NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 909
ONVOY, LLC - CA 6
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2
BANDWIDTH.COM CLEC, 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-12-29 909-327-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2004-12-29 909-327-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2004-12-22 909-438-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2004-12-22 909-539-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2004-12-21 909-522-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2004-12-21 909-522-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2004-12-21 909-522-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2004-12-21 909-743-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2004-12-21 909-743-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2004-12-21 909-743-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2004-12-21 909-743-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2004-12-21 909-743-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2004-12-21 909-743-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FONTANA CA
2004-12-20 909-753-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2004-12-17 909-512-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2004-12-17 909-580-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2004-12-17 909-743-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2004-12-17 909-743-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2004-12-17 909-992-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POMONA CA
2004-12-16 909-810-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MENTONE CA
2004-12-15 909-954-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2004-12-13 909-522-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2004-12-10 909-580-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2004-12-10 909-942-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 UPLAND CA
2004-12-08 909-266-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2004-12-08 909-267-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLAREMONT CA
2004-12-08 909-438-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHINO CA
2004-12-08 909-503-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2004-12-08 909-562-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIALTO CA
2004-12-08 909-562-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIALTO CA
2004-12-08 909-569-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DIAMONDBAR CA
2004-12-08 909-583-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2004-12-08 909-644-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIALTO CA
2004-12-08 909-647-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HIGHLAND CA
2004-12-08 909-992-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-12-08 909-992-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-12-08 909-992-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-12-06 909-912-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 UPLAND CA
2004-12-06 909-912-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 UPLAND CA
2004-12-02 909-539-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CHINO CA
2004-12-02 909-803-2XXX 2000–2999Assigned FRONTIER CALIFORNIA INC. 2319 ETIWANDA CA
2004-11-24 909-254-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 COLTON CA
2004-11-24 909-525-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2004-11-24 909-992-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2004-11-23 909-456-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ONTARIO CA
2004-11-23 909-569-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DIAMONDBAR CA
2004-11-23 909-740-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ONTARIO CA
2004-11-23 909-773-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ONTARIO CA
2004-11-23 909-935-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ONTARIO CA
2004-11-22 909-810-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MENTONE 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.