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
2019-02-11 281-713-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2019-02-08 281-505-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 KATY TX
2019-02-04 281-562-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAMMEL TX
2019-01-21 281-219-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2019-01-21 281-219-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2019-01-11 281-572-0XXX 0000–0999Assigned ONVOY, LLC - TX 903C PORTER HTS TX
2019-01-11 281-572-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C PORTER HTS TX
2019-01-10 281-562-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2019-01-10 281-562-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2019-01-10 281-562-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2019-01-10 281-562-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2019-01-10 281-562-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2019-01-03 281-271-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEER PARK TX
2018-11-15 281-648-6XXX 6000–6999Assigned IP HORIZON LLC 515J FRIENDSWD TX
2018-11-15 281-648-8XXX 8000–8999Assigned IP HORIZON LLC 515J FRIENDSWD TX
2018-11-14 281-752-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-11-14 281-870-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-11-07 281-721-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D HSTNSUBURB TX
2018-11-01 281-721-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HSTNSUBURB TX
2018-10-31 281-502-5XXX 5000–5999Assigned ONVOY, LLC - TX 903C HIGHLANDS TX
2018-10-31 281-502-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C HIGHLANDS TX
2018-10-23 281-369-8XXX 8000–8999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F ROSHARON TX
2018-10-23 281-688-4XXX 4000–4999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F HIGHLANDS TX
2018-10-09 281-651-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2018-10-04 281-369-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 ROSHARON TX
2018-09-07 281-595-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F ROSHARON TX
2018-08-28 281-688-1XXX 1000–1999Assigned ONVOY, LLC - TX 903C HIGHLANDS TX
2018-08-28 281-688-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C HIGHLANDS TX
2018-08-28 281-767-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C ROSHARON TX
2018-08-28 281-767-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C ROSHARON TX
2018-08-22 281-324-8XXX 8000–8999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F HUFFMAN TX
2018-08-22 281-595-8XXX 8000–8999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F ROSHARON TX
2018-08-22 281-990-4XXX 4000–4999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F APOLLO TX
2018-08-20 281-767-9XXX 9000–9999Assigned TELNYX LLC 073H ROSHARON TX
2018-08-06 281-843-5XXX 5000–5999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F HIGHLANDS TX
2018-07-20 281-939-6XXX 6000–6999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2018-07-20 281-939-7XXX 7000–7999Assigned AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2018-06-13 281-462-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CROSBY TX
2018-06-06 281-843-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C HIGHLANDS TX
2018-04-30 281-503-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F PORTER HTS TX
2018-04-30 281-623-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HUMBLE TX
2018-03-22 281-623-6XXX 6000–6999Assigned METROPCS, INC. 5562 HUMBLE TX
2018-03-22 281-623-7XXX 7000–7999Assigned METROPCS, INC. 5562 HUMBLE TX
2018-03-22 281-623-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2018-03-21 281-462-5XXX 5000–5999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F CROSBY TX
2018-03-19 281-502-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C HIGHLANDS TX
2018-03-19 281-623-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C HUMBLE TX
2018-03-19 281-666-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C CROSBY TX
2018-03-07 281-939-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F SPRING TX
2018-03-05 281-502-8XXX 8000–8999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F HIGHLANDS 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.