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
2021-06-17 341-200-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2021-06-17 341-200-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2021-06-17 341-348-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2021-06-17 341-348-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2021-06-17 341-348-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2021-06-17 341-348-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2021-06-17 341-388-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2021-06-17 341-388-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2021-06-17 341-500-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2021-06-17 341-500-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2021-06-17 341-500-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2021-06-17 341-500-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2021-06-17 341-900-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2021-06-16 341-388-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2021-06-15 341-348-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-06-15 341-348-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-06-15 341-348-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-06-15 341-348-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-06-14 341-201-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRNK OLIVR CA
2021-06-03 341-386-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-06-03 341-386-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-06-03 341-386-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-06-03 341-386-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-05-28 341-234-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2021-05-28 341-234-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2021-05-28 341-348-0XXX 0000–0999Assigned TELNYX LLC 073H FRNK MAIN CA
2021-05-28 341-895-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2021-05-21 341-299-0XXX 0000–0999Assigned SONIC TELECOM, LLC - CA 433E OKLD TRNID CA
2021-05-15 341-758-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-05-15 341-758-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-05-15 341-758-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-05-15 341-758-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-05-15 341-758-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2021-05-09 341-336-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2021-05-09 341-336-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2021-05-08 341-234-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD ALMD CA
2021-04-19 341-299-9XXX 9000–9999Assigned FRACTEL, LLC 965H OKLD TRNID CA
2021-04-19 341-388-8XXX 8000–8999Assigned FRACTEL, LLC 965H RICHMOND CA
2021-04-19 341-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H OKLD FRTVL CA
2021-04-18 341-348-6XXX 6000–6999Assigned FRACTEL, LLC 965H FRNK MAIN CA
2021-04-18 341-386-3XXX 3000–3999Assigned FRACTEL, LLC 965H HAYWARD CA
2021-04-12 341-777-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2021-04-07 341-200-7XXX 7000–7999Assigned IP HORIZON LLC 515J HRCUL-RODE CA
2021-04-07 341-201-1XXX 1000–1999Assigned IP HORIZON LLC 515J FRNK OLIVR CA
2021-04-07 341-226-7XXX 7000–7999Assigned IP HORIZON LLC 515J OKLD FRTVL CA
2021-04-07 341-226-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2021-04-07 341-234-9XXX 9000–9999Assigned IP HORIZON LLC 515J OKLD ALMD CA
2021-04-07 341-314-9XXX 9000–9999Assigned IP HORIZON LLC 515J ELSBR-PINL CA
2021-04-07 341-336-2XXX 2000–2999Assigned IP HORIZON LLC 515J FRNK GRNLF CA
2021-04-07 341-400-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL 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.