NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

11 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 281
ONVOY, LLC - TX 10
EXIANT COMMUNICATIONS 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
2005-01-28 281-668-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2005-01-28 281-668-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2005-01-27 281-394-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2005-01-27 281-761-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLEVELAND TX
2005-01-27 281-915-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARCOLA TX
2005-01-27 281-968-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ALVIN TX
2005-01-20 281-303-9XXX 9000–9999Assigned METROPCS, INC. 5562 BEACH CITY TX
2005-01-13 281-229-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2005-01-12 281-201-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SUGAR LAND TX
2005-01-05 281-205-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TOMBALL TX
2005-01-05 281-456-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHELDON TX
2005-01-03 281-622-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CLEVELAND TX
2005-01-03 281-853-6XXX 6000–6999Assigned METROPCS, INC. 5562 APOLLO TX
2005-01-03 281-853-7XXX 7000–7999Assigned METROPCS, INC. 5562 APOLLO TX
2004-12-29 281-241-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DEER PARK TX
2004-12-29 281-816-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FRIENDSWD TX
2004-12-29 281-973-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUMBLE TX
2004-12-21 281-823-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 APOLLO TX
2004-12-21 281-823-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 APOLLO TX
2004-12-07 281-892-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C HSTNSUBURB TX
2004-12-06 281-825-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C SPRING TX
2004-11-18 281-271-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 DEER PARK TX
2004-11-15 281-709-7XXX 7000–7999Assigned METROPCS, INC. 5562 APOLLO TX
2004-11-11 281-528-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPRING TX
2004-11-11 281-751-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MONTBLVIEU TX
2004-11-08 281-657-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2004-11-08 281-657-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2004-11-02 281-670-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX
2004-11-01 281-709-5XXX 5000–5999Assigned METROPCS, INC. 5562 APOLLO TX
2004-10-19 281-324-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUFFMAN TX
2004-10-19 281-336-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KEMAH TX
2004-10-08 281-669-0XXX 0000–0999Assigned ONVOY, LLC - TX 903C HOUSTON TX
2004-10-08 281-710-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARCOLA TX
2004-09-28 281-466-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2004-09-28 281-709-3XXX 3000–3999Assigned METROPCS, INC. 5562 APOLLO TX
2004-09-01 281-668-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2004-08-27 281-667-5XXX 5000–5999Assigned METROPCS, INC. 5562 APOLLO TX
2004-08-17 281-305-5XXX 5000–5999Assigned ONVOY, LLC - TX 903C PINEHURST TX
2004-08-17 281-803-5XXX 5000–5999Assigned ONVOY, LLC - TX 903C TOMBALL TX
2004-08-13 281-570-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HUMBLE TX
2004-08-13 281-733-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2004-08-03 281-206-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BARKER TX
2004-08-03 281-214-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 WESTFIELD TX
2004-08-03 281-656-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 LANGHAMCRK TX
2004-08-03 281-862-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 CHANNELVW TX
2004-08-02 281-667-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 APOLLO TX
2004-07-15 281-907-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SPRING TX
2004-07-14 281-226-0XXX 0000–0999Assigned METROPCS, INC. 5562 APOLLO TX
2004-07-14 281-226-3XXX 3000–3999Assigned METROPCS, INC. 5562 APOLLO TX
2004-07-06 281-372-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX

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.