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
2007-03-12 423-343-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 KINGSPORT TN
2007-03-12 423-343-3XXX 3000–3999Assigned METROPCS, INC. 5562 KINGSPORT TN
2007-03-12 423-343-6XXX 6000–6999Assigned METROPCS, INC. 5562 KINGSPORT TN
2007-03-12 423-451-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SODDYDAISY TN
2007-03-12 423-463-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-03-12 423-463-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-03-12 423-557-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 JOHNSON CY TN
2007-03-12 423-765-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KINGSPORT TN
2007-03-12 423-790-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2007-02-28 423-305-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHATTNOOGA TN
2007-02-28 423-305-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHATTNOOGA TN
2007-02-28 423-606-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ENGLEWOOD TN
2007-02-28 423-730-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J RICEVILLE TN
2007-02-26 423-217-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 BRISTOL TN
2007-02-26 423-278-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 GREENEVL TN
2007-02-26 423-535-0XXX 0000–0999Assigned POWERTEL ATLANTA LICENSES, INC. 7473 CHATTNOOGA TN
2007-02-26 423-765-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 KINGSPORT TN
2007-02-21 423-291-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOUNTAINCY TN
2007-02-21 423-489-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CUMBERLDGP TN
2007-02-20 423-453-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ATHENS TN
2007-02-20 423-781-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ETOWAH TN
2007-02-12 423-201-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFOLLETTE TN
2007-02-12 423-223-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ONEIDA TN
2007-02-12 423-293-5XXX 5000–5999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 ROGERSVL TN
2007-02-09 423-277-5XXX 5000–5999Assigned POWERTEL NASHVILLE LICENSES, INC. 7476 MORRISTOWN TN
2007-02-09 423-388-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ERWIN TN
2007-02-09 423-790-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 CLEVELAND TN
2007-02-06 423-307-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MORRISTOWN TN
2007-02-06 423-435-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ATHENS TN
2007-02-06 423-463-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-02-06 423-463-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-02-06 423-463-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-02-05 423-307-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MORRISTOWN TN
2007-02-05 423-465-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN 7278 NEWPORT TN
2007-02-01 423-367-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KINGSPORT TN
2007-02-01 423-367-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KINGSPORT TN
2007-01-29 423-558-0XXX 0000–0999Assigned ONVOY, LLC - TN 525E CHATTNOOGA TN
2007-01-25 423-285-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DAYTON TN
2007-01-22 423-262-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JOHNSON CY TN
2007-01-09 423-217-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BRISTOL TN
2007-01-09 423-489-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CUMBERLDGP TN
2007-01-09 423-723-5XXX 5000–5999Assigned METROPCS, INC. 5562 KINGSPORT TN
2007-01-09 423-723-7XXX 7000–7999Assigned METROPCS, INC. 5562 KINGSPORT TN
2007-01-08 423-463-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-01-08 423-463-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-01-08 423-463-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CHATTNOOGA TN
2007-01-04 423-244-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2007-01-04 423-293-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ROGERSVL TN
2007-01-04 423-765-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KINGSPORT TN
2007-01-04 423-836-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 SWEETWATER 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.