NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

18 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
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2
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
2018-12-03 661-409-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-11-30 661-271-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MOJAVE CA
2018-11-27 661-498-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD NORTH CA
2018-11-26 661-498-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-26 661-498-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-26 661-498-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-26 661-498-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-26 661-498-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-26 661-498-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-26 661-498-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-21 661-218-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-21 661-218-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-21 661-218-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D BKFD NORTH CA
2018-11-21 661-501-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD SOUTH CA
2018-11-21 661-515-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HI VISTA CA
2018-11-21 661-591-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GLENNVILLE CA
2018-11-14 661-553-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DELANO CA
2018-10-18 661-409-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-10-18 661-409-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-10-11 661-402-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL AGDL CA
2018-10-11 661-439-0XXX 0000–0999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-10-11 661-439-1XXX 1000–1999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-10-11 661-439-2XXX 2000–2999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-10-11 661-454-4XXX 4000–4999Assigned METROPCS, INC. 5562 DELANO CA
2018-10-11 661-759-4XXX 4000–4999Assigned METROPCS, INC. 5562 WASCO CA
2018-10-11 661-793-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL LNVY CA
2018-10-09 661-403-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL PLDL CA
2018-10-04 661-501-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD SOUTH CA
2018-10-01 661-430-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNCA SGCC CA
2018-10-01 661-534-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DELANO CA
2018-09-25 661-515-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HI VISTA CA
2018-09-25 661-515-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HI VISTA CA
2018-09-25 661-515-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HI VISTA CA
2018-09-25 661-764-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BUTTONWLLW CA
2018-09-25 661-773-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WALKERBSIN CA
2018-09-24 661-532-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BIG BUTTE CA
2018-09-24 661-724-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LAKEHUGHES CA
2018-09-19 661-439-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BKFD MAIN CA
2018-09-17 661-825-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEHACHAPI CA
2018-09-13 661-407-6XXX 6000–6999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-09-05 661-765-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C TAFT CA
2018-09-05 661-768-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TAFT CA
2018-08-30 661-403-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-08-30 661-403-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PLDL PLDL CA
2018-08-23 661-417-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNCA NHCS CA
2018-08-22 661-727-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HI VISTA CA
2018-08-16 661-439-4XXX 4000–4999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-08-16 661-439-5XXX 5000–5999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-08-16 661-439-6XXX 6000–6999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2018-08-16 661-439-7XXX 7000–7999Assigned METROPCS, INC. 5562 BKFD MAIN 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.