NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 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
2003-05-07 323-218-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2003-05-07 323-218-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2003-05-07 323-218-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2003-05-01 323-208-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-05-01 323-217-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-05-01 323-217-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-05-01 323-217-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-05-01 323-217-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-05-01 323-308-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-05-01 323-308-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-05-01 323-327-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-05-01 323-327-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-05-01 323-327-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-05-01 323-327-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-05-01 323-327-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-04-04 323-220-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-04-04 323-220-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-04-04 323-220-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-04-04 323-220-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-04-04 323-220-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-04-04 323-289-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 12 CA
2003-04-04 323-289-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 12 CA
2003-04-04 323-289-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 12 CA
2003-04-04 323-289-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 12 CA
2003-04-04 323-606-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 14 CA
2003-02-24 323-244-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2003-02-24 323-244-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2003-02-24 323-244-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2003-02-24 323-244-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2003-02-24 323-244-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2003-02-24 323-244-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2003-02-07 323-337-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-02-07 323-337-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-02-07 323-337-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-02-07 323-337-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-02-07 323-337-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-02-07 323-337-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-01-22 323-284-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 02 CA
2003-01-10 323-217-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2003-01-03 323-203-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-01-03 323-203-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-01-03 323-327-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2003-01-03 323-327-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2002-12-18 323-271-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTEBELLO CA
2002-12-18 323-302-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
2002-12-18 323-306-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 08 CA
2002-12-18 323-319-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2002-12-18 323-843-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2002-12-04 323-327-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 09 CA
2002-09-19 323-215-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 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.