NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 323
ONVOY, LLC - CA 1
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
2016-09-22 323-713-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-09-21 323-713-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 09 CA
2016-09-16 323-406-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-09-16 323-475-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-09-16 323-510-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-09-16 323-604-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-09-16 323-723-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-09-16 323-944-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2016-09-02 323-616-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LSAN DA 03 CA
2016-09-02 323-616-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 03 CA
2016-08-30 323-530-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MONTEBELLO CA
2016-08-25 323-618-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 02 CA
2016-08-25 323-986-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2016-08-24 323-601-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2016-08-24 323-642-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2016-08-17 323-917-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 13 CA
2016-08-15 323-354-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-08-15 323-647-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-08-15 323-943-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-08-15 323-943-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-08-09 323-705-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LSAN DA 02 CA
2016-08-09 323-713-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2016-07-27 323-689-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2016-07-27 323-689-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2016-07-27 323-689-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2016-07-27 323-689-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 08 CA
2016-07-27 323-705-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2016-07-27 323-705-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2016-07-27 323-705-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2016-07-27 323-716-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2016-07-27 323-716-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2016-07-27 323-716-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2016-07-27 323-716-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2016-07-26 323-616-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-07-26 323-616-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-07-26 323-616-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-07-26 323-616-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-07-25 323-504-7XXX 7000–7999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-504-8XXX 8000–8999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-504-9XXX 9000–9999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-701-8XXX 8000–8999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-701-9XXX 9000–9999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-946-0XXX 0000–0999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-946-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2016-07-25 323-946-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2016-07-25 323-946-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2016-07-25 323-946-4XXX 4000–4999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-946-5XXX 5000–5999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-946-8XXX 8000–8999Assigned HD CARRIER LLC 321J LSAN DA 14 CA
2016-07-25 323-946-9XXX 9000–9999Assigned HD CARRIER LLC 321J LSAN DA 14 CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.