTHTN TN
2007-06-27 423-252-9XXX 9000–9999Assigned UNITED STATES CELLULAR - TN 6278 ATHENS TN
2007-06-19 423-208-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-06-19 423-208-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-06-19 423-208-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-06-19 423-278-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 GREENEVL TN
2007-06-19 423-790-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2007-06-19 423-833-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2007-06-19 423-839-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MORRISTOWN TN
2007-06-06 423-277-7XXX 7000–7999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 MORRISTOWN TN
2007-05-24 423-330-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ERWIN TN
2007-05-24 423-702-7XXX 7000–7999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2007-05-24 423-702-8XXX 8000–8999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2007-05-16 423-994-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHATTNOOGA TN
2007-05-11 423-343-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TN 4806 KINGSPORT TN
2007-05-11 423-790-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CLEVELAND TN
2007-05-04 423-208-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-05-04 423-790-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2007-04-27 423-584-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLEVELAND TN
2007-04-27 423-723-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KINGSPORT TN
2007-04-25 423-765-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KINGSPORT TN
2007-04-25 423-839-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MORRISTOWN TN
2007-04-12 423-208-2XXX 2000–2999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-04-12 423-208-3XXX 3000–3999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-04-12 423-693-6XXX 6000–6999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-04-12 423-693-7XXX 7000–7999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-04-12 423-693-8XXX 8000–8999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-04-12 423-693-9XXX 9000–9999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-04-11 423-693-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-04-11 423-693-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-04-11 423-693-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-04-05 423-693-2XXX 2000–2999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2007-04-05 423-847-4XXX 4000–4999Assigned ELECTRIC POWER BOARD OF CHATTANOOGA 4645 CHATTNOOGA TN
2007-04-02 423-957-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 HAMPTON TN
2007-03-30 423-297-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 ELIZABTHTN TN
2007-03-30 423-790-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CLEVELAND TN
2007-03-30 423-948-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 LIMESTONE TN
2007-03-23 423-291-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 MOUNTAINCY TN
2007-03-22 423-923-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL TN
2007-03-21 423-600-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J APISON TN
2007-03-21 423-615-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J COLLEGEDL TN
2007-03-21 423-910-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J OOLTEWAH TN
2007-03-20 423-262-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2007-03-12 423-299-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BENTON TN
2007-03-12 423-333-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ATHENS TN

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.