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
2023-09-25 341-230-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RICHMOND CA
2023-09-25 341-237-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2023-09-19 341-239-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2023-09-19 341-239-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2023-09-18 341-895-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2023-08-23 341-231-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-08-23 341-231-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-08-23 341-231-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-08-17 341-237-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2023-08-17 341-237-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2023-08-17 341-238-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2023-08-17 341-238-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2023-08-17 341-238-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2023-08-04 341-235-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-235-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-236-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 341-236-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-07-25 341-230-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2023-07-25 341-230-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2023-07-25 341-230-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2023-07-13 341-233-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-07-13 341-233-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-07-13 341-233-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-07-12 341-225-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2023-07-12 341-225-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2023-07-12 341-225-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2023-07-12 341-225-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2023-07-12 341-232-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2023-07-07 341-688-7XXX 7000–7999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2023-06-22 341-227-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2023-06-22 341-227-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2023-06-22 341-227-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2023-06-22 341-227-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2023-06-22 341-232-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C 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.