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
2003-07-31 310-633-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNMN SNMN CA
2003-07-31 310-633-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNMN SNMN CA
2003-07-16 310-696-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2003-07-16 310-872-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D SAN PEDRO CA
2003-07-16 310-971-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2003-07-15 310-894-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CMTN CMTN CA
2003-07-15 310-907-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNMN SNMN CA
2003-07-10 310-707-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2003-07-08 310-597-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-08 310-622-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-08 310-622-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-08 310-694-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-08 310-694-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-08 310-694-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-08 310-889-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2003-07-07 310-270-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEVERLYHLS CA
2003-07-07 310-270-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEVERLYHLS CA
2003-07-07 310-491-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2003-07-07 310-491-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2003-07-07 310-491-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2003-07-07 310-590-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2003-07-03 310-622-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 W ANGELES CA
2003-07-01 310-597-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2003-06-25 310-597-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 W ANGELES CA
2003-06-19 310-270-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2003-06-19 310-270-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2003-06-19 310-692-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2003-06-19 310-903-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2003-06-19 310-903-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2003-06-19 310-903-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 W ANGELES CA
2003-06-19 310-916-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CULVERCITY CA
2003-06-17 310-220-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAWTHORNE CA
2003-06-17 310-469-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL SEGUNDO CA
2003-06-17 310-707-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2003-06-17 310-947-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDONDO CA
2003-06-17 310-974-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TORRANCE CA
2003-06-16 310-270-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2003-06-16 310-270-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2003-06-16 310-270-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2003-06-13 310-916-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2003-06-13 310-916-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2003-06-13 310-916-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2003-06-13 310-916-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2003-06-13 310-916-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CULVERCITY CA
2003-06-06 310-237-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CULVERCITY CA
2003-06-06 310-707-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN PEDRO CA
2003-05-30 310-707-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SAN PEDRO CA
2003-05-27 310-227-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL SEGUNDO CA
2003-05-27 310-347-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TORRANCE CA
2003-05-27 310-460-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNMN SNMN 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.