NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

23 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 737
ONVOY, LLC - TX 14
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 4
NEW CINGULAR WIRELESS PCS, LLC - IL 2
EXIANT COMMUNICATIONS LLC 1
BANDWIDTH.COM CLEC, LLC - TX 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
2017-08-18 737-218-4XXX 4000–4999Assigned GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 AUSTIN TX
2017-08-17 737-218-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-08-17 737-218-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-08-17 737-220-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-08-17 737-220-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-08-17 737-220-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-08-17 737-220-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-08-17 737-220-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-08-17 737-220-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-08-16 737-241-0XXX 0000–0999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-1XXX 1000–1999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-5XXX 5000–5999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-16 737-241-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-08-15 737-218-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-08-15 737-218-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-08-15 737-218-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-08-15 737-218-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AUSTIN TX
2017-08-09 737-208-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-07-28 737-216-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K TAYLOR TX
2017-07-28 737-757-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 LEANDER TX
2017-07-28 737-881-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K BASTROP TX
2017-07-20 737-221-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2017-07-10 737-248-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 KYLE TX
2017-07-06 737-220-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D AUSTIN TX
2017-07-06 737-220-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D AUSTIN TX
2017-06-30 737-219-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-06-30 737-931-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-06-23 737-216-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TAYLOR TX
2017-06-22 737-843-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K LEANDER TX
2017-06-16 737-218-1XXX 1000–1999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F AUSTIN TX
2017-06-15 737-219-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-06-15 737-219-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-06-15 737-219-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-06-15 737-219-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-06-12 737-216-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2017-06-12 737-216-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2017-06-05 737-414-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C BUDA TX
2017-06-05 737-666-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C ELGIN TX
2017-05-31 737-225-2XXX 2000–2999Assigned METROPCS, INC. 5562 ROCKDALE TX
2017-05-31 737-225-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROCKDALE TX
2017-05-31 737-225-7XXX 7000–7999Assigned METROPCS, INC. 5562 ROCKDALE TX
2017-05-31 737-402-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2017-05-12 737-213-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2017-05-12 737-213-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2017-05-02 737-618-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F LAMPASAS TX
2017-04-20 737-214-0XXX 0000–0999Assigned ONVOY, LLC - TX 903C SAN MARCOS 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.