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
2004-02-19 310-735-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2004-02-17 310-525-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CMTN GRDN CA
2004-02-17 310-971-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D SAN PEDRO CA
2004-02-11 310-483-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-02-11 310-483-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-02-11 310-483-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-02-11 310-953-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-02-06 310-431-2XXX 2000–2999Assigned PACIFIC BELL 9740 INGLEWOOD CA
2004-02-02 310-547-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2004-01-30 310-903-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J W ANGELES CA
2004-01-29 310-707-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2004-01-28 310-743-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2004-01-27 310-743-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2004-01-23 310-806-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2004-01-23 310-806-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2004-01-22 310-593-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2004-01-20 310-947-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2004-01-19 310-242-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D INGLEWOOD CA
2004-01-19 310-707-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2004-01-16 310-622-6XXX 6000–6999Assigned PAETEC COMMUNICATIONS, INC. - CA 4733 W ANGELES CA
2004-01-16 310-698-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J REDONDO CA
2004-01-15 310-357-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-01-15 310-357-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-01-15 310-357-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-01-15 310-357-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2004-01-15 310-683-1XXX 1000–1999Assigned PAETEC COMMUNICATIONS, INC. - CA 4733 REDONDO CA
2004-01-15 310-692-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2004-01-15 310-692-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2004-01-15 310-957-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D INGLEWOOD CA
2004-01-15 310-957-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D INGLEWOOD CA
2004-01-14 310-692-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2004-01-08 310-971-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D SAN PEDRO CA
2003-12-31 310-844-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAWTHORNE CA
2003-12-31 310-844-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAWTHORNE CA
2003-12-29 310-349-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2003-12-29 310-531-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2003-12-23 310-341-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2003-12-23 310-579-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MALIBU CA
2003-12-23 310-622-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J W ANGELES CA
2003-12-22 310-406-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2003-12-22 310-691-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BEVERLYHLS CA
2003-12-18 310-806-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2003-12-18 310-806-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2003-12-18 310-806-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2003-12-16 310-981-9XXX 9000–9999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J INGLEWOOD CA
2003-11-26 310-598-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BEVERLYHLS CA
2003-11-21 310-347-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TORRANCE CA
2003-11-21 310-347-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TORRANCE CA
2003-11-17 310-754-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNMN MRVS CA
2003-11-17 310-754-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J 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.