NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 1
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
2014-02-21 909-990-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RIALTO CA
2014-02-14 909-326-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J POMONA CA
2014-02-13 909-485-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARROWHEAD CA
2014-02-12 909-657-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ONTARIO CA
2014-02-10 909-306-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2014-02-07 909-485-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2014-01-21 909-360-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 UPLAND CA
2014-01-10 909-453-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2014-01-07 909-657-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D ONTARIO CA
2014-01-06 909-347-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2013-12-27 909-219-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2013-12-20 909-351-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MENTONE CA
2013-12-19 909-487-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CRESTLINE CA
2013-12-09 909-368-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2013-12-09 909-368-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2013-11-26 909-485-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2013-11-22 909-312-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDLANDS CA
2013-11-22 909-312-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDLANDS CA
2013-11-22 909-453-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2013-11-22 909-453-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2013-11-21 909-906-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2013-11-08 909-312-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2013-11-07 909-326-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POMONA CA
2013-11-05 909-361-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2013-11-01 909-326-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C POMONA CA
2013-11-01 909-326-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C POMONA CA
2013-11-01 909-378-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C DIAMONDBAR CA
2013-11-01 909-378-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C DIAMONDBAR CA
2013-10-31 909-344-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLAREMONT CA
2013-10-31 909-378-1XXX 1000–1999Assigned PACIFIC BELL (COMPETITIVE) 7480 DIAMONDBAR CA
2013-10-30 909-485-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2013-10-28 909-487-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CRESTLINE CA
2013-10-08 909-371-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2013-10-08 909-454-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2013-10-08 909-454-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2013-10-08 909-906-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2013-09-20 909-485-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2013-09-05 909-360-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 UPLAND CA
2013-09-04 909-315-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2013-09-04 909-454-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2013-08-27 909-341-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIALTO CA
2013-08-27 909-371-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FONTANA CA
2013-08-27 909-744-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARROWHEAD CA
2013-08-27 909-929-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CLAREMONT CA
2013-08-27 909-953-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C COLTON CA
2013-08-23 909-378-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 DIAMONDBAR CA
2013-08-22 909-453-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J S BERNDINO CA
2013-08-20 909-325-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHINO CA
2013-08-14 909-344-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2013-08-14 909-378-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DIAMONDBAR 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.