NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 213
T-MOBILE USA, INC. 1276
ONVOY, LLC - CA 827
BANDWIDTH.COM CLEC, LLC - CA 547
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 389
NEW CINGULAR WIRELESS PCS, LLC 335
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
2021-05-04 213-497-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 05 CA
2021-05-04 213-543-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 03 CA
2021-05-04 213-551-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 07 CA
2021-05-04 213-551-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-05-04 213-551-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-05-04 213-551-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-05-04 213-551-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-05-04 213-551-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-05-04 213-551-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-05-04 213-552-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MONTEBELLO CA
2021-05-04 213-554-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 10 CA
2021-05-04 213-554-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-05-04 213-554-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-05-04 213-554-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-05-04 213-554-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-05-04 213-554-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-05-04 213-554-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-05-04 213-577-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 04 CA
2021-05-04 213-583-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 13 CA
2021-04-28 213-491-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2021-04-28 213-515-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2021-04-28 213-644-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2021-04-28 213-772-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2021-04-12 213-522-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-04-12 213-522-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-04-12 213-522-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-04-12 213-522-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-04-12 213-522-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-04-12 213-557-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2021-04-12 213-557-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2021-04-12 213-557-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2021-04-12 213-557-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2021-04-12 213-557-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2021-04-06 213-556-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-04-06 213-556-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-04-06 213-556-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-04-06 213-556-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-04-06 213-556-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-03-30 213-772-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C LSAN DA 02 CA
2021-03-29 213-789-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 02 CA
2021-03-25 213-522-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2021-03-25 213-522-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2021-03-25 213-547-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2021-03-25 213-655-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2021-03-24 213-583-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2021-03-22 213-543-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2021-03-22 213-543-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2021-03-22 213-543-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2021-03-22 213-552-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2021-03-22 213-552-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO 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.