NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-03-24 661-558-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2016-03-10 661-771-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TEHACHAPI CA
2016-03-09 661-338-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2016-03-09 661-338-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LAKEHUGHES CA
2016-03-09 661-727-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2016-03-09 661-727-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2016-03-08 661-372-3XXX 3000–3999Assigned METROPCS, INC. 5562 DELANO CA
2016-03-07 661-585-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K PLDL PLDL CA
2016-03-01 661-558-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BKFD MAIN CA
2016-02-26 661-558-8XXX 8000–8999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2016-02-26 661-558-9XXX 9000–9999Assigned METROPCS, INC. 5562 BKFD MAIN CA
2016-02-25 661-469-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BUTTONWLLW CA
2016-02-24 661-276-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C EDWARDS CA
2016-02-24 661-276-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C EDWARDS CA
2016-02-24 661-546-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BKFD MAIN CA
2016-02-23 661-535-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2016-02-23 661-535-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BKFD NORTH CA
2016-02-23 661-583-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D PLDL PLDL CA
2016-02-23 661-585-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2016-02-23 661-585-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2016-02-23 661-585-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2016-02-19 661-309-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SNCA SGCC CA
2016-02-12 661-339-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2016-02-12 661-582-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2016-02-12 661-582-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LANCASTER CA
2016-02-12 661-727-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2016-02-11 661-413-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CUYAMA CA
2016-02-11 661-455-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GLENNVILLE CA
2016-02-11 661-460-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WALKERBSIN CA
2016-02-11 661-704-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MCKITTRICK CA
2016-02-10 661-568-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2016-02-10 661-568-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNCA NHCS CA
2016-02-10 661-568-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNCA NHCS CA
2016-02-08 661-583-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2016-02-08 661-583-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C PLDL PLDL CA
2016-01-11 661-542-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2016-01-11 661-542-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNCA SGCC CA
2015-12-30 661-462-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2015-12-30 661-463-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2015-12-30 661-463-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C HI VISTA CA
2015-12-30 661-532-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BIG BUTTE CA
2015-12-11 661-490-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2015-12-11 661-546-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C BKFD MAIN CA
2015-12-07 661-542-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA SGCC CA
2015-12-07 661-542-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNCA SGCC CA
2015-11-25 661-582-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2015-11-24 661-421-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2015-11-24 661-421-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BKFD MAIN CA
2015-11-24 661-543-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA
2015-11-24 661-543-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MCFARLAND CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.