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 310
T-MOBILE USA, INC. 498
LEVEL 3 COMMUNICATIONS, LLC - CA 246
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 215
NEW CINGULAR WIRELESS PCS, LLC 198
ONVOY, LLC - CA 177
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
2005-05-31 310-933-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2005-05-27 310-388-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2005-05-27 310-402-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2005-05-27 310-407-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2005-05-27 310-571-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2005-05-26 310-744-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2005-05-26 310-744-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2005-05-26 310-987-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2005-05-23 310-633-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN SNMN CA
2005-05-23 310-882-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2005-05-23 310-903-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2005-05-19 310-359-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MALIBU CA
2005-05-19 310-359-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MALIBU CA
2005-05-17 310-591-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN MRVS CA
2005-05-17 310-882-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2005-05-12 310-882-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C W ANGELES CA
2005-05-11 310-873-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2005-05-11 310-944-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2005-05-11 310-944-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2005-05-11 310-986-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOMITA CA
2005-05-10 310-703-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2005-05-10 310-703-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D INGLEWOOD CA
2005-05-10 310-806-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2005-05-03 310-818-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CMTN GRDN CA
2005-05-02 310-404-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2005-04-28 310-237-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2005-04-28 310-536-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2005-04-28 310-706-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2005-04-27 310-774-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MALIBU CA
2005-04-26 310-256-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2005-04-26 310-256-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2005-04-21 310-347-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TORRANCE CA
2005-04-21 310-439-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2005-04-21 310-439-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2005-04-21 310-561-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TORRANCE CA
2005-04-21 310-781-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2005-04-21 310-844-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAWTHORNE CA
2005-04-21 310-956-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAWTHORNE CA
2005-04-21 310-956-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAWTHORNE CA
2005-04-19 310-796-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDONDO CA
2005-04-19 310-796-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDONDO CA
2005-04-19 310-796-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDONDO CA
2005-04-12 310-622-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2005-04-08 310-280-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CULVERCITY CA
2005-04-08 310-844-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAWTHORNE CA
2005-04-08 310-844-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAWTHORNE CA
2005-04-08 310-987-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2005-04-05 310-256-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2005-04-05 310-256-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2005-04-05 310-482-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS 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.