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
2005-12-06 281-305-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PINEHURST TX
2005-12-06 281-306-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPLENDORA TX
2005-12-06 281-306-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPLENDORA TX
2005-12-06 281-346-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 VLY LODGE TX
2005-12-06 281-571-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SATSUMA TX
2005-12-06 281-571-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SATSUMA TX
2005-12-06 281-764-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUFFMAN TX
2005-12-06 281-909-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SEABROOK TX
2005-12-06 281-909-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SEABROOK TX
2005-11-30 281-882-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2005-11-28 281-823-2XXX 2000–2999Assigned METROPCS, INC. 5562 APOLLO TX
2005-11-14 281-500-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LANGHAMCRK TX
2005-11-14 281-644-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2005-11-14 281-656-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LANGHAMCRK TX
2005-11-14 281-678-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2005-11-14 281-712-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2005-11-14 281-712-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2005-11-09 281-570-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HUMBLE TX
2005-11-09 281-691-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2005-10-21 281-203-2XXX 2000–2999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2005-10-18 281-377-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BAMMEL TX
2005-10-18 281-377-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BAMMEL TX
2005-10-18 281-678-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2005-10-13 281-691-2XXX 2000–2999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2005-10-11 281-436-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HSTNSUBURB TX
2005-10-11 281-436-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HSTNSUBURB TX
2005-09-27 281-402-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 LA PORTE TX
2005-09-23 281-258-1XXX 1000–1999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-258-3XXX 3000–3999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-258-7XXX 7000–7999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-282-7XXX 7000–7999Assigned METROPCS, INC. 5562 APOLLO TX
2005-09-23 281-594-0XXX 0000–0999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-594-1XXX 1000–1999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-594-2XXX 2000–2999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-594-3XXX 3000–3999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-594-4XXX 4000–4999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-594-6XXX 6000–6999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-594-9XXX 9000–9999Assigned METROPCS, INC. 5562 HSTNSUBURB TX
2005-09-23 281-668-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2005-09-23 281-683-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2005-09-23 281-940-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2005-09-23 281-940-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2005-09-23 281-940-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2005-09-20 281-789-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PINEHURST TX
2005-09-19 281-883-2XXX 2000–2999Assigned METROPCS, INC. 5562 HUMBLE TX
2005-09-16 281-309-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2005-09-13 281-683-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2005-09-12 281-751-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MONTBLVIEU TX
2005-09-08 281-462-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CROSBY TX
2005-09-08 281-652-7XXX 7000–7999Assigned AERIAL COMMUNICATIONS, INC. 6701 HOUSTON 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.