NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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 661
ONVOY, LLC - CA 10
TELEPORT COMMUNICATIONS AMERICA, LLC - CA 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 3
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
2018-08-16 661-439-8XXX 8000–8999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-08-16 661-439-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-08-14 661-407-0XXX 0000–0999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-08-14 661-407-7XXX 7000–7999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-08-14 661-741-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-08-14 661-741-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-08-08 661-536-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C GLENNVILLE CA
2018-08-02 661-766-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CUYAMA CA
2018-07-17 661-501-1XXX 1000–1999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD SOUTH CA
2018-07-09 661-458-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2018-07-09 661-977-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA SGCC CA
2018-06-28 661-591-9XXX 9000–9999Assigned TELNYX LLC 073H GLENNVILLE CA
2018-06-28 661-689-3XXX 3000–3999Assigned TELNYX LLC 073H CLFRNHTSPG CA
2018-06-28 661-762-9XXX 9000–9999Assigned TELNYX LLC 073H MCKITTRICK CA
2018-06-27 661-413-8XXX 8000–8999Assigned TELNYX LLC 073H CUYAMA CA
2018-06-27 661-452-1XXX 1000–1999Assigned TELNYX LLC 073H BERENDMESA CA
2018-06-27 661-764-8XXX 8000–8999Assigned TELNYX LLC 073H BUTTONWLLW CA
2018-06-27 661-773-3XXX 3000–3999Assigned TELNYX LLC 073H WALKERBSIN CA
2018-06-27 661-849-9XXX 9000–9999Assigned TELNYX LLC 073H EARLIMART CA
2018-06-26 661-235-7XXX 7000–7999Assigned TELNYX LLC 073H ROSAMOND CA
2018-06-26 661-261-9XXX 9000–9999Assigned TELNYX LLC 073H BIG BUTTE CA
2018-06-26 661-320-1XXX 1000–1999Assigned TELNYX LLC 073H LEBEC CA
2018-06-26 661-385-2XXX 2000–2999Assigned TELNYX LLC 073H EDWARDS CA
2018-06-26 661-768-9XXX 9000–9999Assigned TELNYX LLC 073H TAFT CA
2018-06-26 661-793-9XXX 9000–9999Assigned TELNYX LLC 073H PLDL LNVY CA
2018-06-26 661-797-5XXX 5000–5999Assigned TELNYX LLC 073H LOST HILLS CA
2018-05-09 661-479-4XXX 4000–4999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-05-09 661-479-9XXX 9000–9999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-05-09 661-662-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-05-09 661-741-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-05-09 661-741-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-05-09 661-741-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-05-01 661-409-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D PLDL PLDL CA
2018-05-01 661-741-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-05-01 661-741-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-05-01 661-741-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-05-01 661-741-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2018-04-26 661-405-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H LANCASTER CA
2018-04-26 661-417-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H SNCA NHCS CA
2018-04-16 661-479-8XXX 8000–8999Assigned BHN IP ENABLED SERVICES, LLC 045L BKFD MAIN CA
2018-04-12 661-407-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-04-12 661-407-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-04-12 661-479-3XXX 3000–3999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-04-12 661-759-6XXX 6000–6999Assigned METROPCS, INC. 5562 WASCO CA
2018-04-11 661-417-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D SNCA NHCS CA
2018-04-11 661-486-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D PLDL AGDL CA
2018-04-06 661-553-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DELANO CA
2018-04-06 661-553-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DELANO CA
2018-03-28 661-454-2XXX 2000–2999Assigned METROPCS, INC. 5562 DELANO CA
2018-03-27 661-458-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MCFARLAND 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.