NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

15 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 341
ONVOY, LLC - CA 8
NEW CINGULAR WIRELESS PCS, LLC 3
BANDWIDTH.COM CLEC, LLC - CA 3
SONIC TELECOM, LLC - CA 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
2025-11-28 341-259-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-11-28 341-259-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-11-28 341-265-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-11-14 341-240-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HAYWARD CA
2025-11-04 341-300-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2025-10-17 341-244-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD TRNID CA
2025-10-17 341-263-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-10-17 341-263-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-10-16 341-264-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2025-10-02 341-239-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD ALMD CA
2025-10-02 341-239-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD ALMD CA
2025-10-02 341-263-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2025-10-02 341-264-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2025-10-02 341-264-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2025-09-11 341-867-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2025-09-03 341-257-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2025-09-03 341-257-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2025-09-03 341-257-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2025-08-22 341-244-3XXX 3000–3999Assigned SONIC TELECOM, LLC - CA 433E OKLD TRNID CA
2025-08-22 341-260-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HAYWARD CA
2025-08-22 341-260-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HAYWARD CA
2025-08-06 341-237-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD BKLY CA
2025-08-05 341-232-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J HAYWARD CA
2025-07-28 341-232-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2025-07-03 341-388-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J RICHMOND CA
2025-05-28 341-223-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD ALMD CA
2025-05-16 341-252-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-05-16 341-257-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-05-16 341-257-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-05-16 341-257-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-05-16 341-259-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-05-16 341-259-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-05-16 341-259-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-04-24 341-253-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2025-04-24 341-253-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2025-04-07 341-261-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRNK GRNLF CA
2025-03-28 341-259-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-03-28 341-259-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-03-28 341-259-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2025-03-06 341-666-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD TRNID CA
2025-02-18 341-259-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELSBR-PINL CA
2025-01-31 341-257-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-01-31 341-257-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2025-01-15 341-254-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2025-01-13 341-260-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2025-01-13 341-260-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2025-01-13 341-260-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2025-01-13 341-260-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2025-01-13 341-260-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2025-01-13 341-260-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA

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.