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
2021-04-07 341-900-1XXX 1000–1999Assigned IP HORIZON LLC 515J CROCKETT CA
2021-04-07 341-946-0XXX 0000–0999Assigned IP HORIZON LLC 515J OKLD BKLY CA
2021-04-01 341-400-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD FRTVL CA
2021-03-24 341-201-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2021-03-24 341-201-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2021-03-24 341-345-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2021-03-24 341-888-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2021-03-22 341-345-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-03-22 341-345-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-03-22 341-345-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRNK MAIN CA
2021-03-22 341-345-4XXX 4000–4999Assigned METROPCS, INC. 5562 FRNK MAIN CA
2021-03-18 341-500-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2021-03-09 341-500-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 341-500-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-09 341-500-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2021-03-04 341-200-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2021-03-04 341-200-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2021-03-01 341-400-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-03-01 341-400-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-03-01 341-400-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-02-22 341-345-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-02-22 341-345-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-02-22 341-345-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-02-22 341-345-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-02-22 341-465-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-02-22 341-529-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2021-02-22 341-766-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2021-02-22 341-766-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2021-02-22 341-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H OKLD BKLY CA
2021-02-18 341-226-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2021-02-18 341-226-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2021-02-18 341-336-1XXX 1000–1999Assigned METROPCS, INC. 5562 FRNK GRNLF CA
2021-02-18 341-666-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2021-02-17 341-465-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2021-02-17 341-465-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2021-02-17 341-465-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2021-02-17 341-465-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2021-02-16 341-345-6XXX 6000–6999Assigned FRACTEL, LLC 965H FRNK MAIN CA
2021-02-03 341-234-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2021-02-03 341-234-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2021-02-03 341-234-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2021-02-03 341-234-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2021-02-03 341-234-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2021-01-27 341-444-0XXX 0000–0999Assigned TELNYX LLC 073H CROCKETT CA
2021-01-27 341-465-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-01-27 341-465-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-01-27 341-465-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-01-27 341-465-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-01-25 341-900-9XXX 9000–9999Assigned FRACTEL, LLC 965H CROCKETT CA
2021-01-20 341-201-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FRNK OLIVR 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.