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
2006-09-25 281-740-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2006-09-25 281-740-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2006-09-25 281-740-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2006-09-19 281-838-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BAYTOWN TX
2006-09-18 281-724-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LEAGUECITY TX
2006-09-12 281-605-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-12 281-605-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-12 281-605-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-12 281-605-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-07 281-605-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-07 281-605-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-07 281-605-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2006-09-06 281-690-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUGAR LAND TX
2006-09-06 281-690-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUGAR LAND TX
2006-09-01 281-691-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 BAYTOWN TX
2006-09-01 281-724-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 LEAGUECITY TX
2006-08-31 281-690-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 SUGAR LAND TX
2006-08-31 281-690-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 SUGAR LAND TX
2006-08-31 281-825-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2006-08-29 281-601-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PORTER TX
2006-08-29 281-651-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SPRING TX
2006-08-25 281-203-1XXX 1000–1999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-08-25 281-203-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-08-25 281-210-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-08-25 281-907-2XXX 2000–2999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-08-25 281-907-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-08-24 281-608-1XXX 1000–1999Assigned METROPCS, INC. 5562 HUMBLE TX
2006-08-24 281-608-9XXX 9000–9999Assigned METROPCS, INC. 5562 HUMBLE TX
2006-08-22 281-760-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2006-08-22 281-760-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2006-08-21 281-712-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 KATY TX
2006-08-16 281-761-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLEVELAND TX
2006-08-14 281-633-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICHMNRNBG TX
2006-08-11 281-839-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BAYTOWN TX
2006-08-08 281-318-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-318-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-348-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-348-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-964-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-964-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-964-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-08 281-964-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2006-08-01 281-459-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2006-08-01 281-864-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 CHANNELVW TX
2006-07-31 281-203-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-07-31 281-323-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-07-31 281-323-5XXX 5000–5999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-07-31 281-323-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2006-07-27 281-710-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARCOLA TX
2006-07-27 281-840-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 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.