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
2020-10-15 341-336-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2020-10-15 341-336-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2020-10-15 341-336-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2020-10-15 341-666-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2020-10-15 341-666-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2020-10-13 341-600-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-10-13 341-600-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-10-09 341-895-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD ALMD CA
2020-10-02 341-766-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2020-09-29 341-226-1XXX 1000–1999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2020-09-29 341-226-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2020-09-29 341-777-3XXX 3000–3999Assigned METROPCS, INC. 5562 HAYWARD CA
2020-09-29 341-777-4XXX 4000–4999Assigned METROPCS, INC. 5562 HAYWARD CA
2020-09-29 341-895-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2020-09-29 341-895-3XXX 3000–3999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2020-09-18 341-444-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CROCKETT CA
2020-09-18 341-529-9XXX 9000–9999Assigned FRACTEL, LLC 965H FRNK MAIN CA
2020-09-17 341-300-0XXX 0000–0999Assigned FRACTEL, LLC 965H RICHMOND CA
2020-09-17 341-300-3XXX 3000–3999Assigned FRACTEL, LLC 965H RICHMOND CA
2020-09-16 341-400-0XXX 0000–0999Assigned FRACTEL, LLC 965H OKLD FRTVL CA
2020-09-16 341-400-4XXX 4000–4999Assigned FRACTEL, LLC 965H OKLD FRTVL CA
2020-09-16 341-529-3XXX 3000–3999Assigned FRACTEL, LLC 965H FRNK MAIN CA
2020-09-14 341-799-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2020-09-14 341-799-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2020-09-14 341-800-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-09-14 341-800-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-09-14 341-800-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-09-09 341-600-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-09-09 341-600-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-09-02 341-222-6XXX 6000–6999Assigned TELNYX LLC 073H OKLD FRTVL CA
2020-08-25 341-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H ELSBR-PINL CA
2020-08-25 341-600-6XXX 6000–6999Assigned FRACTEL, LLC 965H ELSBR-PINL CA
2020-08-21 341-356-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2020-08-11 341-222-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD FRTVL CA
2020-08-11 341-226-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2020-08-11 341-666-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD TRNID CA
2020-08-11 341-766-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD BKLY CA
2020-08-07 341-222-0XXX 0000–0999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2020-08-07 341-356-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2020-08-07 341-356-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2020-08-07 341-356-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2020-08-07 341-356-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2020-08-07 341-777-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2020-08-07 341-799-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2020-08-07 341-799-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2020-07-31 341-444-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2020-07-31 341-444-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2020-07-10 341-356-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2020-07-10 341-356-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2020-07-02 341-200-0XXX 0000–0999Assigned FRACTEL, LLC 965H HRCUL-RODE 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.