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
2021-09-01 661-521-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-08-31 661-641-1XXX 1000–1999Assigned SKYE TELECOM LLC DBA SKYETEL 622J EDWARDS CA
2021-08-26 661-512-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL AGDL CA
2021-08-26 661-521-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PLDL PLDL CA
2021-08-19 661-463-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J HI VISTA CA
2021-08-16 661-688-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2021-08-12 661-232-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MOJAVE CA
2021-08-12 661-232-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MOJAVE CA
2021-08-12 661-372-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2021-08-11 661-732-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J DELANO CA
2021-08-03 661-627-5XXX 5000–5999Assigned TON80 COMMUNICATIONS, LLC 516J SNCA NHCS CA
2021-07-29 661-521-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 661-521-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 661-521-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 661-521-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 661-521-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 661-521-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 661-788-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BKFD SOUTH CA
2021-07-28 661-887-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-28 661-887-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-28 661-887-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-28 661-887-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-18 661-214-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LOST HILLS CA
2021-07-18 661-278-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C EDWARDS CA
2021-07-18 661-420-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CUYAMA CA
2021-07-18 661-519-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ARVIN CA
2021-07-18 661-519-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ARVIN CA
2021-07-18 661-536-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C GLENNVILLE CA
2021-07-18 661-551-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BERENDMESA CA
2021-07-18 661-552-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C EARLIMART CA
2021-07-18 661-552-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C EARLIMART CA
2021-07-18 661-761-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C MCKITTRICK CA
2021-07-18 661-788-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BKFD SOUTH CA
2021-07-13 661-933-3XXX 3000–3999Assigned FRACTEL, LLC 965H BKFD NORTH CA
2021-06-30 661-519-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-30 661-519-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-30 661-519-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-30 661-519-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-29 661-655-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-29 661-934-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-29 661-934-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-29 661-934-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-27 661-788-1XXX 1000–1999Assigned COMMIO, LLC 939H BKFD SOUTH CA
2021-06-27 661-788-2XXX 2000–2999Assigned COMMIO, LLC 939H BKFD SOUTH CA
2021-06-27 661-788-3XXX 3000–3999Assigned COMMIO, LLC 939H BKFD SOUTH CA
2021-06-25 661-276-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C EDWARDS CA
2021-06-25 661-320-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LEBEC CA
2021-06-25 661-320-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LEBEC CA
2021-06-25 661-344-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C EARLIMART CA
2021-06-25 661-344-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C EARLIMART 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.