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
2023-06-22 341-342-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2023-06-13 341-228-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-228-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-228-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-228-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-228-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-228-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-233-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-233-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-233-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-13 341-786-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2023-06-05 341-512-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2023-06-05 341-688-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2023-06-05 341-688-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2023-05-25 341-225-0XXX 0000–0999Assigned TELNYX LLC 073H FRNK GRNLF CA
2023-05-16 341-231-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J ELSBR-PINL CA
2023-05-12 341-225-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-05-12 341-225-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-05-12 341-227-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-05-12 341-227-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-05-12 341-232-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2023-05-12 341-232-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2023-05-09 341-221-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HAYWARD CA
2023-05-08 341-231-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-05-08 341-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-05-08 341-231-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-04-12 341-230-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2023-04-11 341-218-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2023-04-11 341-218-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2023-04-07 341-344-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2023-04-07 341-344-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2023-03-30 341-229-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2023-03-06 341-218-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2023-02-17 341-228-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-02-17 341-228-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-02-17 341-228-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-02-17 341-228-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-02-15 341-218-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2023-02-15 341-225-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-02-15 341-225-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-02-15 341-225-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-02-15 341-227-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-02-15 341-227-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-02-15 341-227-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-01-27 341-224-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2023-01-27 341-224-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2023-01-27 341-224-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2023-01-05 341-223-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2023-01-05 341-223-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2022-12-12 341-224-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN 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.